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Rush Bristleweed

Xanthisma junceum (Greene) D. R. Morgan & R. L. Hartman

Comments

provided by eFloras
Xanthisma junceum is reported from Arizona, but no specimen has been seen; as it is coastal in distribution, the report is likely based on a misidentified specimen.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 384,390 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Description

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Subshrubs, 25–100 cm; caudices branched, taproots 2–10+ cm. Stems 3–15+, branched in distal 1 / 2 , slender and wiry, glabrous. Leaves: basal often withering by flowering, 20–35 × 6–12 mm, pinnatifid; cauline evenly spaced, blades oblong to linear, scalelike, 4–6 × 1–2 mm (except proximalmost), markedly reduced distally, margins usually entire, faces glabrous. Peduncles minutely glandular, if stipitate, then minutely so; bracts 5–25, imbricate, grading into phyllaries. Involucres hemispheric (narrowed at bases), 0.5–0.8 × 1–1.2 cm. Phyllaries in 5–6 series, oblong to linear-oblanceolate, 1.5–6.5 mm, apices acute, tipped by white bristle, faces minutely stipitate-glandular. Ray florets 15–25; corollas yellow, tubes 3.5–4 mm, laminae 5–6 × 1.5–2.5 mm. Disc florets 25–40+; corollas 4.8–6.3 mm. Cypselae narrowly obovoid to oblanceoloid, 1.5–2.5 mm, nerves 12–18, moderately tawny hairy; pappi tawny, 3.5–6 mm, a few abaxial bristles to 1 / 3 of longest. 2n = 8, 16.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 384,390 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
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eFloras

Synonym

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Haplopappus junceus Greene, Bull. Calif. Acad. Sci. 1: 190. 1885; Machaeranthera juncea (Greene) Shinners
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 384,390 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Xanthisma junceum

provided by wikipedia EN

Xanthisma junceum is a species of flowering plant in the family Asteraceae known by the common names rush bristleweed or rush-like bristleweed. It is native to northern Mexico and it occurs in the United States only as far north as San Diego County, California. It grows in coastal and inland slopes and canyons. It is a perennial herb growing erect to 1 m in height. The linear leaves are mostly located at the base of the plant, each 1–2 cm long and toothed or cut into bristle-tipped lobes. The inflorescence bears one or more flower heads lined with glandular, bristle-tipped phyllaries. The head has a center of many yellow disc florets and a fringe of 15 to 25 yellow ray florets each about 1/2 cm long. The fruit is a hairy achene 2–3 mm long tipped with a pappus.

References

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Xanthisma junceum: Brief Summary

provided by wikipedia EN

Xanthisma junceum is a species of flowering plant in the family Asteraceae known by the common names rush bristleweed or rush-like bristleweed. It is native to northern Mexico and it occurs in the United States only as far north as San Diego County, California. It grows in coastal and inland slopes and canyons. It is a perennial herb growing erect to 1 m in height. The linear leaves are mostly located at the base of the plant, each 1–2 cm long and toothed or cut into bristle-tipped lobes. The inflorescence bears one or more flower heads lined with glandular, bristle-tipped phyllaries. The head has a center of many yellow disc florets and a fringe of 15 to 25 yellow ray florets each about 1/2 cm long. The fruit is a hairy achene 2–3 mm long tipped with a pappus.

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Xanthisma junceum ( Vietnamese )

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Xanthisma junceum là một loài thực vật có hoa trong họ Cúc. Loài này được (Greene) D.R.Morgan & R.L.Hartm. mô tả khoa học đầu tiên năm 2003.[1]

Chú thích

  1. ^ The Plant List (2010). Xanthisma junceum. Truy cập ngày 4 tháng 6 năm 2013.

Liên kết ngoài

 src= Wikimedia Commons có thư viện hình ảnh và phương tiện truyền tải về Xanthisma junceum  src= Wikispecies có thông tin sinh học về Xanthisma junceum


Hình tượng sơ khai Bài viết tông cúc Astereae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
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Wikipedia tác giả và biên tập viên
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wikipedia VI

Xanthisma junceum: Brief Summary ( Vietnamese )

provided by wikipedia VI

Xanthisma junceum là một loài thực vật có hoa trong họ Cúc. Loài này được (Greene) D.R.Morgan & R.L.Hartm. mô tả khoa học đầu tiên năm 2003.

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cc-by-sa-3.0
copyright
Wikipedia tác giả và biên tập viên
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wikipedia VI