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Physaria alpestris

alpine twin-pod, Washington bladder-pod, Washington twin-pod

parasol 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, (usually covered with persistent leaf bases, cespitose); densely pubescent, trichomes (closely appressed), rays distinct, usually bifurcate.
Stems

several from base, decumbent to ascending, (unbranched), 0.5–1.5 dm.

several from base, erect, (unbranched, slender), 0.1–0.6 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 rhombic to obovate, 2–4 cm, margins entire.

Cauline leaves

blade oblanceolate, 0.5–1.5 cm (width 3–5 mm), margins entire.

blade linear-oblanceolate, similar to basal.

Racemes

subcorymbose.

dense (distally, subumbellate).

Flowers

sepals oblong, 8–10 mm;

petals spatulate, 12–14 mm.

sepals (yellowish), oblong to elliptic, 3.5–7 mm, (median pair usually thickened apically, cucullate);

petals lingulate to spatulate, 4–7 mm.

Fruiting pedicels

(divaricate, straight), 5–10 mm.

(divaricate-ascending), 3–5 mm, (densely pubescent).

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.

(erect), ovate to suborbicular, compressed apically (latiseptate), 3–4 mm;

valves pubescent;

replum ovate to obovate;

ovules 4–6 per ovary;

style 2–3 mm.

Seeds

flattened, (2–3 mm).

plump.

2n

= 48–52, 52, 64, 67–70.

= 10.

Physaria alpestris

Physaria subumbellata

Phenology Flowering May–Jun. Flowering Apr–Jun.
Habitat Alpine scree, rocky ridges, talus slopes, volcanic sands and gravel, serpentine gravel, granitic slopes, mountain shrub, subalpine fir, and whitebark pine communities Rocky high ridges, gravel and stony areas, juniper covered knolls, rock crevices, clay hillsides, pinyon-juniper areas, calcareous substrates
Elevation (700-)1300-2400 m ((2300-)4300-7900 ft) 1600-2700 m (5200-8900 ft)
Distribution
from FNA
WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; UT; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 7, p. 624. FNA vol. 7, p. 663.
Parent taxa Brassicaceae > tribe Physarieae > Physaria Brassicaceae > tribe Physarieae > Physaria
Sibling taxa
P. acutifolia, P. alpina, P. angustifolia, P. arctica, P. arenosa, P. argyraea, P. arizonica, P. aurea, P. bellii, P. brassicoides, P. calcicola, P. calderi, P. carinata, P. chambersii, P. cinerea, P. condensata, P. congesta, P. cordiformis, P. curvipes, P. densiflora, P. didymocarpa, P. dornii, P. douglasii, P. eburniflora, P. engelmannii, P. eriocarpa, P. fendleri, P. filiformis, P. floribunda, P. fremontii, P. garrettii, P. geyeri, P. globosa, P. gooddingii, P. gordonii, P. gracilis, P. grahamii, P. hemiphysaria, P. hitchcockii, P. humilis, P. integrifolia, P. intermedia, P. kingii, P. klausii, P. lata, P. lepidota, P. lesicii, P. lindheimeri, P. ludoviciana, P. macrocarpa, P. mcvaughiana, P. montana, P. multiceps, P. navajoensis, P. nelsonii, P. newberryi, P. obcordata, P. obdeltata, P. occidentalis, P. oregona, P. ovalifolia, P. pachyphylla, P. pallida, P. parviflora, P. parvula, P. pendula, P. pinetorum, P. prostrata, P. pruinosa, P. pulvinata, P. purpurea, P. pycnantha, P. rectipes, P. recurvata, P. reediana, P. rollinsii, P. saximontana, P. scrotiformis, P. sessilis, P. spatulata, P. subumbellata, P. tenella, P. thamnophila, P. tumulosa, P. valida, P. vicina, P. vitulifera
P. acutifolia, P. alpestris, P. alpina, P. angustifolia, P. arctica, P. arenosa, P. argyraea, P. arizonica, P. aurea, P. bellii, P. brassicoides, P. calcicola, P. calderi, P. carinata, P. chambersii, P. cinerea, P. condensata, P. congesta, P. cordiformis, P. curvipes, P. densiflora, P. didymocarpa, P. dornii, P. douglasii, P. eburniflora, P. engelmannii, P. eriocarpa, P. fendleri, P. filiformis, P. floribunda, P. fremontii, P. garrettii, P. geyeri, P. globosa, P. gooddingii, P. gordonii, P. gracilis, P. grahamii, P. hemiphysaria, P. hitchcockii, P. humilis, P. integrifolia, P. intermedia, P. kingii, P. klausii, P. lata, P. lepidota, P. lesicii, P. lindheimeri, P. ludoviciana, P. macrocarpa, P. mcvaughiana, P. montana, P. multiceps, P. navajoensis, P. nelsonii, P. newberryi, P. obcordata, P. obdeltata, P. occidentalis, P. oregona, P. ovalifolia, P. pachyphylla, P. pallida, P. parviflora, P. parvula, P. pendula, P. pinetorum, P. prostrata, P. pruinosa, P. pulvinata, P. purpurea, P. pycnantha, P. rectipes, P. recurvata, P. reediana, P. rollinsii, P. saximontana, P. scrotiformis, P. sessilis, P. spatulata, P. tenella, P. thamnophila, P. tumulosa, P. valida, P. vicina, P. vitulifera
Synonyms Lesquerella alpestris Lesquerella subumbellata
Name authority Suksdorf: W. Amer. Sci. 15: 58. (1906) (Rollins) O’Kane & Al-Shehbaz: Novon 12: 328. (2002)
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