“Hemizonia”的意思、由来-开放百科全书

词条

Hemizonia

释义

Range
Description
Selected species
References
External links

{{italic title}}{{taxobox
|name = Hemizonia
|image = Hemizonia minthornii 3.jpg
|image_caption = Santa Susana Tarweed
Hemizonia minthornii
|regnum = Plantae
|unranked_divisio = Angiosperms
|unranked_classis = Eudicots
|unranked_ordo = Asterids
|ordo = Asterales
|familia = Asteraceae
|subfamilia = Asteroideae
|tribus = Heliantheae
|subtribus = Madiinae
|genus = Hemizonia
|genus_authority = DC
|subdivision_ranks = Species
|subdivision = About 25, see text.
|}}

Hemizonia is a genus of plants in the daisy family (Asteraceae). They are known generally as tarweeds, although some tarweeds belong to other genera, such as Madia and Deinandra. Furthermore, Hemizonia is currently being revised; some species may be segregated into new genera.

Range

The Hemizonia tarweeds are native to southwestern North America, especially California.

Description

Hemizonia are usually sticky, aromatic, yellow-flowered annual plants which are hardy and competitive, especially in the dry Mediterranean climate of California.

Selected species

Hemizonia arida — Red Rock Tarweed
Hemizonia clementina — Catalina Tarweed; Santa Catalina Island, Channel Islands
Hemizonia congesta — Hayfield Tarweed; Central Valley (California), California Coast Ranges, SW Oregon
Hemizonia conjugens—Deinandra conjugens — Otay Tarweed; Otay Mesa area, San Diego.
Hemizonia fasciculata—Deinandra fasciculata — Clustered Tarweed; Santa Monica Mountains.
Hemizonia fitchii — Fitch's Tarweed
Hemizonia floribunda — Tecate Tarweed
Hemizonia frutescens
Hemizonia greeneana
Hemizonia increscens—Deinandra increscens — Grassland Tarweed; coastal California and & Channel Islands
Hemizonia kelloggii — Kellogg's Tarweed
Hemizonia lobbii — Threeray Tarweed
Hemizonia minthornii—Deinandra minthornii — Santa Susana Tarweed; Simi Hills, Santa Susana Mountains, and Santa Monica Mountains chaparral. State and CNPS listed vulnerable species.
Hemizonia mohavensis—Deinandra mohavensis — Mojave Tarweed; west Mojave Desert, Transverse Ranges, northern Peninsular Ranges
Hemizonia palmeri
Hemizonia paniculata — San Diego Tarweed
Hemizonia pungens — Common Tarweed ^[1]
Hemizonia streetsii

References

1. ^Encyclopedia of Life: Information on Common Tarweed (Hemizonia pungens) . accessed 6.24.2012

External links

USDA Plants Profile: Hemizonia (Tarweeds)
Jepson Manual Treatment: Hemizonia
Encyclopedia of Life: Information on the Tarweeds (Hemizonia species)

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