Physaria ovalifolia |
Physaria prostrata |
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roundleaf bladderpod |
low bladderpod |
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Habit | 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). | Perennials; caudex branched; densely pubescent, trichomes (usually sessile, rarely short-stalked), several-rayed, rays furcate or bifurcate, (umbonate, tuberculate throughout). | ||||
Stems | few to several from base, erect or outer decumbent, 0.5–2.5 dm. |
several from base, usually prostrate, rarely decumbent, (unbranched, often purplish, sparsely pubescent), to 1.5 dm. |
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Basal leaves | blade suborbicular to elliptic or ovate or deltate, 0.5–2(–6.5) cm, margins entire or shallowly dentate. |
blade deltate, hastate, or, less often, rhombic to elliptic, 1–5 cm, margins entire (often partially involute). |
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Cauline leaves | (proximal shortly petiolate, distal usually sessile); blade narrowly elliptic or obovate, (0.5–)1–2.5(–4) cm, margins entire. |
(proximal shortly petiolate); blade linear to oblanceolate, 0.5–1.5 cm, margins entire. |
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Racemes | compact, (± subumbellate to densely corymbiform, elongated or not). |
loose, elongated. |
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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). |
sepals (often purplish), oblong, lanceolate, or ovate, 4–6 mm, (median pair thickened apically); petals spatulate or cuneate, 5–8(–9) mm, (margins undulate). |
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Fruiting pedicels | (usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout). |
(ascending, slightly sigmoid to straight), 5–10 mm. |
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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. |
ovoid or ellipsoid, slightly compressed, 3–5(–6) mm, (base often gibbous); valves pubescent, trichomes loose, furcate near their bases and spreading, sometimes sparsely pubescent inside; ovules 4(–8) per ovary; style 1.5–4 mm. |
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Seeds | flattened. |
flattened. |
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Physaria ovalifolia |
Physaria prostrata |
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Phenology | Flowering May–Jun. | |||||
Habitat | Whitish sand and small rocks on steep slopes, dry hillsides, windswept knolls, shaley slopes | |||||
Elevation | 1800-2500 m (5900-8200 ft) | |||||
Distribution |
CO; KS; NE; NM; OK; TX
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ID; UT; WY |
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Physaria prostrata is sometimes found on igneous substrates, which is unusual for the genus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 655. | FNA vol. 7, p. 658. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella ovalifolia, Lesquerella engelmannii subsp. ovalifolia | Lesquerella prostrata | ||||
Name authority | (Rydberg) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | (A. Nelson) O’Kane & Al-Shehbaz: Novon 12: 327. (2002) | ||||
Web links |