Physaria bellii |
Physaria fremontii |
|
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Bell's or Front Range twinpod, Bell's twinpod, Front Range twinpod |
Fremont's bladderpod |
|
Habit | Perennials; caudex simple, (relatively large); densely (silvery) pubescent, trichomes (sessile, appressed), rays furcate, fused at base. | Perennials; caudex simple; densely pubescent, trichomes (subsessile), 5–7-rayed, rays distinct or slightly fused at base, usually furcate, (roughly tuberculate). |
Stems | simple from base, decumbent to nearly prostrate, 0.5–1.3 dm. |
few to several from base, prostrate, (arising proximal to a terminal cluster of erect leaves, usually unbranched, slender), 0.5–1(–1.5) dm. |
Basal leaves | (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). |
(petiole slender); blade elliptic to rhombic, 1.5–4(–5) cm, (base gradually tapering to petiole), margins usually entire, rarely dentate. |
Cauline leaves | blade oblanceolate to broadly obovate, 1–2.5 cm, margins entire. |
blade narrowly obovate to oblanceolate, 5–15 mm, margins entire. |
Racemes | dense. |
(relatively short), rather loose. |
Flowers | 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). |
sepals ± elliptic, 4–6 mm; petals ovate, 6–8 mm, (claw slightly expanded at base). |
Fruiting pedicels | (divaricate-ascending to widely spreading, slightly sigmoid to curved), 7–12 mm. |
(usually secund, recurved), 5–8 mm. |
Fruits | 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. |
(pendent), globose, subglobose, or slightly obcompressed, slightly or not inflated, 3–6 mm, (rigid, apex usually beaked); valves pubescent throughout; ovules 8–12 per ovary; style 1–2 mm, (pubescent). |
Seeds | compressed. |
slightly flattened, (suborbicular). |
2n | = 8. |
|
Physaria bellii |
Physaria fremontii |
|
Phenology | Flowering Mar–Jun(-Jul). | Flowering May–Jun. |
Habitat | Dark shale, road cuts, ridge crests, washes | Calcareous gravel, loose whitish rubble, limestone pavement, rocky calcareous ridges |
Elevation | 1500-1800 m (4900-5900 ft) | 2100-2800 m (6900-9200 ft) |
Distribution |
CO
|
WY |
Discussion | 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.) |
Of conservation concern. Physaria fremontii is known from the area of the Wind River Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 628. | FNA vol. 7, p. 638. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella fremontii | |
Name authority | G. A. Mulligan: Canad. J. Bot. 44: 1662, fig. 1, plate 1, fig. 3. (1966) | (Rollins & E. A. Shaw) O’Kane & Al-Shehbaz: Novon 12: 323. (2002) |
Web links |