Comments
(
Inglês
)
fornecido por eFloras
The geographic patterns of morphologic variability as well as both chloroplast and nuclear DNA markers in Microseris douglasii have been studied by K. Bachmann and J. Battjes (1994) and D. Roelofs and K. Bachmann (1997). Four chloroplast types were identified, two of which were derived by introgression from M. bigelovii or its ancestor. Plants in nature are highly inbred and genetically homozygous, as proposed earlier by K. L. Chambers (1955). Subspecies platycarpha stands well apart in these studies; subsp. tenella is not differentiated molecularly from subsp. douglasii.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
(
Inglês
)
fornecido por eFloras
Annuals, 5–40 cm; taprooted. Leaves basal. petiolate. blades linear to oblanceolate, 3–25 cm, margins entire, dentate, or pinnately lobed (lobes slender, tapering), apices acute to acuminate. faces ± scurfy-puberulent. Peduncles erect or curved-ascending. ebracteate. Involucres globose to fusiform in fruit, 7–16 mm. Phyllaries: apices erect. acute to acuminate; outer deltate, glabrous or lightly scurfy-puberulent; inner lanceolate, faces often lightly black-villous on margins (midveins often purple-lined, thickened). Florets 5–200; corollas yellow or white, equaling or surpassing phyllaries by 1–3 mm. Cypselae columnar or obconic, 3–10 mm; pappi of (0–)1. 5, white to yellow, brown, or blackish, aristate scales 0.5–7 mm (± arcuate, usually distinctly involute, except subsp. tenella, often abaxially villous, midveins usually tapering distally from thick bases, except subsp. tenella, widths less than 1/5 bodies). aristae (white or straw-colored, ± stout) barbellate. 2n = 18.
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- cc-by-nc-sa-3.0
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
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Inglês
)
fornecido por eFloras
Calaïs douglasii de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 85. 1838
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Microseris douglasii
(
Inglês
)
fornecido por wikipedia EN
Microseris douglasii is a species of flowering plant in the family Asteraceae known by the common name Douglas' silverpuffs. It is native to western North America from Oregon and California to Baja California. It grows in several types of habitat, including grassland and vernal pools, and on soils containing clay and serpentine.
Description
Microseris douglasii is plant is variable in appearance. In general it is an annual herb growing 5 centimeters to over half a meter tall from a basal rosette of leaves; there is usually no true stem. Each leaf is up to 25 centimeters long and has edges which are smooth, toothed, or divided into many lobes.
The inflorescence is borne on an erect or curving peduncle arising from ground level. The flower head contains up to 200 white or yellow ray florets. The fruit is an achene with a brown to nearly black, sometimes speckled body up to a centimeter long. At the tip of the body is a large pappus made up of about five long, bristly, barbed scales.
See also
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Microseris douglasii: Brief Summary
(
Inglês
)
fornecido por wikipedia EN
Microseris douglasii is a species of flowering plant in the family Asteraceae known by the common name Douglas' silverpuffs. It is native to western North America from Oregon and California to Baja California. It grows in several types of habitat, including grassland and vernal pools, and on soils containing clay and serpentine.
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- cc-by-sa-3.0
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- Wikipedia authors and editors
Microseris douglasii
(
Vietnamita
)
fornecido por wikipedia VI
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Microseris douglasii: Brief Summary
(
Vietnamita
)
fornecido por wikipedia VI
Microseris douglasii là một loài thực vật có hoa trong họ Cúc. Loài này được (DC.) Sch.Bip. mô tả khoa học đầu tiên năm 1866.
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- cc-by-sa-3.0
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- Wikipedia tác giả và biên tập viên
