Physaria geyeri |
Physaria acutifolia |
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Geyer's bladderpod, Geyer's twin-pod |
double bladderpod, pointleaf twinpod, Rydberg's twinpod, sharpleaf 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; caudex branched, (sometimes forming a thick crown, cespitose); (silvery) pubescent throughout, trichomes several-rayed, rays furcate, (moderately tuberculate, rays weakly so). | ||||
Stems | several from base, decumbent, (arising laterally, unbranched), 1–3 dm. |
several from base, usually somewhat decumbent, (unbranched), (0.4–)0.5–2 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, often narrowly winged); blade obovate to orbicular or rhombic-orbicular, 2–9 cm, (base abruptly narrowed to petiole), margins usually entire, rarely with few scattered teeth, (apex rounded or obtuse, sometimes with apical mucro). |
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Cauline leaves | blade oblanceolate, 1.5–3 cm, margins entire. |
blade spatulate to oblanceolate, 1–3 cm, margins entire, (apex usually obtuse). |
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Racemes | loose. |
loose, (elongated in fruit). |
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Flowers | sepals oblong, 5–7 mm; petals (yellow to purplish), spatulate, 8–12 mm. |
sepals linear-oblong, 4–7.5 mm; petals spatulate, 6–11 mm. |
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Fruiting pedicels | (ascending or spreading, slightly curved or sigmoid), 1–2 cm. |
(divaricate, slightly sigmoid or nearly straight), 6–12 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. |
(erect), didymous, suborbicular, inflated, (4–)6–15 × (4–)8–20 mm, (papery, basal and apical sinuses similar, basal rarely shallower, apical deep, narrow and closed or nearly so); valves retaining seeds after dehiscence, pubescent, trichomes appressed; replum oblong, constricted, 2–3.5 mm, narrower than fruit, apex obtuse; ovules (2 or) 4 per ovary; style 4–6(–9) mm. |
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Seeds | (dark brown), flattened, (2–3 mm). |
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2n | = 10, 16, 24. |
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Physaria geyeri |
Physaria acutifolia |
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Phenology | Flowering May–Jun(-Jul). | |||||
Habitat | Hillsides, roadcuts, sagebrush, pinyon-juniper, Gambel oak, ponderosa pine communities | |||||
Elevation | 1500-3500 m (4900-11500 ft) | |||||
Distribution |
ID; MT; OR; WA
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AZ; CO; ID; MT; NM; NV; SD; UT; WY
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Physaria acutifolia tends to be somewhat dwarfed, with a branched caudex and especially long styles (var. stylosa), where it grows at high elevations, especially at the western end of the Uinta Mountains in Utah. Intermediates form an uninterrupted cline and no infraspecific taxa are here recognized. In R. C. Rollins (1939), the discussion of P. acutifolia actually pertains to P. rollinsii. The discussion of P. australis pertains to what is now known as P. acutifolia. The plants are usually found in open soil patches, rarely into the subalpine or alpine tundra. (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 | P. acutifolia var. stylosa, P. australis, P. didymocarpa var. australis, P. stylosa | ||||
Name authority | (Hooker) A. Gray: Gen. Amer. Bor. 1: 162. (1848) | Rydberg: Bull. Torrey Bot. Club 28: 279. (1901) | ||||
Web links |