Physaria parvula |
Physaria humilis |
|
---|---|---|
pygmy bladderpod |
St. Mary's Peak or bitterroot bladderpod |
|
Habit | Perennials; caudex (buried), usually branched, sometimes simple, (cespitose); densely pubescent, trichomes (appressed), 4–7-rayed, rays distinct, furcate or bifurcate near base. | Perennials; caudex simple, (thickened with persistent leaf bases); densely (silvery) pubescent, trichomes 5- or 6-rayed, rays furcate or 3-branched. |
Stems | few to several from base, erect, (unbranched, slender), 0.3–1.5(–3) dm. |
simple or few to several from base, prostrate, (from below a terminal rosette of leaves, unbranched), 0.2–0.5 dm. |
Basal leaves | (tufted, erect); blade linear to very narrowly spatulate, 1–3(–4) cm, margins entire (involute). |
blade elliptic to broadly ovate or obovate, (1–)1.5–2.5(–3) cm, margins entire, (apex obtuse). |
Cauline leaves | similar to basal. |
blade spatulate, 3–7 mm, (base cuneate), margins entire. |
Racemes | relatively dense. |
not loose, (scarcely elongated in fruit, 3–5-flowered). |
Flowers | sepals (greenish yellow), elliptic, 3.5–7 mm; petals spatulate, 5–6 mm, (not clawed). |
sepals (yellow-green), narrowly elliptic to narrowly long-triangular, 3.7–5 mm; petals oblanceolate to nearly obovate, 7–8.5 mm, (abruptly tapering to narrow claw). |
Fruiting pedicels | (ascending, curved or sigmoid), 2–10 mm. |
(straight or slightly curved). |
Fruits | (erect), ovoid (or longer than broad), usually inflated, 4–5 mm, (apex acute, slightly flattened); valves pubescent, trichomes appressed; ovules 4–8 per ovary; style 2–4 mm. |
wider than long, apex truncate to shallowly notched, compressed (angustiseptate), 3–4 mm; valves densely pubescent, trichomes ascending to erect, sparsely pubescent inside; ovules 4 per ovary; style 2–3 mm. |
Seeds | flattened, (mucilaginous). |
plump, (slightly compressed). |
2n | = 10, 20. |
|
Physaria parvula |
Physaria humilis |
|
Phenology | Flowering May–Jul. | Flowering Jun-early Aug. |
Habitat | Exposed windblown ridges, gravelly hills, open rocky knolls, gravelly hilltops, clay hillsides, granitic sand, reddish soil, sagebrush, mountain scrub, and pinyon-juniper areas | Steep slopes, dry summits, rocky fellfields, dry ledges |
Elevation | 1800-2800 m (5900-9200 ft) | 2700-2900 m (8900-9500 ft) |
Distribution |
CO; UT; WY
|
MT |
Discussion | Of conservation concern. Physaria humilis is found in metamorphosed rock and detritus on the peaks of the Bitterroot Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 657. | FNA vol. 7, p. 644. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella parvula, Lesquerella alpina subsp. parvula, Lesquerella alpina var. parvula | Lesquerella humilis |
Name authority | (Greene) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 324. (2002) |
Web links |