Rorippa columbiae

It is native to the western United States from central Washington to northeastern California, where it grows in moist to wet, sandy habitat types, such as playas (dry lakes). It is not a common plant; it is known from about fifteen occurrences in the Modoc Plateau region of California, it is a candidate for protection in Oregon, and it is state-listed as a threatened species in Washington.[http://www.northcoastcnps.org/cgi-bin/inv/inventory.cgi/Go?_id=rorippa_columbiae&sort=DEFAULT&search=Rorippa%20columbiae California Native Plant Society Rare Plant Profile]

Rorippa columbia is a perennial herb growing prostrate to erect, its densely hairy stems reaching 10 to 40 centimeters in maximum length.

The leaves are deeply lobed, the lobes sometimes cut all the way to the midrib. Lower leaves are borne on petioles; upper leaves have bases that clasp the stem.

The mustardlike flowers have small yellow petals. The fruit is a plump, hairy silique a few millimeters long containing many minute seeds.

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• [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?2240,2580,2582 Jepson Manual Treatment of Rorippa columbiae]
• [http://plants.usda.gov/java/profile?symbol=ROCO3 USDA Plants Profile for Rorippa columbiae]
• [http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250094610 Flora of North America: Rorippa columbiae]
• [http://biology.burke.washington.edu/herbarium/imagecollection.php?Genus=Rorippa&Species=columbiae Washington Burke Museum]
• [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Rorippa+columbiae Rorippa columbiae — U.C. Photo gallery]

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columbiae

Category:Flora of California

Category:Flora of Oregon

Category:Flora of Washington (state)

Category:Flora of the Great Basin

Category:Flora without expected TNC conservation status

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