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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Perennial herb, unarmed, hairy. Leaf: odd-1-pinnate, generally basal; stipules generally partly fused to petiole, initially forming a sheath, or free. Inflorescence: raceme, generally scapose, spike- or head-like or not, or 1–2-flowered; bracts generally persistent. Flower: calyx lobes < tube; corolla pink-purple, white, or ± yellow, keel tip beaked; 9 filaments fused, 1 free; style, stigma glabrous. Fruit: erect to reflexed, generally persistent, oblong to lanceolate, ± inflated, ± 2-chambered, septum from upper suture, partial to complete.
± 350 species: Eurasia, North America. (Greek: sharp keel) Seriously TOXIC: causes "staggers" in livestock, mostly outside California. [Welsh 2001 Revision N Amer Oxytropis. E.P.S.]
Unabridged references: [Barneby 1952 Proc Calif Acad Sci Series IV 27:177–309; Welsh 2001 Revision of North American species of Oxytropis de Candolle (Leguminosae), E.P.S., Orem, UT]

Key to Oxytropis

1. Flower quickly reflexed, fruit reflexed; leaves basal and generally 1–3 cauline; inflorescence open, spike-like ..... O. deflexa var. sericea

1' Flower and fruit ascending to erect; leaves basal; inflorescence dense, spike- or head-like

2. Leaflets 7–17; plant silvery or gray, silky or tomentose, not glandular; corolla 7–12 mm

3. Flowers 2–12 per inflorescence; fruit ovate-inflated, 7–9 mm wide, thinly papery ..... O. oreophila var. oreophila

3' Flowers 1–3 per inflorescence; fruit lanceolate to narrowly ovate, 5–6 mm wide, leathery ..... O. parryi

2' Leaflets 21–39; plant green, puberulent, generally ± sticky-glandular; corolla 10–20 mm ..... O. borealis

4. Corolla white to cream; inflorescence generally head-like, included to ± exserted; plant sticky-glandular ..... var. australis

4' Corolla ± white with purple keel-tip, lilac, or red-purple, drying blue; inflorescence spike-like, exserted; plant ± sticky-glandular ..... var. viscida


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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