| 词条 | Astragalus douglasii |
| 释义 |
|name = Douglas's milkvetch |image = Astragalus_douglasii_8102.JPG |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Rosids |ordo = Fabales |familia = Fabaceae |genus = Astragalus |species = A. douglasii |binomial = Astragalus douglasii |binomial_authority = (Torr. & A. Gray) A. Gray |}} Astragalus douglasii is a species of milkvetch known by the common name Douglas's milkvetch. It is native to California and Baja California, where it can be found in many types of desert, valley, chaparral and woodlands, and montane habitats, usually below {{Convert|8000|feet|-2}} elevation. [1]DescriptionAstragalus douglasii is a bushy perennial herb producing a number of erect or prostrate stems up to a meter long. The abundant leaves are up to 18 centimeters long and are made up of oval-shaped leaflets. The open inflorescence holds up to 30 whitish to pale yellow flowers, each about a centimeter long. The calyx is green with {{Convert|0.7|-|2.6|mm|2|abbr=on}} lobes.[2]The fruit is an inflated legume pod up to 6 centimeters long and 3 wide which dries to a thin, papery texture.[2] VarietiesThere are three varieties of Astragalus douglasii:
References1. ^{{cite web | url= http://www.wildflowersearch.com/search?&PlantName=Astragalus+douglasii | last= Sullivan | first= Steven. K. | date= 2018 | title= Astragalus douglasii | website= Wildflower Search | accessdate= 2018-07-06 }} 2. ^1 {{cite web | url= http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=Astragalus%20douglasii | date= 2018 | title= Astragalus douglasii | website= in Jepson Flora Project (eds.) Jepson eFlora | publisher= Jepson Herbarium; University of California, Berkeley | accessdate= 2018-07-30}} External links
5 : Astragalus|Flora of Baja California|Flora of California|Flora of the Sierra Nevada (U.S.)|Flora of the California desert regions |
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