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Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Fabaceae (Leguminosae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual, perennial herb from crown, generally unarmed; hairs generally present, simple or branches 2, from base, parallel to leaf surface, unequal or not. Stem: 0 or prostrate to erect. Leaf: odd-1-pinnate (or palmately compound); leaflets generally jointed to midrib, entire; stipules membranous, lower fused around stem into sheaths (stipule sheaths) or not. Inflorescence: raceme, head- or umbel-like or not, axillary; flowers 2--many. Flower: bilateral; keel petals with small protrusion at base locking into pit on adjacent wing; 9 filaments fused, 1 free; ovary (and fruit) generally sessile, style slender, stigma minute. Fruit: generally 1- or +- 2-chambered, often mottled, generally +- dry in age, sometimes deciduous (falling from plant with or without pedicel, calyx, receptacle) before dehiscence. Seed: 2--many, smooth, compressed, +- notched at attachment scar.
Species In Genus: > 2500 species: +- worldwide (380 in North America, 97 in California, including many rare taxa). Etymology: (Greek: ankle-bone or dice, perhaps from rattling of seeds within fruit) Note: Difficult; flower and fruit needed for identification; fruit said to be "deciduous" dehisce only after fruit has separated from pl; many good species appear similar; some species complexes need study. Taxa near province boundaries may appear in > 1 key. Varieties keyed under species for simplicity; species with varieties so identified in key. Fruit length including beak and any stalk-like base unless fruit body specified; fruit depth is suture-to-suture axis. Astragalus tephrodes A. Gray var. brachylobus (A. Gray) Barneby in southwestern Utah, Arizona, near California.
eFlora Treatment Author: Martin F. Wojciechowski & Richard Spellenberg
Jepson Online Interchange
Key to AstragalusPrevious taxon: Amorpha fruticosa
Next taxon: Astragalus accidens var. hendersonii
Citation for this treatment: Martin F. Wojciechowski & Richard Spellenberg 2016. Astragalus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=9291, accessed on May 29, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 29, 2016.