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Avery Peak or alpine twinpod, Avery Peak twinpod

arctic bladderpod

Habit Perennials; (with a long taproot), caudex usually buried, simple, (enlarged, covered with marcescent leaf bases, crown rosulate and horizontal to somewhat ascending, forming a dense crown at apex of caudex); (silvery) pubescent throughout, trichomes (sessile or stipitate), 5–8-rayed, rays furcate or bifurcate, (rounded to umbonate, strongly tuberculate, less so or smooth over center). Perennials; caudex simple or branched, (woody, cespitose); ± densely pubescent, trichomes (sessile or short-stalked), several-rayed, rays distinct, furcate or bifurcate, (somewhat umbonate, finely tuberculate to ± smooth).
Stems

few from base, decumbent, (arising laterally proximal to current season’s leaves), 0.3–0.8 dm.

simple or few to several from base, erect to spreading or prostrate, 0.5–2(–3) dm.

Basal leaves

(petiole slender);

blade broadly obovate, or deltate to ovate or narrower, 1.5–3.5 cm, (base abruptly to gradually narrowed to petiole), margins entire or obscurely few-toothed, (apex usually obtuse, nearly acute in narrower leaves).

(usually ± rosulate);

blade obovate to oblanceolate, (1–)2–6(–15) cm, margins entire.

Cauline leaves

(2–5 per stem);

blade oblanceolate to spatulate, similar to basal, margins entire, (apex acute).

(sessile or shortly petiolate);

blade oblanceolate or lingulate, 0.5–1.5(–3) cm, margins entire.

Racemes

loose, (3–6-flowered).

loose.

Flowers

sepals narrowly oblong to linear, 7–9 mm;

petals (erect), spatulate, 10–12(–15) mm.

sepals ovate to elliptic, (3–)4–5(–6) mm, (median pair often thickened apically, cucullate);

petals spatulate, 5–6(–7) mm, (blade gradually narrowed to claw).

Fruiting pedicels

(widely spreading to ascending, slightly curved or straight), 7–11 mm.

(erect to divaricate or ascending), (5–)10–20(–40) mm, (stout).

Fruits

(usually purplish in age), didymous, irregular and somewhat angular, not highly inflated, 4–11 × 10–13 mm, (coriaceous, papery, shallowly grooved distally and on sides, tapered and narrowed toward replum, base obtuse to truncate, apex with broad sinus to nearly truncate);

valves (retaining seeds after dehiscence), densely pubescent, not silvery;

replum elliptic to obovate, as wide as or wider than fruit, base rounded, margins sparsely pubescent or glabrous, apex rounded (with funicles);

ovules 4 per ovary;

style 5–7 mm, (glabrous).

subglobose to ellipsoid, uncompressed, 4–6(–9) mm;

valves (not retaining seeds after dehiscence), glabrous or sparsely pubescent outside, trichomes sessile;

replum as wide as or wider than fruit;

ovules (8–)10–14(–16) per ovary;

style 1–2.5(–4) mm.

Seeds

flattened.

plump.

2n

= 60.

Physaria alpina

Physaria arctica

Phenology Flowering Jun–Jul. Flowering May–Aug.
Habitat Whitish or red substrates from limestone or dolomite, ridge crests, rocky alpine tundra and open areas Typically on sand and gravel from calcareous bedrock, river bars and terraces, cliff ledges, scree and talus slopes, often growing after disturbance
Elevation 3500-4000 m (11500-13100 ft) 0-1800 m (0-5900 ft)
Distribution
from FNA
CO
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; AB; BC; MB; NL; NT; NU; QC; YT; Greenland; circumarctic (except n Europe, ne Russia)
[BONAP county map]
Discussion

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 7, p. 624. FNA vol. 7, p. 626.
Parent taxa Brassicaceae > tribe Physarieae > Physaria Brassicaceae > tribe Physarieae > Physaria
Sibling taxa
P. acutifolia, P. alpestris, 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. 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
Synonyms Alyssum arcticum, Lesquerella arctica, Lesquerella arctica subsp. purshii, Vesicaria arctica, Vesicaria leiocarpa
Name authority Rollins: Brittonia 33: 339. (1981) (Wormskjöld ex Hornemann) O’Kane & Al-Shehbaz: Novon 12: 321. (2002)
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