Physaria alpestris |
Physaria pycnantha |
|
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alpine twin-pod, Washington bladder-pod, Washington twin-pod |
mountain-view 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; caudex branched, (densely cespitose and forming hemispheric mounds); densely pubescent, trichomes 5-rayed, rays bifurcate near base, fused at base, (strongly tuberculate throughout). |
Stems | several from base, decumbent to ascending, (unbranched), 0.5–1.5 dm. |
few to several from base, erect, (usually exceeding basal leaves), 0.3–0.7 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-spatulate, 1.5–4 cm, (base narrowed gradually to petiole), margins entire. |
Cauline leaves | blade oblanceolate, 0.5–1.5 cm (width 3–5 mm), margins entire. |
blade spatulate, similar to basal. |
Racemes | subcorymbose. |
crowded in distal 1/3, (4–10-flowered). |
Flowers | sepals oblong, 8–10 mm; petals spatulate, 12–14 mm. |
sepals (pale yellow), oblong to elliptic, 3–4 mm, (median pair usually thickened apically, cucullate); petals (sometimes with slight tinge of orange basally), lingulate, 4–6 mm. |
Fruiting pedicels | (divaricate, straight), 5–10 mm. |
(loosely to strongly sigmoid), 6–10 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. |
ellipsoid, slightly inflated (somewhat latiseptate), 4–5 mm, (apex acute); valves pubescent, trichomes erect, appearing slightly shaggy; ovules 4–8 per ovary; styles 2.5–3 mm, (shorter than mature fruits). |
Seeds | flattened, (2–3 mm). |
± flattened, convex on outer side. |
2n | = 48–52, 52, 64, 67–70. |
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Physaria alpestris |
Physaria pycnantha |
|
Phenology | Flowering May–Jun. | Flowering late May–Jun(-Jul). |
Habitat | Alpine scree, rocky ridges, talus slopes, volcanic sands and gravel, serpentine gravel, granitic slopes, mountain shrub, subalpine fir, and whitebark pine communities | Dry, windswept knolls of limestone gravel, with other cushion-forming plants |
Elevation | (700-)1300-2400 m ((2300-)4300-7900 ft) | 1600-2300 m (5200-7500 ft) |
Distribution |
WA
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ID; MT
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Discussion | Physaria pycnantha is morphologically similar to 56. P. nelsonii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 7, p. 624. | FNA vol. 7, p. 659. |
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria |
Sibling taxa | ||
Synonyms | Lesquerella alpestris | |
Name authority | Suksdorf: W. Amer. Sci. 15: 58. (1906) | Grady & O’Kane: Novon 17: 188, fig. 5. (2007) |
Web links |