Comments
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Inglês
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fornecido por eFloras
Pyrrocoma racemosa is generally recognized by its erect stems, tufted leaves, and few to many heads in elongate, racemiform or spiciform arrays. It is the most variable species of Pyrrocoma, with numerous named varieties and subspecies. R. A. Mayes (1976) suggested that P. racemosa is closely related to the small-headed, racemiform species P. uniflora, P. apargioides, and P. lucida. The varieties are intergrading, making them somewhat difficult to identify.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Inglês
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fornecido por eFloras
Plants 20–75 cm. Stems 2–5, erect or strongly ascending, brownish to red-tinged, bases often curved, sparsely to moderately leafy, usually glabrous, sometimes sparsely tomentulose or villous, eglandular. Leaves: basal (tufted) petiolate, blades lanceolate or oblanceolate to elliptic, 50–200(–300) × 4–30 mm, margins spinulose-serrate to entire or undulate, ciliate, apices acute, sometimes recurved; cauline sessile, blades lanceolate, 10–40 × 2–4 mm, reduced distally; faces usually glabrous, sometimes villous. Heads (1–)3–15+ in spiciform, racemiform, or narrowly paniculiform arrays. Peduncles 0–2 cm. Involucres hemispheric to campanulate, 5–15 × 5–18 mm. Phyllaries in 4–5 series, lanceolate to oblanceolate or oblong, 6–13 mm, strongly unequal, margins sometimes ciliate, apices green, obtuse or acute, sometimes recurved, faces glabrous, sparsely tomentulose, or densely villous. Ray florets 7–28; corollas 5–12 mm. Disc florets 20–65; corollas 5–8 mm. Cypselae subcylindric, 2.5–5.5 mm, 4-angled, faces often sericeous or nearly glabrous; pappi tawny, 6.5–8.5 mm.
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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
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fornecido por eFloras
Homopappus racemosus Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 332. 1840; Haplopappus racemosus (Nuttall) Torrey
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Pyrrocoma racemosa
(
Inglês
)
fornecido por wikipedia EN
Pyrrocoma racemosa is a species of flowering plant in the family Asteraceae known by the common name clustered goldenweed.[1] It is native to the western United States, where it grows in many types of habitat. It is quite variable in morphology, and there are several varieties which are sometimes hard to tell apart. In general, it is a perennial herb usually producing two or more mostly erect stems reaching maximum heights between 15 and 90 centimeters. The stems are reddish or brownish in color, leafy or not, and hairless to quite woolly. The longest leaves are located in tufts around the base of the stems. They are lance-shaped to oval, smooth-edged, wavy, or deeply spine-toothed, and may exceed 30 centimeters in length. Basal leaves are borne on woolly petioles. Leaves located higher on the stem lack petioles and may clasp the stem at their bases. The inflorescence is a cluster of several flower heads lined with phyllaries which may be over a centimeter long and are hairy to hairless in texture. Each head contains many yellow disc florets and a fringe of several yellow ray florets. The fruit is an achene which may be over a centimeter long including its pappus.
References
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^ USDA, NRCS (n.d.). "Pyrrocoma racemosa". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 16 October 2015.
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Pyrrocoma racemosa: Brief Summary
(
Inglês
)
fornecido por wikipedia EN
Pyrrocoma racemosa is a species of flowering plant in the family Asteraceae known by the common name clustered goldenweed. It is native to the western United States, where it grows in many types of habitat. It is quite variable in morphology, and there are several varieties which are sometimes hard to tell apart. In general, it is a perennial herb usually producing two or more mostly erect stems reaching maximum heights between 15 and 90 centimeters. The stems are reddish or brownish in color, leafy or not, and hairless to quite woolly. The longest leaves are located in tufts around the base of the stems. They are lance-shaped to oval, smooth-edged, wavy, or deeply spine-toothed, and may exceed 30 centimeters in length. Basal leaves are borne on woolly petioles. Leaves located higher on the stem lack petioles and may clasp the stem at their bases. The inflorescence is a cluster of several flower heads lined with phyllaries which may be over a centimeter long and are hairy to hairless in texture. Each head contains many yellow disc florets and a fringe of several yellow ray florets. The fruit is an achene which may be over a centimeter long including its pappus.
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- cc-by-sa-3.0
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- Wikipedia authors and editors
Pyrrocoma racemosa
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Vietnamita
)
fornecido por wikipedia VI
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Pyrrocoma racemosa: Brief Summary
(
Vietnamita
)
fornecido por wikipedia VI
Pyrrocoma racemosa là một loài thực vật có hoa trong họ Cúc. Loài này được (Nutt.) Torr. & A.Gray miêu tả khoa học đầu tiên năm 1842.
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- Wikipedia tác giả và biên tập viên