| 词条 | Streptanthus callistus |
| 释义 |
|status = G1 |status_system = TNC |genus = Streptanthus |species = callistus |authority = J.L.Morrison }} Streptanthus callistus is a rare species of flowering plant in the mustard family known by the common name Mount Hamilton jewelflower.[1] It is endemic to Santa Clara County, California, where it is known from only about five occurrences around Mount Hamilton.[2] It grows in chaparral and woodlands and on dry scree. It is an annual herb producing a small stem up to 8 or 9 centimeters tall with a bristly base. The toothed oval leaves are under 2 centimeters long. The inflorescence is a cluster-like raceme of flowers, the top ones sterile. The fertile flowers on the lower raceme have calyces of bristly purple-green sepals under a centimeter long with flaring purple petals at the tip. The sterile flowers at the top of the raceme have narrow, elongated, hairless purple sepals. The fruit is a cylindrical, bristle-studded silique measuring up to 2 or 2.5 centimeters long. References1. ^{{cite web|url=http://www.morgan-hill.ca.gov/DocumentCenter/Home/View/5105|title=Biological Evaluation_Monterey S. of Watsonville Biological Evaluation Santa Clara County, California_LiveOakAssociates,Inc.}} 2. ^The Nature Conservancy External links
4 : Streptanthus|Natural history of Santa Clara County, California|Endemic flora of California|Endemic flora of the San Francisco Bay Area |
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