| 词条 | Streptanthus hispidus |
| 释义 |
|image = |status = G1 |status_system = TNC |genus = Streptanthus |species = hispidus |authority = A.Gray }} Streptanthus hispidus, the Mt. Diablo jewelflower,[1] is a rare species of flowering plant in the mustard family. DistributionIt is endemic to Contra Costa County, California, where it is known from fewer than 15 occurrences on and around Mount Diablo. It grows in rocky outcrops in grassland and chaparral habitat. It is threatened by habitat degradation, such as trampling by hikers and destruction during maintenance activities.[2] DescriptionStreptanthus hispidus is a bristly annual herb growing up to 30 centimeters tall. Flowers occur in a raceme, the uppermost ones often sterile and different in form. The bristly bell-shaped calyx of sepals is greenish brown in the fertile flowers and purple in the sterile. Fertile flowers have four light purple petals up to a centimeter long. The fruit is a bristly silique up to 8 centimeters in length. References1. ^{{PLANTS|id=STHI2|taxon=Streptanthus hispidus|accessdate=4 December 2015}} 2. ^The Nature Conservancy External links
8 : Streptanthus|Endemic flora of California|Mount Diablo|Natural history of the California chaparral and woodlands|Natural history of the California Coast Ranges|Natural history of Contra Costa County, California|Endemic flora of the San Francisco Bay Area|Critically endangered flora of California |
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