Hemizonia

Taxobox
name = "Hemizonia"

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image_width = 240px
image_caption = Santa Susana Tarweed "Hemizonia minthornii"
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
subclassis = Asteridae
unranked_ordo = Euasterids II
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". Furthermore, "Hemizonia" is currently being revised; some species may be segregated into new genera. These tarweeds are native to southwestern North America, especially California.

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

elected species

* "Hemizonia arida" – Red Rock Tarweed
* "Hemizonia clementina" – Catalina Tarweed
* "Hemizonia congesta" – Hayfield Tarweed
* "Hemizonia conjugens" – Otay Tarweed
* "Hemizonia fitchii" – Fitch's Tarweed
* "Hemizonia floribunda" – Tecate Tarweed
* "Hemizonia frutescens"
* "Hemizonia greeneana"
* "Hemizonia kelloggii" – Kellogg's Tarweed
* "Hemizonia lobbii" – Threeray Tarweed
* "Hemizonia minthornii" – Santa Susana Tarweed
* "Hemizonia palmeri"
* "Hemizonia paniculata" – San Diego Tarweed
* "Hemizonia pungens" – Common Tarweed
* "Hemizonia streetsii"

External links

* [http://plants.usda.gov/java/profile?symbol=HEMIZ USDA Plants Profile]
* [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1326 Jepson Manual Treatment]