| 词条 | Streptanthus batrachopus |
| 释义 |
|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.[1] 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.[2] Its habitat includes chaparral and coniferous forest, generally on serpentine soils. DescriptionIt 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 farther 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. References1. ^{{PLANTS|id=STBA4|taxon=Streptanthus batrachopus|accessdate=4 December 2015}} 2. ^The Nature Conservancy External links
5 : Streptanthus|Endemic flora of California|Endemic flora of the San Francisco Bay Area|Natural history of Marin County, California|Critically endangered flora of California |
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