Streptanthus batrachopus
{{Short description|Species of flowering plant}}
{{Speciesbox
|status = G1
|status_system = TNC
|genus = Streptanthus
|species = batrachopus
|authority = J.L.Morrison
}}
Streptanthus batrachopus is a rare species of flowering plant in the mustard family known by the common name Mt. Tamalpais jewelflower.{{PLANTS|id=STBA4|taxon=Streptanthus batrachopus|accessdate=4 December 2015}} It is endemic to Marin County, California, where it is known only from Mt. Tamalpais and surrounding terrain. There are fewer than ten known occurrences.[http://www.natureserve.org/explorer/servlet/NatureServe?searchName=Streptanthus+batrachopus The Nature Conservancy]
Its habitat includes chaparral and coniferous forest, generally on serpentine soils.
Description
It is an annual herb producing a branching or unbranched stem up to about 20 centimeters in maximum height or slightly taller. Leaves near the base of the stem are oval or lance-shaped with toothed edges, somewhat fleshy in texture with a mottled pattern, and no more than 2 to 3 centimeters long. Leaves higher up the stem are lance-shaped.
Flowers occur at intervals along the upper stem. Each has an urn-shaped calyx of purple or greenish sepals up to half a centimeter long. Purple or purple-streaked white petals emerge from the tip. The fruit is a straight or curving silique up to 3 centimeters in length.
References
{{reflist}}
External links
- [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?2240,2621,2627 Jepson Manual Treatment]
- [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Streptanthus+batrachopus Photo gallery]
{{Taxonbar|from=Q7623307}}
Category:Endemic flora of California
Category:Endemic flora of the San Francisco Bay Area
Category:Natural history of Marin County, California
Category:Critically endangered flora of California
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