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manyhead bladderpod

St. Mary's Peak or bitterroot bladderpod

Habit Perennials; caudex (buried), branched, (not thickened); densely pubescent, trichomes (sessile or short-stalked), 5–8-rayed, rays furcate or bifurcate, (umbonate, rough to finely tuberculate throughout). Perennials; caudex simple, (thickened with persistent leaf bases); densely (silvery) pubescent, trichomes 5- or 6-rayed, rays furcate or 3-branched.
Stems

several from base, prostrate, (slender, sparsely pubescent), 0.5–2 dm.

simple or few to several from base, prostrate, (from below a terminal rosette of leaves, unbranched), 0.2–0.5 dm.

Basal leaves

blade obovate to narrowly elliptic, 1.5–6 cm, margins usually entire, rarely shallowly dentate, (surfaces densely pubescent, often silvery).

blade elliptic to broadly ovate or obovate, (1–)1.5–2.5(–3) cm, margins entire, (apex obtuse).

Cauline leaves

blade oblanceolate to spatulate, 0.5–1 cm, margins entire, (surfaces often sparsely pubescent).

blade spatulate, 3–7 mm, (base cuneate), margins entire.

Racemes

(narrow), loose, (elongated in fruit).

not loose, (scarcely elongated in fruit, 3–5-flowered).

Flowers

sepals (greenish brown, sometimes magenta), linear or elliptic, 4.3–6(–7.5) mm, (median pair thickened apically, cucullate);

petals (frequently pink or magenta in distal 1/3–1/2), spatulate to oblanceolate, 6–10(–12) mm, (claw undifferentiated from blade).

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 to somewhat spreading, straight to slightly curved), 4–8(–12) mm.

(straight or slightly curved).

Fruits

broadly ovoid to suborbicular, inflated, (terete or, often, slightly angustiseptate), 3–6mm;

valves sparsely pubescent;

ovules usually 4, rarely 6–8 per ovary;

style 3–6.5 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

plump.

plump, (slightly compressed).

Physaria multiceps

Physaria humilis

Phenology Flowering May–Jul. Flowering Jun-early Aug.
Habitat Douglas-fir or spruce woodlands, limestone ridges, damp open slopes, soil pockets among rocks, crevices of rocks, decomposed calcareous rocks Steep slopes, dry summits, rocky fellfields, dry ledges
Elevation 2400-2900 m (7900-9500 ft) 2700-2900 m (8900-9500 ft)
Distribution
from FNA
ID; UT; WY
[BONAP county map]
from FNA
MT
[BONAP county map]
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. 651. FNA vol. 7, p. 644.
Parent taxa Brassicaceae > tribe Physarieae > Physaria Brassicaceae > tribe Physarieae > Physaria
Sibling taxa
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. 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. 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
Synonyms Lesquerella multiceps Lesquerella humilis
Name authority (Maguire) O’Kane & Al-Shehbaz: Novon 12: 325. (2002) (Rollins) O’Kane & Al-Shehbaz: Novon 12: 324. (2002)
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