Physaria alpestris |
Physaria calcicola |
|
---|---|---|
alpine twin-pod, Washington bladder-pod, Washington twin-pod |
Rocky Mountain bladderpod |
|
Habit | Perennials; caudex usually simple, rarely branched, (cespitose); (silvery) pubescent throughout, trichomes several-rayed, rays (1- or) 2-bifurcate, (low-umbonate, tubercles relatively few, small). | Perennials; (compact); caudex branched; densely (silvery) pubescent, trichomes (sessile or short-stalked), 5–8-rayed, rays distinct, furcate or bifurcate, (umbonate, tuberculate and the center less so). |
Stems | several from base, decumbent to ascending, (unbranched), 0.5–1.5 dm. |
several from base, erect or outer ones decumbent, (unbranched, stout, usually sparsely leaved), 1–3 dm. |
Basal leaves | (petiole slender); blade obovate, 3–5 cm (width 10–20 mm, base tapering abruptly to petiole), margins entire, (apex rarely slightly acute). |
blade linear, 2–7(–10) cm, margins entire, repand, or shallowly dentate. |
Cauline leaves | blade oblanceolate, 0.5–1.5 cm (width 3–5 mm), margins entire. |
(sessile); blade (erect), spatulate to linear, (1–)2–3(–4.5) cm, margins entire, sometimes involute, (apex acute or subacute). |
Racemes | subcorymbose. |
dense, (exceeding basal leaves). |
Flowers | sepals oblong, 8–10 mm; petals spatulate, 12–14 mm. |
sepals ovate or oblong, (4.5–)5–6(–7) mm, (lateral pair subsaccate, cucullate, median pair thickened, cucullate apically); petals spatulate, 7–9(–11) mm (widened at base, slightly retuse). |
Fruiting pedicels | (divaricate, straight), 5–10 mm. |
(spreading, sharply sigmoid), 8–15 mm. |
Fruits | didymous, mostly highly inflated (strongly flattened at least in 1/2 toward replum), 14–18 × 14–18 mm, (papery, basal sinus slightly notched, apical open, shallow); valves (retaining seeds after dehiscence), evenly pubescent; replum lanceolate, 7–10 mm, width 1.5–2.5 mm, as wide as or wider than fruit, apex acute to acuminate; ovules 8–10 per ovary; style 5–7 mm. |
(sessile or substipitate), ovate to oblong, not compressed at distal margins or apex, 5–9 mm; valves sparsely pubescent, trichomes appressed; ovules 4–8 per ovary; style 3–5 mm. |
Seeds | flattened, (2–3 mm). |
flattened. |
2n | = 48–52, 52, 64, 67–70. |
= 16, ca. 20. |
Physaria alpestris |
Physaria calcicola |
|
Phenology | Flowering May–Jun. | Flowering May–Jun. |
Habitat | Alpine scree, rocky ridges, talus slopes, volcanic sands and gravel, serpentine gravel, granitic slopes, mountain shrub, subalpine fir, and whitebark pine communities | Shale bluffs, limestone hillsides, gypseous knolls and ravines, calcareous substrates, grasslands and pinyon-juniper communities |
Elevation | (700-)1300-2400 m ((2300-)4300-7900 ft) | 1400-2100 m (4600-6900 ft) |
Distribution |
WA
|
CO; NM
|
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 624. | FNA vol. 7, p. 629. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella alpestris | Lesquerella calcicola |
Name authority | Suksdorf: W. Amer. Sci. 15: 58. (1906) | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 322. (2002) |
Web links |