Physaria congesta |
Physaria obcordata |
|
---|---|---|
Dudley bluffs bladderpod |
Dudley bluffs twinpod, Piceance twinpod |
|
Habit | Perennials; (relatively diminutive, strongly condensed); caudex (buried), simple or branched, (stout, thatched, thickened with persistent leaf bases); densely pubescent, trichomes (appressed, stiff), 4- or 5-rayed, rays fused at center, (mostly bifurcate). | Perennials; caudex branched, (thick, covered with persistent, overlapping leaf bases); densely (silvery) pubescent, trichomes (stellate-scalelike), several-rayed, rays fused (webbed) to tips. |
Stems | simple or few from base, decumbent to ascending, (arising laterally from a tight hemispherical tuft of leaves), to 0.15 dm. |
several from base, erect to decumbent, (unbranched, fertile stems from among basal leaves), 1.2–1.8 dm. |
Basal leaves | similar to cauline, (erect, surfaces silvery). |
(erect, not rosulate); blade broadly oblanceolate, 4–8 cm, margins entire or shallowly sinuate-dentate, (apex acute). |
Cauline leaves | (ascending, subsessile); blade linear-oblanceolate, (0.6–)0.8–1.3(–1.5) cm, margins entire, (apex acute to narrowly obtuse). |
(proximal petiolate); blade narrowly lanceolate, similar to basal in size, (distal with cuneate base), margins entire. |
Racemes | strongly congested, (often sessile or nearly so, lateral to leaves). |
loose, (elongated in fruit). |
Flowers | sepals (loosely erect), narrowly oblong, 3–4 mm; petals spatulate, 5–6 mm. |
sepals (greenish yellow), elliptic, often broadly so, 4.8–7.1 mm; petals oblanceolate, 6.8–9.8 mm. |
Fruiting pedicels | (erect or ascending, straight to slightly curved), 3–6 mm. |
(widely spreading to recurved), 1–1.5 cm. |
Fruits | ovate, compressed (latiseptate) on margins and apically, 4–5 mm; valves pubescent, trichomes densely appressed; ovules 4 per ovary; style 1–1.5 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. |
Seeds | plump. |
plump. |
Physaria congesta |
Physaria obcordata |
|
Phenology | Flowering Apr–May. | Flowering May–Jun. |
Habitat | Barren knolls with pinyon-juniper | Steep slopes, fine chiprock, shaley hillsides |
Elevation | 1800-2100 m (5900-6900 ft) | 1800-2300 m (5900-7500 ft) |
Distribution |
CO |
CO
|
Discussion | Of conservation concern. Physaria congesta is found on white, decomposed shale of the Thirteenmile Creek Tongue of the Green River Formation. (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.) |
Source | FNA vol. 7, p. 632. | FNA vol. 7, p. 653. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Lesquerella congesta | |
Name authority | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 322. (2002) | Rollins: J. Arnold Arbor. 64: 495, fig. 1. (1983) |
Web links |