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Magnolia

Magnolia

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Foodplant / pathogen
Armillaria mellea s.l. infects and damages Magnolia

Plant / epiphyte
epiphyllous thallus of Cephaleuros grows on live leaf of Magnolia

Foodplant / pathogen
Cucumber Mosaic virus infects and damages mottled or patterned leaf of Magnolia
Remarks: Other: uncertain

Foodplant / pathogen
Tubercularia anamorph of Nectria cinnabarina infects and damages branch of Magnolia
Remarks: season: 1-12

Foodplant / sap sucker
Parthenolecanium corni sucks sap of live shoot of Magnolia

Foodplant / sap sucker
hypophyllous Pulvinaria floccifera sucks sap of live leaf of Magnolia

Foodplant / sap sucker
Pulvinaria regalis sucks sap of live branch of Magnolia

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Brief Summary

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Magnolia (magnolia) is a genus of about 80–210 (depending on the classification system) species of trees and shrubs in the Magnoliaceae (magnolia family), native to eastern and central Asia (including the Himalayas) and North and Central America. The genus is characterized by large, showy flowers, and often with evergreen or semi-evergreen leaves. Magnolia is one of the most ancient angiosperm (flowering plant) genera, with fossil specimens dated at 20 million years old, and fossils of plants belonging to the Magnoliaceae family dating to 95 million years ago. The genus appears to have evolved before bees appeared, so the floral structure developed to encourage pollination by beetles, as described in this video on the southern magnolia, M. grandiflora (see YouTube clip). Magnolias have large, aromatic flowers, usually bisexual (perfect), with 3 sepals and 6–12 petals (sepals and petals are not clearly differentiated, so are called tepals), with many stamens in a spiral. Flowers may be white, cream, yellow, pink, or purple. Flowers, borne on branch tips, have numerous simple ovaries in the center, which form a cone-like fruit with seeds (usually red) hanging from the center by slender stems. Leaves are alternate and entire (smooth-margined), and are tough, leathery, and evergreen in some species, but thin and deciduous in others. Leaves are quite large in some species, and are generally considered attractive, but lack fall color. Eight species of Magnolia are native to the southeastern U.S., where they have become a popular symbol of southern culture, used in myriad place names and in literature, music (including magnolia-titled songs by the Grateful Dead, Beck, and JJ Cale), movies, and art. Magnolia is the state tree of Mississippi, and M. grandiflora (southern magnolia or sweet bay) is the state flower of both Mississippi and Louisiana. Many magnolias are cultivated as garden ornamentals, and numerous cultivars and hybrids of North American and Asian species have been developed. Gardeners consider magnolia flowers to be of unsurpassed magnificence among temperate species—M. grandiflora has the largest flower of any North American species. In addition to their horticultural uses, a few magnolia species are used locally as timber sources, including M. acuminata, M. grandiflora, and M. virginiana in the southeastern U.S. Popular North American species for garden use include M. grandiflora (laurel, southern magnolia, or sweet bay; M. virginiana (sweet bay); M. macrophylla (big-leaf magnolia); M. tripetala (umbrella tree); and M. acuminata (cucumber tree). Hybrids include Thompson’s magnolia (M. tripetala X virginiana). Popular Asian species include M. liliflora or M. quinquipeta (lily magnolia); M. denudata and M. heptapeta (yulan magnolia); M. X soulangeana (saucer magnolia, a hybrid between lily and yulan magnolias); M. sieboldii (Oyama magnolia, the national tree of North Korea); and M. stellata (star magnolia). These Asian species range from small shrubs to tall trees, with flower colors ranging from white to pink to crimson to purple, and fruits with diverse colors. Magnolias (in particular M. officials) have been used for medicinal purposes in China, for a tonic to treat neurosis and gastrointestinal disorders. Documents dating to 1083 record these uses, and extensive cutting of trees to make the tonic has led to declines of wild magnolia populations. (Encyclopedia Britannica 1993, Everett 1981, Wikipedia 2011)
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Magnolia

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Magnolia is a large genus of about 210 to 340[a] flowering plant species in the subfamily Magnolioideae of the family Magnoliaceae. It is named after French botanist Pierre Magnol.

Magnolia is an ancient genus. Appearing before bees evolved, the flowers are theorized to have evolved to encourage pollination by beetles.[2] To avoid damage from pollinating beetles, the carpels of Magnolia flowers are extremely tough.[3] Fossilized specimens of M. acuminata have been found dating to 20 million years ago, and fossils of plants identifiably belonging to the Magnoliaceae date to 95 million years ago.[4] Another aspect of Magnolia considered to represent an ancestral state is that the flower bud is enclosed in a bract rather than in sepals; the perianth parts are undifferentiated and called tepals rather than distinct sepals and petals. Magnolia shares the tepal characteristic with several other flowering plants near the base of the flowering plant lineage such as Amborella and Nymphaea (as well as with many more recently derived plants such as Lilium).

The natural range of Magnolia species is a disjunct distribution, with a main center in east and southeast Asia and a secondary center in eastern North America, Central America, the West Indies, and some species in South America.

Description

Magnolia seeds and fruit on a tree in northern Argentina

Magnolias are spreading, evergreen or deciduous trees or shrubs, characterised by large fragrant flowers which may be bowl-shaped or star-shaped, in shades of white, pink, purple, green or yellow. In deciduous species the blooms often appear before the leaves, in spring. Cone-like fruits are often produced in autumn.[5]

As with all Magnoliaceae, the perianth is undifferentiated, with 9–15 tepals in three or more whorls. The flowers are hermaphroditic with numerous adnate carpels and stamens are arranged in a spiral fashion on the elongated receptacle. The fruit dehisces along the dorsal sutures of the carpels. The pollen is monocolpate, and the embryo development is of the Polygonum type.

Taxonomists, including James E. Dandy in 1927, have long had an interest in observing fruits of Magnoliaceae and have often used the differences, or perceived differences, in fruit characters to justify systems for classification.[6]

Magnolia × soulangeana

Taxonomy

History

Early

Magnolia flowers in Wiesbaden, Germany

The name Magnolia first appeared in 1703 in the Genera[7] of Charles Plumier (1646–1704), for a flowering tree from the island of Martinique (talauma). It was named after the French botanist Pierre Magnol. English botanist William Sherard, who studied botany in Paris under Joseph Pitton de Tournefort, a pupil of Magnol, was most probably the first after Plumier to adopt the genus name Magnolia. He was at least responsible for the taxonomic part of Johann Jacob Dillenius's Hortus Elthamensis[8] and of Mark Catesby's Natural History of Carolina, Florida and the Bahama Islands.[9] These were the first works after Plumier's Genera that used the name Magnolia, this time for some species of flowering trees from temperate North America. The species that Plumier originally named Magnolia was later described as Annona dodecapetala by Lamarck,[10] and has since been named Magnolia plumieri and Talauma plumieri (and still a number of other names) but is now known as Magnolia dodecapetala.[b]

Carl Linnaeus, who was familiar with Plumier's Genera, adopted the genus name Magnolia in 1735 in his first edition of Systema Naturae, without a description, but with a reference to Plumier's work. In 1753, he took up Plumier's Magnolia in the first edition of Species Plantarum. There he described a monotypic genus, with the sole species being Magnolia virginiana. Since Linnaeus never saw a herbarium specimen (if there ever was one) of Plumier's Magnolia and had only his description and a rather poor picture at hand, he must have taken it for the same plant which was described by Catesby in his 1730 Natural History of Carolina. He placed it in the synonymy of Magnolia virginiana var. fœtida, the taxon now known as Magnolia grandiflora. Under Magnolia virginiana Linnaeus described five varieties (glauca, fœtida, grisea, tripetala, and acuminata). In the tenth edition of Systema Naturae (1759), he merged grisea with glauca, and raised the four remaining varieties to species status.[c]

By the end of the 18th century, botanists and plant hunters exploring Asia began to name and describe the Magnolia species from China and Japan. The first Asiatic species to be described by western botanists were Magnolia denudata, Magnolia liliiflora,[d] Magnolia coco and Magnolia figo.[e] Soon after that, in 1794, Carl Peter Thunberg collected and described Magnolia obovata from Japan and at roughly the same time Magnolia kobus was also first collected.[11]

Recent

With the number of species increasing, the genus was divided into the two subgenera Magnolia and Yulania. Magnolia contains the American evergreen species M. grandiflora, which is of horticultural importance, especially in the southeastern United States, and M. virginiana, the type species. Yulania contains several deciduous Asiatic species, such as M. denudata and M. kobus, which have become horticulturally important in their own right and as parents in hybrids. Classified in Yulania, is also the American deciduous M. acuminata (cucumber tree), which has recently attained greater status as the parent responsible for the yellow flower color in many new hybrids.

Relations in the family Magnoliaceae have been puzzling taxonomists for a long time. Because the family is quite old and has survived many geological events (such as ice ages, mountain formation, and continental drift), its distribution has become scattered. Some species or groups of species have been isolated for a long time, while others could stay in close contact. To create divisions in the family (or even within the genus Magnolia), solely based upon morphological characters, has proven to be a nearly impossible task.[f]

By the end of the 20th century, DNA sequencing had become available as a method of large-scale research on phylogenetic relationships. Several studies, including studies on many species in the family Magnoliaceae, were carried out to investigate relationships.[12][13][14] What these studies all revealed was that genus Michelia and Magnolia subgenus Yulania were far more closely allied to each other than either one of them was to Magnolia subgenus Magnolia. These phylogenetic studies were supported by morphological data.[15]

As nomenclature is supposed to reflect relationships, the situation with the species names in Michelia and Magnolia subgenus Yulania was undesirable. Taxonomically, three choices are available:

  1. to join Michelia and Yulania species in a common genus, not being Magnolia (for which the name Michelia has priority);
  2. to raise subgenus Yulania to generic rank, leaving Michelia names and subgenus Magnolia names untouched, or;
  3. to join Michelia with genus Magnolia into genus Magnolia s.l. (a big genus).

Magnolia subgenus Magnolia cannot be renamed because it contains M. virginiana, the type species of the genus and of the family.

Not many Michelia species have so far become horticulturally or economically important, apart from their wood. Both subgenus Magnolia and subgenus Yulania include species of major horticultural importance, and a change of name would be very undesirable for many people, especially in the horticultural branch. In Europe, Magnolia even is more or less a synonym for Yulania, since most of the cultivated species on this continent have Magnolia (Yulania) denudata as one of their parents. Most taxonomists who acknowledge close relations between Yulania and Michelia therefore support the third option and join Michelia with Magnolia.

The same goes, mutatis mutandis, for the (former) genera Talauma and Dugandiodendron, which are then placed in subgenus Magnolia, and genus Manglietia, which could be joined with subgenus Magnolia or may even earn the status of an extra subgenus. Elmerrillia seems to be closely related to Michelia and Yulania, in which case it will most likely be treated in the same way as Michelia is now. The precise nomenclatural status of small or monospecific genera like Kmeria, Parakmeria, Pachylarnax, Manglietiastrum, Aromadendron, Woonyoungia, Alcimandra, Paramichelia and Tsoongiodendron remains uncertain. Taxonomists who merge Michelia into Magnolia tend to merge these small genera into Magnolia s.l. as well. Botanists do not yet agree on whether to recognize a big Magnolia or the different small genera. For example, Flora of China offers two choices: a large genus Magnolia which includes about 300 species, everything in the Magnoliaceae except Liriodendron (tulip tree), or 16 different genera, some of them recently split out or re-recognized, each of which contains up to 50 species.[16] The western co-author favors the big genus Magnolia, whereas the Chinese recognize the different small genera.

Fossil record

Fossils assignable to Magnolia extend into the Paleogene, such as Magnolia nanningensis, named for mummified wood from the Oligocene of Guangxi, China, which has a close affinity to members of the modern secton Michelia.[17]

Subdivision

In 2012, the Magnolia Society published on its website a classification of the genus produced by Richard B. Figlar, based on a 2004 classification by Figlar and Hans Peter Nooteboom. Species of Magnolia were listed under three subgenera, 12 sections, and 13 subsections.[18][19] Subsequent molecular phylogenetic studies have led to some revisions of this system; for example, the subgenus Magnolia was found not to be monophyletic. A revised classification in 2020, based on a phylogenetic analysis of complete chloroplast genomes, abandoned subgenera and subsections, dividing Magnolia into 15 sections. The relationships among these sections are shown in the following cladogram, as is the paraphyletic status of subgenus Magnolia.[20]

Clade I

M. sect. Splendentes

M. sect. Talauma

M. sect. Gwillimia

Clade II Clade A

M. sect. Tuliparia

M. sect. Macrophylla

Clade B

M. sect. Magnolia

M. sect. Oyama

M. sect. Rytidospermum

M. sect. Manglietia

Clade C

M. sect. Kmeria

M. sect. Gynopodium

M. sect. Tulipastrum

M. sect. Yuliana

M. sect. Maingola

M. sect. Michelia

M. subg. Magnolia (not monophyletic)
M. subg. Gynopodium
M. subg. Yuliana

The table below compares the 2012 and 2020 classifications. (The exact circumscriptions of the corresponding taxa may not be the same.)

Species

The species lists below are divided according to the Magnolia Society's 2012 classification.[18]

Subgenus Magnolia

Anthers open by splitting at the front facing the centre of the flower, deciduous or evergreen, flowers produced after the leaves.

Section Magnolia
Section Gwillimia
Subsection Gwillimia
Subsection Blumiana
Section Talauma
Subsection Talauma
Subsection Dugandiodendron
Subsection Cubenses
Section Manglietia
Section Kmeria
Section Rhytidospermum
M. obovata
Subsection Rhytidospermum
M. wilsonii
Subsection Oyama
  • Magnolia globosa Hook. f. & Thoms. (Nepal, Burma)
  • Magnolia sieboldii K. Koch (Korea, E China, Japan)
    • Magnolia sieboldii subsp. japonica K.Ueda (Japan, central China)
    • Magnolia sieboldii subsp. sieboldii (Japan)
    • Magnolia sieboldii subsp. sinensis (Rehd. & Wilson) Spongberg (central China)
  • Magnolia wilsonii (Finet. & Gagnep.) Rehd. - Wilson's magnolia (SW China)
M. fraseri
Section Auriculata
  • Magnolia fraseri Walt. - Fraser magnolia or ear-leaved magnolia (SE US)
    • Magnolia fraseri var. fraseri - Fraser magnolia or ear-leaved magnolia (SE US)
    • Magnolia fraseri var. pyramidata (Bartram) Pampanini - pyramid magnolia (SE US)[g]
M. macrophylla var. ashei flower in female phase
Section Macrophylla
  • Magnolia dealbata Zuccarini (E Mexico) Sometimes treated as a subspecies, Magnolia macrophylla var. dealbata.
  • Magnolia macrophylla Michx. (SE US, E Mexico)
    • Magnolia macrophylla var. ashei (Weatherby) D. Johnson (SE US)[h]
    • Magnolia macrophylla var. macrophylla (SE US)
  • Magnolia rzedowskiana A.Vázquez, Domínguez-Yescas & R.Pedraza (Querétaro, Mexico)
  • Magnolia nuevoleonensis A.Vázquez & Domínguez-Yescas (Nuevo León, Mexico)
  • Magnolia vovidesii A.Vázquez, Domínguez-Yescas & L.Carvajal (Veracruz, Mexico)

Subgenus Yulania

Anthers open by splitting at the sides, deciduous, flowers mostly produced before leaves (except M. acuminata)

Section Yulania
M. liliiflora
Subsection Yulania
Subsection Tulipastrum
  • Magnolia acuminata (L.) L. (E North America)
    • Magnolia acuminata var. acuminata (E North America)
    • Magnolia acuminata var. subcordata (Spach) Dandy (SE US)
Section Michelia
Magnolia × alba
Subsection Michelia
Subsection Elmerrillia
  • Magnolia platyphylla (Merr.) Figlar & Noot. (Philippines)[22]
  • Magnolia pubescens (Merr.) Figlar & Noot. (Philippines)[23]
  • Magnolia sulawesiana Brambach, Noot. & Culmsee (Sulawesi)[24]
  • Magnolia tsiampacca (L.) Figlar & Noot. (Sumatra, Borneo, Sulawesi, Moluccas, New Guinea, Bismarck Archipelago)[25]
    • Magnolia tsiampacca subsp. mollis (Dandy) Figlar & Noot. (Sumatra, Borneo)[26]
    • Magnolia tsiampacca subsp. tsiampacca (Sulawesi, Moluccas, New Guinea, Bismarck Archipelago)[27]
      • Magnolia tsiampacca subsp. tsiampacca var. glaberrima (Dandy) Figlar & Noot. (New Guinea)[28]
      • Magnolia tsiampacca subsp. tsiampacca var. tsiampacca (Sulawesi, Moluccas, New Guinea, Bismarck Archipelago)
  • Magnolia vrieseana (Miq.) Baill. ex Pierre (Sulawesi, Moluccas)[29]
Subsection Maingola
Subsection Aromadendron

Subgenus Gynopodium

Section Gynopodium
Section Manglietiastrum

Uses

Flowering Magnolia figo 'Purple Queen'

Horticultural uses

Star magnolia from botanical gardens, Halifax, Nova Scotia
Star magnolia from botanical gardens, Halifax, Nova Scotia

In general, the genus Magnolia has attracted horticultural interest. Some, such as the shrub M. stellata (star magnolia) and the tree M. × soulangeana (saucer magnolia) flower quite early in the spring, before the leaves open. Others flower in late spring or early summer, including M. virginiana (sweetbay magnolia) and M. grandiflora (southern magnolia).

Hybridisation has been immensely successful in combining the best aspects of different species to give plants which flower at an earlier age than the parent species, as well as having more impressive flowers. One of the most popular garden magnolias, M. × soulangeana, is a hybrid of M. liliiflora and M. denudata.

In the eastern United States, five native species are frequently in cultivation: M. acuminata (as a shade tree), M. grandiflora, M. virginiana, M. tripetala, and M. macrophylla. The last two species must be planted where high winds are not a frequent problem because of the large size of their leaves.

Culinary uses

The flowers of many species are considered edible. In parts of England, the petals of M. grandiflora are pickled and used as a spicy condiment. In some Asian cuisines, the buds are pickled and used to flavor rice and scent tea. In Japan, the young leaves and flower buds of Magnolia hypoleuca are broiled and eaten as a vegetable. Older leaves are made into a powder and used as seasoning; dried, whole leaves are placed on a charcoal brazier and filled with miso, leeks, daikon, and shiitake, and broiled. There is a type of miso which is seasoned with magnolia, hoba miso.[30][31]

Traditional medicine

Magnolia tree in full bloom
Magnolia tree in Kenosha
Magnolia tree in the Fall.

The bark and flower buds of M. officinalis have long been used in traditional Chinese medicine, where they are known as hou po (厚朴). In Japan, kōboku, M. obovata, has been used in a similar manner.[32][33]

Timber

The cucumbertree, M. acuminata, grows to large size and is harvested as a timber tree in northeastern US forests. Its wood is sold as "yellow poplar" along with that of the tuliptree, Liriodendron tulipifera. The Fraser magnolia, M. fraseri, also attains enough size sometimes to be harvested, as well.

Other uses

Magnolias are used as food plants by the larvae of some Lepidoptera species, including the giant leopard moth.

Chemical compounds and bioeffects

The aromatic bark contains magnolol, honokiol, 4-O-methylhonokiol, and obovatol.[34][35][36][37][38][39] Magnolol[40] and honokiol[41] activate the nuclear receptor peroxisome proliferator-activated receptor gamma.

Culture

Symbols

Arts

Film and television

  • Paul Thomas Anderson created a movie titled Magnolia.
  • Steel Magnolias is a 1989 American comedy-drama film about the bond among a group of women from Louisiana, who can be as beautiful as magnolias, but are as tough as steel. The name 'magnolia' specifically refers to a magnolia tree about which they are arguing at the beginning.[42]
  • Sweet Magnolias is a 2020 Netflix Original Series

Music

Literature

Pastoral scene of the gallant south
The bulging eyes and the twisted mouth
Scent of magnolias, sweet and fresh,
Then the sudden smell of burning flesh.

Despite Meeropol's frequent mention of the South and magnolia trees, the horrific image which inspired his poem, Lawrence Beitler's 1930 photograph capturing the lynching of Thomas Shipp and Abram Smith following the robbery and murder of Claude Deteer, actually occurred in Marion, Indiana, where magnolia trees are less common.

  • In the 1960s, magnolias were a symbol of the South in the popular press: the New York Post noted of Lyndon Johnson that "A man who wore a ten-gallon Stetson and spoke with a magnolia accent had little hope of winning the Democratic nomination in 1960", and biographer Robert Caro picks up the symbol by saying that when Johnson became president "[t]he taint of magnolias still remained to be scrubbed off."[43]

Visual arts

Magnolia by Sarah Maloney

The Canadian artist, Sarah Maloney,[44] has created a series of sculptures of magnolia flowers in bronze and steel, entitled First Flowers,[45] in which she draws our attention to the dual symbols of beginnings in the flower, as both an evolutionary archetype and also one of the first trees to flower in spring (see illustration).

See also

Notes

  1. ^ The number of species in the genus Magnolia depends on the taxonomic view that one takes up. Recent molecular and morphological research shows that former genera Talauma, Dugandiodendron, Manglietia, Michelia, Elmerrillia, Kmeria, Parakmeria, Pachylarnax (and a small number of monospecific genera) all belong within the same genus, Magnolia s.l. (s.l. = sensu lato: 'in a broad sense', as opposed to s.s. = sensu stricto: 'in a narrow sense'). The genus Magnolia s.s. contains about 120 species. See the section Nomenclature and classification in this article.
  2. ^ Under the rule of priority, the first name that is validly published in Linnaeus' Species Plantarum (1 May 1753) or any other work of any other botanist after that, takes precedence over later names. Plumier's name was not a binomen and moreover published before Species Plantarum, so it has no status. The first binomen published after 1753 was Lamarck's Annona dodecapetala (1786). Magnolia plumieri (1788) was published on a later date by Schwartz, and is treated as a later synonym, as are Magnolia fatiscens (1817; Richard), Talauma caerulea (Jaume St-Hilaire 1805) and Magnolia linguifolia (1822).
  3. ^ Magnolia glauca has the same type specimen as Magnolia virginiana and as the latter is the first valid name, the species is now called Magnolia virginiana (sweetbay magnolia). Var. fœtida was renamed Magnolia grandiflora, which is legitimate as the epithet fœtida only has priority in its rank of variety. Magnolia grandiflora is the southern magnolia. Magnolia tripetala (umbrella magnolia) and Magnolia acuminata (cucumber tree) are still recognized as species.
  4. ^ Under these names the species were described by Desrousseaux in Lamarck's Encyclopédie Méthodique Botanique, tome troisieme (1792): 675. In the beginning of the 20th century, descriptions which seemed to represent the same species, were found in a work of the French naturalist P.J. Buc'hoz, Plantes nouvellement découvertes (1779), under the names Lassonia heptapeta and Lassonia quinquepeta. In 1934, the English botanist J.E. Dandy argued that these names had priority over the names by which both species had been known for over a century and hence from then on Magnolia denudata had to be named Magnolia heptapeta, Magnolia liliiflora should be changed into Magnolia quinquepeta. After a lengthy debate, specialist taxonomists decided that the Buc'hoz's names were based on chimaeras (pictures constructed of elements of different species), and as Buc'hoz did not cite or preserve herbarium specimens, his names were ruled not to be acceptable.
  5. ^ These species were published as Liriodendron coco and Liriodendron figo by J. de Loureiro in Flora Cochinchinensis (1790) and later (1817) transferred to Magnolia by A. P. de Candolle. Magnolia figo was soon after transferred to the genus Michelia.
  6. ^ In 1927 J.E. Dandy accepted 10 genera in The genera of Magnoliaceae, Kew Bulletin 1927: 257–264. In 1984 Law Yuh-Wu proposed 15 in A preliminary study on the taxonomy of the family Magnoliaceae, Acta Phytotaxonomica Sinica 22: 89–109; in 2004 even 16, in Magnolias of China. This is not just about grouping some genera together where others do not; authors often choose different boundaries.
  7. ^ Often treated as a distinct species, Magnolia pyramidata.
  8. ^ Often treated as a distinct species, Magnolia ashei.

References

  1. ^ "Magnolia Plum. ex L." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2022-03-25.
  2. ^ Peigler, Richard (1988). "A review of pollination of Magnolias by beetles, with a collecting survey made in the Carolinas" (PDF). Magnolia. 24 (45): 1–7. Archived (PDF) from the original on 2022-10-09.
  3. ^ Bernhardt, P. (2000). "Convergent evolution and adaptive radiation of beetle-pollinated angiosperms" (PDF). Plant Systematics and Evolution. 222 (1–4): 293–320. doi:10.1007/bf00984108. S2CID 25387251. Archived from the original (PDF) on 2015-12-23.
  4. ^ Crane, P.R. (1988). "The phylogenetic position and fossil history of the Magnoliaceae". In Hunt, David R. (ed.). Magnolias and their allies: Proceedings of an International Symposium, Royal Holloway, University of London, Egham, Surrey, U.K., 12-13 April 1996. Milbourne Port. p. 21. ISBN 978-0-9517234-8-7. OCLC 40781614.
  5. ^ Brickell, Christopher (2008). The Royal Horticultural Society A-Z encyclopedia of garden plants (3rd ed.). United Kingdom: Dorling Kindersley. p. 661. ISBN 978-1-4053-3296-5.
  6. ^ Richard B. Figlar. "Those Amazing Magnolia Fruits" (PDF). Magnoliasociety.org. Archived (PDF) from the original on 2022-10-09. Retrieved 2022-03-12.
  7. ^ Plumier, C. (1703) Nova plantarum Americanarum genera. Paris. [New genera of American plants].
  8. ^ Dillenius, J.J. (1732), Hortus Elthamensis, seu plantarum rariorum quas in horto suo Elthami in Cantio coluit vir ornamentissimus et praestantissimus Jacobus Sherard. London [The garden of Eltham, or rather about the rare plants that the most distinguished and prominent man Jacob Sherard grows in his garden in Eltham in Kent].
  9. ^ Catesby, M. (1730), The Natural History of Carolina, Florida and the Bahama Islands, containing the figures of birds, beasts, fishes, serpents, insects and plants, Vol. 1. London.
  10. ^ Lamarck, J.B.P.A. de (1786), Encyclopédie Méthodique Botanique, tome second: 127. Paris.
  11. ^ Magnolia kobus only received its name in 1814, when it was validly published by A.P. de Candolle. There has been much confusion about earlier attempts to validly publish this species, especially because descriptions and type specimens did not match.
  12. ^ Azuma, H.; Thien, L.B.; Kawano, S. (1999). "Molecular phylogeny of Magnolia (Magnoliaceae) inferred from cpDNA sequences and evolutionary divergence of the floral scents". Journal of Plant Research. 112 (1107): 291–306. doi:10.1007/pl00013885. S2CID 206862607.
  13. ^ Azuma, H.; García-Franco, J.G.; Rico-Gray, V.; Thien, L.B. (2001). "Molecular phylogeny of the Magnoliaceae: the biogeography of tropical and temperate disjunctions". American Journal of Botany. 88 (12): 2275–2285. doi:10.2307/3558389. JSTOR 3558389. PMID 21669660.
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Magnolia: Brief Summary

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Magnolia is a large genus of about 210 to 340 flowering plant species in the subfamily Magnolioideae of the family Magnoliaceae. It is named after French botanist Pierre Magnol.

Magnolia is an ancient genus. Appearing before bees evolved, the flowers are theorized to have evolved to encourage pollination by beetles. To avoid damage from pollinating beetles, the carpels of Magnolia flowers are extremely tough. Fossilized specimens of M. acuminata have been found dating to 20 million years ago, and fossils of plants identifiably belonging to the Magnoliaceae date to 95 million years ago. Another aspect of Magnolia considered to represent an ancestral state is that the flower bud is enclosed in a bract rather than in sepals; the perianth parts are undifferentiated and called tepals rather than distinct sepals and petals. Magnolia shares the tepal characteristic with several other flowering plants near the base of the flowering plant lineage such as Amborella and Nymphaea (as well as with many more recently derived plants such as Lilium).

The natural range of Magnolia species is a disjunct distribution, with a main center in east and southeast Asia and a secondary center in eastern North America, Central America, the West Indies, and some species in South America.

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