Physaria geyeri |
Physaria alpina |
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Geyer's bladderpod, Geyer's twin-pod |
Avery Peak or alpine twinpod, Avery Peak twinpod |
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Habit | Perennials; caudex usually simple, (cespitose); (silvery) pubescent throughout, trichomes (sessile), 6–8-rayed, rays mostly furcate, (tuberculate to nearly smooth). | 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). | ||||
Stems | several from base, decumbent, (arising laterally, unbranched), 1–3 dm. |
few from base, decumbent, (arising laterally proximal to current season’s leaves), 0.3–0.8 dm. |
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Basal leaves | (numerous); (petiole slender, rarely with a few broad teeth); blade obovate, 3–7 cm, margins entire. |
(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). |
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Cauline leaves | blade oblanceolate, 1.5–3 cm, margins entire. |
(2–5 per stem); blade oblanceolate to spatulate, similar to basal, margins entire, (apex acute). |
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Racemes | loose. |
loose, (3–6-flowered). |
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Flowers | sepals oblong, 5–7 mm; petals (yellow to purplish), spatulate, 8–12 mm. |
sepals narrowly oblong to linear, 7–9 mm; petals (erect), spatulate, 10–12(–15) mm. |
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Fruiting pedicels | (ascending or spreading, slightly curved or sigmoid), 1–2 cm. |
(widely spreading to ascending, slightly curved or straight), 7–11 mm. |
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Fruits | obcordate, angustiseptate, somewhat inflated, (not bladdery), 5–7 × 6–9 mm, (papery, basal sinus absent, apical sinus broad and open); valves (retaining seeds after dehiscence), loosely pubescent, trichomes spreading; replum ovate, 5–7 mm, as wide as or wider than fruit, apex acute or obtuse; ovules 4–6 per ovary; style 5–7 mm. |
(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). |
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Seeds | flattened. |
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Physaria geyeri |
Physaria alpina |
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Phenology | Flowering Jun–Jul. | |||||
Habitat | Whitish or red substrates from limestone or dolomite, ridge crests, rocky alpine tundra and open areas | |||||
Elevation | 3500-4000 m (11500-13100 ft) | |||||
Distribution |
ID; MT; OR; WA
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CO
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 638. | FNA vol. 7, p. 624. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Vesicaria geyeri, Coulterina geyeri, Lesquerella geyeri | |||||
Name authority | (Hooker) A. Gray: Gen. Amer. Bor. 1: 162. (1848) | Rollins: Brittonia 33: 339. (1981) | ||||
Web links |