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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.
Annual, fleshy. Stem: prostrate or reclined, many-branched, brittle; angles ± glabrous, bristly, or generally with hooked prickles. Leaf: simple, cauline, lower opposite, upper alternate; petioles generally winged, clasping; blade pinnate-lobed, uppermost reduced, short-petioled, generally deltate, 3-lobed, with small, sharp bristles both surfaces. Inflorescence: terminal, axillary, opposite leaves, or flowers 1; pedicels present. Flower: calyx lobes hairy, bristly-ciliate; corolla rotate, lobes ± = tube, generally hairy; stamens included, equal, equally attached; ovary bristly-hairy, chamber appearing 1, style 1, 2-lobed in distal 1/2. Fruit: capsule, spheric, stout-bristly-hairy. Seed: 1–8, spheric, brown, pitted or honeycombed.
3 species: California, Arizona, Baja California. (Greek: scale mouth)
Unabridged references: [Constance 1939 Bull Torrey Bot Club 66:341–352]
1. Calyx sinus appendages 0; calyx not enclosing mature fruit ..... P. membranaceum
1' Calyx sinus appendages present; calyx enclosing mature fruit
2. Petiole narrow-winged; style 1–3 mm; seeds 1–2 mm ..... P. racemosum
2' Petiole wide-winged; style 4–8 mm; seeds 2–3 mm ..... P. auritum
3. Corolla < 10 mm wide ..... var. arizonicum
3' Corolla 10–30 mm wide ..... var. auritum
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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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