Physaria alpestris |
Physaria calderi |
|
---|---|---|
alpine twin-pod, Washington bladder-pod, Washington twin-pod |
Calder's 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 simple or branched; densely pubescent throughout, trichomes (sessile or subsessile), rays distinct or slightly fused at base, furcate or bifurcate, (strongly umbonate, tuberculate, tubercles often relatively larger, fewer over center). |
Stems | several from base, decumbent to ascending, (unbranched), 0.5–1.5 dm. |
simple or few to several from base, usually erect to spreading, sometimes prostrate, 0.5–2 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 oblanceolate, 2–3 cm, margins entire. |
Cauline leaves | blade oblanceolate, 0.5–1.5 cm (width 3–5 mm), margins entire. |
(sessile or proximal shortly petiolate); blade narrowly oblanceolate, 0.5–1.5 cm, margins entire. |
Racemes | subcorymbose. |
loose. |
Flowers | sepals oblong, 8–10 mm; petals spatulate, 12–14 mm. |
sepals ovate to elliptic, (3–)4–5(–6) mm, (median pair often thickened apically, cucullate); petals obovate, (6–)7–10 mm (nearly as wide, abruptly narrowed to claw, ca. 1 mm wide). |
Fruiting pedicels | (divaricate, straight), 5–10 mm. |
(erect to divaricate or ascending, sometimes curved), (5–)10–20(–40) mm, (stout). |
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. |
subglobose to ellipsoid, compressed (usually angustiseptate), to 8 mm; (valves not retaining seeds after dehiscence); replum as wide as or wider than fruit; ovules 10–14 per ovary; style 1–2 mm. |
Seeds | flattened, (2–3 mm). |
plump. |
2n | = 48–52, 52, 64, 67–70. |
= 20. |
Physaria alpestris |
Physaria calderi |
|
Phenology | Flowering May–Jun. | Flowering Jun–Aug. |
Habitat | Alpine scree, rocky ridges, talus slopes, volcanic sands and gravel, serpentine gravel, granitic slopes, mountain shrub, subalpine fir, and whitebark pine communities | Dry rocky summits, limestone flats and slopes, alpine knolls |
Elevation | (700-)1300-2400 m ((2300-)4300-7900 ft) | 600-1500 m (2000-4900 ft) |
Distribution |
WA
|
AK; NT; YT |
Discussion | Physaria calderi is known from the Ogilvie and Richardson mountains. (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 calderi, Lesquerella arctica subsp. calderi |
Name authority | Suksdorf: W. Amer. Sci. 15: 58. (1906) | (G. A. Mulligan & A. E. Porsild) O’Kane & Al-Shehbaz: Novon 12: 322. (2002) |
Web links |