Comments
(
Inglês
)
fornecido por eFloras
Agoseris retrorsa appears to be most closely related to A. grandiflora. It superficially resembles A. parviflora and the two are sometimes confused. Agoseris retrorsa occurs primarily west of the Sierra Nevada; A. parviflora occurs primarily east of the same range. Cypsela characteristics will quickly separate them. Putative hybrids between A. retrorsa and A. grandiflora, A. hirsuta, and A. parviflora have been identified.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
(
Inglês
)
fornecido por eFloras
Stems 0. Leaves erect to ascending; petioles often purplish; blades linear to linear-elliptic, (7–)10–30(–36) cm, margins usually lobed to pinnatifid, rarely toothed or entire, lobes (4–)7–9(–11) pairs, linear to lanceolate, mostly retrorse, sometimes spreading, lobules often present, faces sparsely villous to tomentose. Peduncles elongating after flowering, 15–65(–94) cm in fruit, ± glabrate, or apically villous to tomentose, eglandular. Involucres cylindric to obconic or campanulate, 4–6 cm in fruit. Phyllaries in 3–5 series, medially rosy purple or all green, lacking darker spots or midstripes, margins ciliate to tomentose, faces glabrous or villous, eglandular; outer erect to spreading, adaxially glabrous or tomentose; inner erect, often precociously elongating and much surpassing outer. Receptacles epaleate. Florets 10–100; corollas yellow, tubes 8–20 mm, ligules 6–15 × 1.5–2.5 mm; anthers 2–5 mm. Cypselae (15–)20–31 mm, bodies narrowly obconic, 5–7 mm, beaks (10–)15–25 mm, lengths mostly 3–4 times bodies; ribs strongly ridged, straight, often minutely cinereous-pannose; pappus bristles in 4–6 series, (11–)15–20 mm. 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
(
Inglês
)
fornecido por eFloras
Macrorhynchus retrorsus Bentham, Pl. Hartw., 320. 1849; M. angustifolius Kellogg
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Agoseris retrorsa
(
Inglês
)
fornecido por wikipedia EN
Agoseris retrorsa is a North American species of flowering plant in the family Asteraceae known by the common name spearleaf agoseris or spearleaf mountain dandelion.[2]
It is native to western North America from Washington to Utah to Baja California, where it grows in many types of habitat, including chaparral, scrub, and coniferous forest.[3][4]
Description
Agoseris retrorsa is a perennial herb forming a base of leaves about a number of erect, thick, wool-coated inflorescences up to half a meter in height. The narrow leaves are linear to lance-shaped, and spearlike with curving toothlike lobes along the edges.[2]
The inflorescence bears a single flower head which is several centimeters wide when fully open. It is lined with woolly, pointed phyllaries which are green, often with reddish purple longitudinal streaks or stripes. The flower head contains many golden yellow ray florets, the outer ones usually darker in color.[2]
The fruit is an achene with a plumelike pappus of white bristles.[2]
References
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- Wikipedia authors and editors
Agoseris retrorsa: Brief Summary
(
Inglês
)
fornecido por wikipedia EN
Agoseris retrorsa is a North American species of flowering plant in the family Asteraceae known by the common name spearleaf agoseris or spearleaf mountain dandelion.
It is native to western North America from Washington to Utah to Baja California, where it grows in many types of habitat, including chaparral, scrub, and coniferous forest.
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- cc-by-sa-3.0
- direitos autorais
- Wikipedia authors and editors
Agoseris retrorsa
(
Vietnamita
)
fornecido por wikipedia VI
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- Wikipedia tác giả và biên tập viên
Agoseris retrorsa: Brief Summary
(
Vietnamita
)
fornecido por wikipedia VI
Agoseris retrorsa là một loài thực vật có hoa trong họ Cúc. Loài này được (Benth.) Greene mô tả khoa học đầu tiên năm 1891.
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- cc-by-sa-3.0
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- Wikipedia tác giả và biên tập viên
