Physaria ovalifolia |
Physaria obcordata |
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roundleaf bladderpod |
Dudley bluffs twinpod, Piceance twinpod |
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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, (thick, covered with persistent, overlapping leaf bases); densely (silvery) pubescent, trichomes (stellate-scalelike), several-rayed, rays fused (webbed) to tips. | ||||
Stems | few to several from base, erect or outer decumbent, 0.5–2.5 dm. |
several from base, erect to decumbent, (unbranched, fertile stems from among basal leaves), 1.2–1.8 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. |
(erect, not rosulate); blade broadly oblanceolate, 4–8 cm, margins entire or shallowly sinuate-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. |
(proximal petiolate); blade narrowly lanceolate, similar to basal in size, (distal with cuneate base), margins entire. |
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Racemes | compact, (± subumbellate to densely corymbiform, elongated or not). |
loose, (elongated in fruit). |
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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 (greenish yellow), elliptic, often broadly so, 4.8–7.1 mm; petals oblanceolate, 6.8–9.8 mm. |
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Fruiting pedicels | (usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout). |
(widely spreading to recurved), 1–1.5 cm. |
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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. |
(usually pendent), slightly didymous apically, obcordate, slightly inflated, 4–7 × 3–6 mm, (papery, basal sinus absent, apical sinus evident to nearly absent); valves (retaining seeds after dehiscence), pubescent; replum broadly obovate to suborbicular, 4–5 mm, as wide as or wider than fruit, margins entire; ovules usually 4 (rarely 6–8) per ovary; style (2.5–)3–4(–5) mm. |
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Seeds | flattened. |
plump. |
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Physaria ovalifolia |
Physaria obcordata |
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Phenology | Flowering May–Jun. | |||||
Habitat | Steep slopes, fine chiprock, shaley hillsides | |||||
Elevation | 1800-2300 m (5900-7500 ft) | |||||
Distribution |
CO; KS; NE; NM; OK; TX
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CO
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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 obcordata is known from the Thirteenmile Creek Tongue and the Parachute Creek Member of the Green River Formation. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (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. 653. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella ovalifolia, Lesquerella engelmannii subsp. ovalifolia | |||||
Name authority | (Rydberg) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | Rollins: J. Arnold Arbor. 64: 495, fig. 1. (1983) | ||||
Web links |