Physaria ovalifolia |
Physaria thamnophila |
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roundleaf bladderpod |
Zapata 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 simple or branched, (woody); densely (silvery) pubescent, trichomes (short-stalked), 4–8-rayed, rays furcate or bifurcate, (finely tuberculate throughout). | ||||
Stems | few to several from base, erect or outer decumbent, 0.5–2.5 dm. |
simple or few from base, decumbent, (straggling and flexuous, usually branched distally), 4–8 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 narrowly elliptic to oblanceolate, 4–12 cm, margins entire, sinuate, or shallowly dentate, (apex acute). |
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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. |
(sessile or proximal shortly petiolate); blade linear to narrowly elliptic, 3–4 cm, margins entire, sinuate, or remotely dentate, (apex acute). |
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Racemes | compact, (± subumbellate to densely corymbiform, elongated or not). |
loose, (sometimes greatly 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 elliptic, 3.5–4 mm, (lateral pair subsaccate, median pair thickened apically, cucullate); petals broadly obovate, 4–5 mm, (sometimes with short, broad claw). |
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Fruiting pedicels | (usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout). |
(recurved), 15–20(–25) 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. |
(pendent), subglobose or broadly ovoid, slightly compressed, 5–7 mm; valves (not retaining seeds after dehiscence), glabrous throughout; ovules per ovary unknown; style 1.5–2 mm. |
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Seeds | flattened. |
flattened. |
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2n | = 16. |
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Physaria ovalifolia |
Physaria thamnophila |
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Phenology | Flowering Apr. | |||||
Habitat | Sandy soils, entangled in shrubs, cactus clumps | |||||
Elevation | 1700-1800 m (5600-5900 ft) | |||||
Distribution |
CO; KS; NE; NM; OK; TX
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TX |
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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 thamnophila is found in sandy areas with shrubs and cactus in sparse shrubland communities of Starr and Zapata counties. It sometimes flowers through September with sufficient moisture. (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. 664. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella ovalifolia, Lesquerella engelmannii subsp. ovalifolia | Lesquerella thamnophila | ||||
Name authority | (Rydberg) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | (Rollins & E. A. Shaw) O’Kane & Al-Shehbaz: Novon 12: 328. (2002) | ||||
Web links |