Physaria congesta |
Physaria scrotiformis |
|
---|---|---|
Dudley bluffs bladderpod |
silver twinpod, west silver bladderpod |
|
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; (diminutive); caudex simple or branched, (buried, with thatch of persistent leaf bases distally); (appearing silvery gray-green to silvery purple), densely pubescent, trichomes usually 5 or 6 (rarely 7)-rayed, rays bifurcate or incompletely so, (relatively short, stout, umbonate, moderately tuberculate to nearly smooth, lower layer smoother). |
Stems | simple or few from base, decumbent to ascending, (arising laterally from a tight hemispherical tuft of leaves), to 0.15 dm. |
1–5 from base, prostrate to slightly decumbent, (arising laterally, also erect or ascending from tuft of basal leaves, unbranched, purple-green), 0.08–0.3 dm. |
Basal leaves | similar to cauline, (erect, surfaces silvery). |
(petiole slightly winged); blade oblanceolate, elliptic, or rhombic, (mostly flat, sometimes somewhat folded), 0.6–2.7 cm, (base tapering to petiole), margins entire, (apex rounded to rounded-acute). |
Cauline leaves | (ascending, subsessile); blade linear-oblanceolate, (0.6–)0.8–1.3(–1.5) cm, margins entire, (apex acute to narrowly obtuse). |
(3–7, shortly petiolate or sessile); blade elliptic to oblanceolate, 0.3–0.5 cm, margins entire. |
Racemes | strongly congested, (often sessile or nearly so, lateral to leaves). |
crowded, (ca. 3–7 fruits). |
Flowers | sepals (loosely erect), narrowly oblong, 3–4 mm; petals spatulate, 5–6 mm. |
sepals (greenish yellow), linear-triangular, 3.7–5 mm, (lateral pair subsaccate); petals oblanceolate to narrowly obovate, 4.5–9 mm. |
Fruiting pedicels | (erect or ascending, straight to slightly curved), 3–6 mm. |
(ascending, straight), 1.8–3.4 mm. |
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. |
(shortly stipitate, purple or greenish purple in age), slightly didymous, ovoid to obpyriform, 3–5 mm (wider than long, base rounded-obtuse, apex rounded, flattened, or slightly emarginate); valves (inflated, slightly wider than replum), pubescent, trichomes scattered; replum obovate to orbicular-obdeltate, apex rounded, obtuse, or truncate; septum complete or medially small-perforate; ovules 4–6(–8) per ovary; style 2–3.6 mm. |
Seeds | plump. |
relatively plump, (ovate to suborbicular, usually rounded on one side, ± flat or concave on the other, not mucilaginous when wetted). |
Physaria congesta |
Physaria scrotiformis |
|
Phenology | Flowering Apr–May. | Flowering Jun-early Jul. |
Habitat | Barren knolls with pinyon-juniper | Tundra areas with islands of Engelmann spruce on Leadville limestone, amidst limestone cobbles and gravel |
Elevation | 1800-2100 m (5900-6900 ft) | 3500-3700 m (11500-12100 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.) |
Physaria scrotiformis is known only from La Plata County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 632. | FNA vol. 7, p. 662. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Lesquerella congesta | |
Name authority | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 322. (2002) | O’Kane: Novon 17: 376, fig. 1. (2007) |
Web links |