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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 from large taproot. Stem: much-branched. Leaf: petioled; blade < 8 cm, fleshy, margin often wavy. Inflorescence: head or umbel; bracts 5–10, green; flowers maturing 1 side of inflorescence before the other; receptacle flat or rounded, studded with peg-shaped pedicel-like projections 1–3 mm. Flower: nocturnal, perianth trumpet-shaped, lobes 4–5; stamens 3–5, included; stigma linear, included. Fruit: wings 2–4, wide, surrounding fruit body, translucent, conspicuously net-veined.
4 species: arid North America. (Greek, Latin: 3-winged cup, from fruit) [Galloway 2003 FNANM 4:70–71] Closely related to Abronia.

Key to Tripterocalyx

1. Perianth (8)18–25 mm, lobes obvious; fruit wings 2(3), hairy on margins and generally on veins near base; Modoc Plateau ..... T. crux-maltae

1' Perianth 6–18 mm, lobes inconspicuous; fruit wings (2)3(4), hairy only on margins; Mojave Desert ..... T. micranthus


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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