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FNA | Family List | FNA Vol. 7 | Brassicaceae | Physaria

62. Physaria ovalifolia (Rydberg) O’Kane & Al-Shehbaz, Novon. 12: 326. 2002.

Roundleaf bladderpod

Lesquerella ovalifolia Rydberg in N. L. Britton and A. Brown, Ill. Fl. N. U.S. 2: 137, fig. 1749. 1897; L. engelmannii (A. Gray) S. Watson subsp. ovalifolia (Rydberg ex Britton) C. Clark

Perennials; caudex simple or branched, (thickened by persistent leaf bases); densely pubescent (foliage usually scabrous), trichomes (sessile or short-stalked), several-rayed, rays furcate near base, (usually strongly umbonate, roughly tuberculate, less so over umbo). Stems few to several from base, erect or outer decumbent, 0.5-2.5 dm. Basal leaves: blade suborbicular to elliptic or ovate or deltate, 0.5-2(-6.5) cm, margins entire or shallowly dentate. Cauline leaves: (proximal shortly petiolate, distal usually sessile); blade narrowly elliptic or obovate, (0.5-)1-2.5(-4) cm, margins entire. Racemes compact, (± subumbellate to densely corymbiform, elongated or not). Fruiting pedicels (usually spreading at right angles, sometimes nearly erect, ± straight), 5-15(-20) mm, (stout). Flowers: sepals ± elliptic, 4.5-7(-8.5) mm, (median pair thickened apically); petals (sometimes white), suborbicular to obovate or obdeltate, 6.5-15 mm, (base narrowing to broad claw, apex sometimes emarginated). Fruits (sessile or shortly stipitate, less than 1 mm), subglobose to broadly ellipsoid, inflated or slightly compressed (terete or subterete), (4-)5-8(-9) mm; valves (not retaining seeds after dehiscence), glabrous; replum as wide as or wider than fruit; ovules 8-16 per ovary; style 4-8(-9) mm. Seeds flattened.

Subspecies 2 (2 in the flora): wc United States.

1 Caudices branched (well-developed); petals usually yellow, rarely white, 6.5-12(-14) mm, usually 1.5 times or less as long as sepals; racemes usually not elongated (subumbellate).   62a Physaria ovalifolia subsp. ovalifolia
+ Caudices usually simple; petals white, (9-)11-15 mm, often 2 times as long as sepals; racemes usually elongated.   62b Physaria ovalifolia subsp. alba

Lower Taxa


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