Physaria parviflora |
Physaria bellii |
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frosty bladderpod, Piceance bladderpod, Picenace bladderpod |
Bell's or Front Range twinpod, Bell's twinpod, Front Range twinpod |
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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; caudex simple, (relatively large); densely (silvery) pubescent, trichomes (sessile, appressed), rays furcate, fused at base. |
Stems | several from base, prostrate to decumbent, (usually unbranched, rarely branched distally), 1–3 dm. |
simple from base, decumbent to nearly prostrate, 0.5–1.3 dm. |
Basal leaves | (tufted); blade broadly obovate, 1–2 cm, margins entire or with 1 or 2 broad teeth, (apex rounded to obtuse). |
(strongly rosulate; shortly petiolate); blade broadly obovate, 1.5–7.5 (width 7.5–26 mm, base gradually tapering to petiole), margins shallowly dentate, (apex obtuse). |
Cauline leaves | blade oblanceolate to nearly oblong, similar to basal, (base cuneate), margins entire. |
blade oblanceolate to broadly obovate, 1–2.5 cm, margins entire. |
Racemes | (secund), loose, (elongated in fruit). |
dense. |
Flowers | sepals (yellowish), elliptic to lanceolate, (2–)3–4 mm; petals spatulate, (3.9–)5–7 mm. |
sepals (pale yellow or yellow-green), narrowly lanceolate to narrowly deltate, 4–8 mm; petals yellow, broadly spatulate to obovate, 9–13 mm, (not clawed). |
Fruiting pedicels | (recurved), 6–8(–12) mm. |
(divaricate-ascending to widely spreading, slightly sigmoid to curved), 7–12 mm. |
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. |
didymous, slightly flattened (contrary to replum) to uncompressed, 4–9 × 2–8 mm, (strongly coriaceous, apical and basal sinuses narrow, deep); valves (retaining seeds after dehiscence), pubescent, trichomes appressed; replum narrowly oblanceolate to narrowly linear-oblong, as wide as or wider than fruit, apex obtuse; ovules 4 per ovary; style more than 3 mm. |
Seeds | somewhat flattened. |
compressed. |
2n | = 8. |
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Physaria parviflora |
Physaria bellii |
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Phenology | Flowering Jun–Jul. | Flowering Mar–Jun(-Jul). |
Habitat | Shale of steep slopes, rock crevices, ledges, canyon sides, shale-marlstone | Dark shale, road cuts, ridge crests, washes |
Elevation | 2100-2700 m (6900-8900 ft) | 1500-1800 m (4900-5900 ft) |
Distribution |
CO
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CO
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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.) |
Of conservation concern. Physaria bellii is often found in shale and limestone soils of the Fountain/Ingleside, Lykins, Niobrara, and Pierre formations. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 657. | FNA vol. 7, p. 628. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella parviflora | |
Name authority | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | G. A. Mulligan: Canad. J. Bot. 44: 1662, fig. 1, plate 1, fig. 3. (1966) |
Web links |