Comments
(
Inglês
)
fornecido por eFloras
Cirsium ownbeyi is endemic to the eastern side of the Uintah Mountains in northeastern Utah, southwestern Wyoming, and northwestern Colorado. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Inglês
)
fornecido por eFloras
Perennials, 30–70 cm; taproots and branched caudices with persistent dark-brown leaf bases. Stems 1–several, erect, simple or sparingly branched in distal 1/2, glabrous or thinly arachnoid and sparingly villous with jointed trichomes. Leaves: blades oblong to elliptic or oblanceolate, 15–30+ × 2–7 cm, deeply 2–3-pinnately divided, lobes linear to linear-lanceolate, spinulose to spiny-dentate or shallowly lobed, main spines slender, 2–8 mm, abaxial faces glabrous to thinly tomentose and villous along major veins, soon glabrescent, adaxial glabrous; basal present at flowering, narrowly spiny winged-petiolate; principal cauline well distributed, proximal winged-petiolate, mid and distal sessile, gradually reduced, bases decurrent as spiny wings 1–3 cm; distalmost reduced to spiny-pectinate bracts. Heads 1–few, erect, ± crowded in corymbiform arrays. Peduncles 0–4 cm. Involucres ovoid, 1.8–2.5 cm, 1.5–2.5 cm diam., loosely arachnoid, glabrate. Phyllaries in 5–6 series, imbricate, green, linear-lanceolate, abaxial faces without or with poorly developed glutinous ridge; outer and mid bases appressed, apices stiffly radiating to ascending, long, very narrow, entire, spines slender, 3–10 mm; apices of inner straight, flexuous. Corollas white to pink or pink-purple, 16–20 mm, tubes 6–8 mm, throats 5–6 mm, lobes 5–7 mm; style tips 3.5–4.5 mm. Cypselae brown, ca. 4 mm, apical collars not differentiated; pappi 13–17 mm.
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- cc-by-nc-sa-3.0
- direitos autorais
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Cirsium ownbeyi
(
Inglês
)
fornecido por wikipedia EN
Cirsium ownbeyi, or Ownbey's thistle, is a rare North American species of flowering plant in the family Asteraceaey. It is endemic to the United States, where it has a narrow distribution in northeast Utah, southwest Wyoming, and northwest Colorado. There are around 30 known populations with a total of approximately 25,000 individuals.[1][2]
Description
Cirsium ownbeyi is a perennial herb growing 30 to 70 centimeters (12-28 inches) tall from a taproot and branched caudex. There are one or more erect stems. The leaves are up to 30 centimeters (12 inches) long. The flower heads are oval and up to 2.5 centimeters (1 inch) long and wide. They are coated in green phyllaries with spines up to a centimeter long. The head contains white, pink, or purplish flowers up to 2 centimeters long. Blooming occurs in June through August. The fruit may be 2 centimeters long including its long pappus.[3][4]
Habitat
This plant grows in sagebrush, juniper-dominated habitat, and riparian zones. The substrate is usually sandstone, but sometimes limestone.[5]
Conservation
This species grows in Dinosaur National Monument, where it is threatened by disturbance caused by park visitors.[1][5] It is also threatened by the seed-eating weevil Rhinocyllus conicus, which was introduced to the area as an agent of biological pest control against musk thistle {Carduus nutans).[5]
References
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- cc-by-sa-3.0
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- Wikipedia authors and editors
Cirsium ownbeyi: Brief Summary
(
Inglês
)
fornecido por wikipedia EN
Cirsium ownbeyi, or Ownbey's thistle, is a rare North American species of flowering plant in the family Asteraceaey. It is endemic to the United States, where it has a narrow distribution in northeast Utah, southwest Wyoming, and northwest Colorado. There are around 30 known populations with a total of approximately 25,000 individuals.
- licença
- cc-by-sa-3.0
- direitos autorais
- Wikipedia authors and editors
Cirsium ownbeyi
(
Vietnamita
)
fornecido por wikipedia VI
- licença
- cc-by-sa-3.0
- direitos autorais
- Wikipedia tác giả và biên tập viên
Cirsium ownbeyi: Brief Summary
(
Vietnamita
)
fornecido por wikipedia VI
Cirsium ownbeyi là một loài thực vật có hoa trong họ Cúc. Loài này được S.L.Welsh mô tả khoa học đầu tiên năm 1982.
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- cc-by-sa-3.0
- direitos autorais
- Wikipedia tác giả và biên tập viên
