dcsimg

Description ( anglais )

fourni par eFloras
Leaf blades 50–175+ × 2–8(–12+) mm. Involucres hemispheric to ± urceolate or globose, 3.5–12 × 3–8+ mm. Ray laminae 5–12 mm. Disc corollas 2.5–3.5 mm. Cypselae black, 2–3.5 mm.
licence
cc-by-nc-sa-3.0
droit d’auteur
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
citation bibliographique
Flora of North America Vol. 21: 289, 291, 292 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
rédacteur
Flora of North America Editorial Committee
projet
eFloras.org
original
visiter la source
site partenaire
eFloras

Brief Summary ( anglais )

fourni par EOL authors
Hemizonia congesta is a wildflower native to parts of California as well as southwestern Oregon. In California it occurs in the North Coast Ranges, west and central California Central Valley and central western California.

With a common name of Hayfield tarweed, this annual species attains a height between 10 and 80 centimeters. Stems are simple below, but branched above. The leaves are typically linear to narrowly elliptic, entire to sparsely dentate. Inflorescences feature heads that are solitary or occurring in small groups.

Hemizonia congesta ( anglais )

fourni par wikipedia EN

Hemizonia congesta ssp. luzulifolia, Estero Bluffs State Park.

Hemizonia congesta, known by the common name hayfield tarweed, is a species of flowering plant in the family Asteraceae, native to western North America.

Description

Hemizonia congesta is a spindly, thin-stemmed annual herb growing erect to 10–80 centimetres (3.9–31.5 in) in height. Like other tarweeds the stem and foliage are glandular and have an odor reminiscent of tar. Most of the long, narrow, pointed leaves are located on the lower portion of the stem below the branching flower stalks.

The inflorescences are covered in glandular hairs and hold daisy-like flower heads. Each head has a center of yellowish dark-tipped disc florets and a fringe of bright yellow to white ray florets, often with purplish striping on the undersides. The ray florets are toothed or lobed on the tips, with the middle tooth thinner than the others.

Subspecies

There are many Hemizonia congesta subspecies, which can vary in appearance. They include:

  • Hemizonia congesta subsp. calyculata — Mendocino tarplant [1]
  • Hemizonia congesta subsp. clevelandii [2]
  • Hemizonia congesta subsp. congesta [3]
  • Hemizonia congesta subsp. leucocephala — hayfield tarplant [4]
  • Hemizonia congesta subsp. luzulifolia [5]
  • Hemizonia congesta subsp. tracyi — Tracy's tarplant [6]

Distribution and habitat

Hemizonia congesta is native to California and Oregon, where it is a common member of the flora of a number of habitats, particularly in grasslands and fields.[7] It is a native plant in the Central Valley (California), and the California Coast Ranges.

See also

References

licence
cc-by-sa-3.0
droit d’auteur
Wikipedia authors and editors
original
visiter la source
site partenaire
wikipedia EN

Hemizonia congesta: Brief Summary ( anglais )

fourni par wikipedia EN
Hemizonia congesta ssp. luzulifolia, Estero Bluffs State Park.

Hemizonia congesta, known by the common name hayfield tarweed, is a species of flowering plant in the family Asteraceae, native to western North America.

licence
cc-by-sa-3.0
droit d’auteur
Wikipedia authors and editors
original
visiter la source
site partenaire
wikipedia EN

Hemizonia congesta ( vietnamien )

fourni par wikipedia VI

Hemizonia congesta là một loài thực vật có hoa trong họ Cúc. Loài này được DC. mô tả khoa học đầu tiên năm 1836.[1]

Chú thích

  1. ^ The Plant List (2010). Hemizonia congesta. 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 Hemizonia congesta  src= Wikispecies có thông tin sinh học về Hemizonia congesta


Bài viết về chủ đề Phân họ Cúc này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
licence
cc-by-sa-3.0
droit d’auteur
Wikipedia tác giả và biên tập viên
original
visiter la source
site partenaire
wikipedia VI

Hemizonia congesta: Brief Summary ( vietnamien )

fourni par wikipedia VI

Hemizonia congesta là một loài thực vật có hoa trong họ Cúc. Loài này được DC. mô tả khoa học đầu tiên năm 1836.

licence
cc-by-sa-3.0
droit d’auteur
Wikipedia tác giả và biên tập viên
original
visiter la source
site partenaire
wikipedia VI