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Derivation of specific name

provided by Flora of Zimbabwe
raddianum: named after Guiseppe Raddi (1770-1829), Italian botanist who collected in Brazil from where the type originates.
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Adiantum raddianum C.Presl Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101050
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Mark Hyde
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Bart Wursten
author
Petra Ballings
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Flora of Zimbabwe

Description

provided by Flora of Zimbabwe
Rhizome short, creeping; rhizome scales brown, lanceolate, entire. Fronds closely spaced to tufted, thinly herbaceous, arching. Stipe up to 25 cm long, thin, shiny, dark brown to black, glabrous. Lamina 3-4 pinnate, triangular to broadly ovate in outline, 10-25 × 8-15 cm, glabrous. Rhachis and stalks black, glabrous. Pinnules persistent, 1.2 × 1 cm, obcuneate to trapeziform with straight sides, outer margin irregularly incised into rounded lobes with toothed margins, veins ending in the sinuses of the marginal serrations. Sori on the outer margins of ultimate segments, indusial flaps broadly overlapping the sori, kidney shaped to circular, c. 1.5 mm in diameter.
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Adiantum raddianum C.Presl Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101050
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
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Flora of Zimbabwe

Worldwide distribution

provided by Flora of Zimbabwe
Native to South America, widely escaped throughout the moister regions of Africa.
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Adiantum raddianum C.Presl Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101050
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
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Flora of Zimbabwe

Comprehensive Description

provided by Smithsonian Contributions to Botany
Adiantum raddianum Presl

Adianthum raddianum Presl, Tent. Pterid. 158, 1836.—Tryon, Contr. Gray Herb. 144:169, 1964.—Hoshizaki, Baileya 17:134, 1970.

Adiantum cuneatum Langsdorff & Fischer, Ic. Fil. 23, t. 26, 1810.—Fosberg, Bull. Torr. Bot. Cl. 70:387, 1943; Occ. Pap. Bishop Mus. 24:11, 1969 [non A. cuneatum Forster, Prodr. 84, 1786].

According to Hoshizaki this is the plant commonly known in cultivation as A. cuneatum, and undoubtedly the plant widely escaped and naturalized in the Hawaiian Islands. Her illustration shows precisely the pinnule shape and the veins terminating in the sinuses between the lobes on sterile portions of the distal margins of the pinnules shown by the plant introduced in Hawaii. There are numerous horticultural varieties of this species, some of which are illustrated by Mrs. Hoshizaki.

Tryon was apparently the first to indicate that A. raddianum Presl is the earliest available name for this species, since A. cuneatum is antedated by A. cuneatum Forster. We may further point out that A. cuneatum Langsdorff & Fischer and A. raddianum Presl are nomenclaturally equivalent, as the latter is based on a supposed A. cuneatum Raddi (1825: [59, 100] pl. 78, 2a, b). Raddi was merely using Langsdorff’s and Fischer’s name, though ascribing it to Willdenow (1810:450). Willdenow merely included A. cuneatum Langsdorff & Fischer in his account of the genus. Raddi’s illustration, though not showing venation, seems clearly to apply to the plant described by Langsdorff and Fischer.

Carex L.
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bibliographic citation
Fosberg, F. Raymond and Sachet, Marie-Hélène. 1975. "Polynesian Plant Studies 1-5." Smithsonian Contributions to Botany. 1-25. https://doi.org/10.5479/si.0081024X.21

Adiantum raddianum

provided by wikipedia EN

Adiantum raddianum, the Delta maidenhair fern, is one of the most popular ferns to grow indoors.[3] It is native to South America and its common name comes from its shiny, dark leafstalks that resemble human hair.[4] It typically grows about 17–19 in (43–48 cm) tall and up to 22 in (56 cm) wide.[5] In the wild, it is found on forest floors, rock crevices, river banks, coastal cliffs, and basalt banks along trails and streams.[6] The triangular fronds are semi-erect in the beginning then droop gracefully as they age and can be up to 12 inches (30 cm)[7] long by 6 inches (15 cm) wide. The genus name Adiantum comes from the Greek word "adiantos", meaning "unwetted" (in reference to the leaves).[5]

This plant is hardy down to 5 °C (41 °F), so must be grown indoors in temperate regions. However it may be placed outside in a sheltered spot during the summer months.[8] It requires high humidity, well-drained soil, bright indirect light, and a fairly constant temperature.[3] It prefers neutral or slightly alkaline soil and is suitable for USDA hardiness zones 10 and 11.[9] It can be susceptible to scale and mealybug.[4] The cultivars ‘Brilliantelse’ and ‘Kensington Gem’ have won the Royal Horticultural Society's Award of Garden Merit.[8][10]

A. raddianum is sometimes considered invasive in Hawaii and French Polynesia.[6]

Gallery

References

  1. ^ "NatureServe Explorer". Retrieved 2021-03-31.
  2. ^ "Adiantum raddianum C.Presl". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. 2017. Retrieved 21 December 2020.
  3. ^ a b Adiantum raddianum, Missouri Botanical Garden.
  4. ^ a b "Delta Maidenhair Fern - Adiantum Raddianum - Indoor Care And Description". www.houseplantsexpert.com. Retrieved 2021-03-31.
  5. ^ a b "Maidenhair Fern: How To Grow and Care For Adiantum Raddianum". Plant Care Today. 2020-05-17. Retrieved 2021-03-31.
  6. ^ a b "Adiantum raddianum (delta maidenhair fern)". CABI Invasive Species Compendium. November 20, 2019. Archived from the original on 2015-03-02. Retrieved March 31, 2021.
  7. ^ Adiantum raddianum, NC Cooperative Extension.
  8. ^ a b "Adiantum raddianum". Royal Horticultural Society. Retrieved 3 January 2018.
  9. ^ "Adiantum raddianum (Delta Maidenhair)". Gardenia.net. Retrieved 2021-03-31.
  10. ^ "AGM Plants - Ornamental" (PDF). RHS. 2017. Retrieved 3 January 2018.

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Wikipedia authors and editors
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Adiantum raddianum: Brief Summary

provided by wikipedia EN

Adiantum raddianum, the Delta maidenhair fern, is one of the most popular ferns to grow indoors. It is native to South America and its common name comes from its shiny, dark leafstalks that resemble human hair. It typically grows about 17–19 in (43–48 cm) tall and up to 22 in (56 cm) wide. In the wild, it is found on forest floors, rock crevices, river banks, coastal cliffs, and basalt banks along trails and streams. The triangular fronds are semi-erect in the beginning then droop gracefully as they age and can be up to 12 inches (30 cm) long by 6 inches (15 cm) wide. The genus name Adiantum comes from the Greek word "adiantos", meaning "unwetted" (in reference to the leaves).

This plant is hardy down to 5 °C (41 °F), so must be grown indoors in temperate regions. However it may be placed outside in a sheltered spot during the summer months. It requires high humidity, well-drained soil, bright indirect light, and a fairly constant temperature. It prefers neutral or slightly alkaline soil and is suitable for USDA hardiness zones 10 and 11. It can be susceptible to scale and mealybug. The cultivars ‘Brilliantelse’ and ‘Kensington Gem’ have won the Royal Horticultural Society's Award of Garden Merit.

A. raddianum is sometimes considered invasive in Hawaii and French Polynesia.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
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wikipedia EN