Physaria parviflora |
Physaria arenosa |
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frosty bladderpod, Piceance bladderpod, Picenace bladderpod |
Great Plains bladderpod |
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Habit | Perennials; caudex simple or branched; densely (silvery) pubescent, trichomes (irregularly radiate), 6–8-rayed, rays furcate or bifurcate, fused at base. | Perennials or, rarely, annuals; caudex simple or branched; ± densely pubescent, trichomes (sessile or short-stalked), few-rayed, rays (usually spreading), distinct or slightly fused at base, furcate or bifurcate, (tuberculate). | ||||
Stems | several from base, prostrate to decumbent, (usually unbranched, rarely branched distally), 1–3 dm. |
simple or few from base, prostrate or straggling to erect, (sometimes purplish, usually unbranched), (0.5–)1–2(–3) dm. |
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Basal leaves | (tufted); blade broadly obovate, 1–2 cm, margins entire or with 1 or 2 broad teeth, (apex rounded to obtuse). |
blade oblanceolate, 1.5–5(–7) cm, margins entire or shallowly dentate, (flat). |
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Cauline leaves | blade oblanceolate to nearly oblong, similar to basal, (base cuneate), margins entire. |
blade elliptic to linear, (0.5–)1–2.5(–3) cm, margins usually entire. |
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Racemes | (secund), loose, (elongated in fruit). |
(secund), dense, (elongated in fruit). |
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Flowers | sepals (yellowish), elliptic to lanceolate, (2–)3–4 mm; petals spatulate, (3.9–)5–7 mm. |
sepals elliptic or oblong, 4–6(–7) mm, (lateral pair subsaccate, median pair thickened apically, cucullate); petals (often red or lavender when dried), obovate, 6–8.5(–9.5) mm, (narrowing to broad claw). |
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Fruiting pedicels | (recurved), 6–8(–12) mm. |
(usually sharply recurved, sometimes divaricate-spreading or nearly horizontal), 5–15(–20) mm, (stout). |
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Fruits | (usually pendent), elliptic to subglobose, usually slightly compressed (latiseptate), 3–4 mm; valves densely pubescent, sometimes with scattered trichomes inside; ovules 4 per ovary; style ca. 3 mm. |
subglobose, obovoid, or broadly ellipsoid, slightly inflated, (3.5–)4–5.5(–6.5) mm; valves densely pubescent outside, trichomes spreading or closely appressed, rarely sparsely pubescent inside; ovules (4–)8(–10) per ovary; style (slender), 3–5.5(–6.5) mm. |
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Seeds | somewhat flattened. |
slightly flattened. |
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Physaria parviflora |
Physaria arenosa |
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Phenology | Flowering Jun–Jul. | |||||
Habitat | Shale of steep slopes, rock crevices, ledges, canyon sides, shale-marlstone | |||||
Elevation | 2100-2700 m (6900-8900 ft) | |||||
Distribution |
CO
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CO; MT; ND; NE; SD; WY; AB; MB; SK
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Discussion | Of conservation concern. Physaria parviflora is known from the Parachute Creek Member of the Green River Formation, Rio Blanco County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 657. | FNA vol. 7, p. 626. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella parviflora | Vesicaria arenosa, Lesquerella arenosa, Lesquerella argentea var. arenosa, Lesquerella ludoviciana var. arenosa | ||||
Name authority | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | (Richardson) O’Kane & Al-Shehbaz: Novon 12: 321. (2002) | ||||
Web links |