Physaria geyeri |
Physaria newberryi |
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Geyer's bladderpod, Geyer's twin-pod |
Newberry twinpod, Newberry's 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 simple or branched, (branches often covered with persistent leaf bases, cespitose); densely (silvery) pubescent, trichomes rays fused at least 1/2 their length. | ||||||||
Stems | several from base, decumbent, (arising laterally, unbranched), 1–3 dm. |
several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
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Basal leaves | (numerous); (petiole slender, rarely with a few broad teeth); blade obovate, 3–7 cm, margins entire. |
(ascending to erect, petiole slender); blade oblanceolate to obovate, 3–8 cm, (base tapering to petiole), margins incised or dentate with broad teeth, (apex acute to obtuse). |
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Cauline leaves | blade oblanceolate, 1.5–3 cm, margins entire. |
blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
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Racemes | loose. |
dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
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Flowers | sepals oblong, 5–7 mm; petals (yellow to purplish), spatulate, 8–12 mm. |
sepals (greenish yellow), lanceolate, 6–8.5 mm, (saccate and cucullate); petals spatulate to narrowly oblanceolate, 7–10(–12) mm. |
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Fruiting pedicels | (ascending or spreading, slightly curved or sigmoid), 1–2 cm. |
(divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
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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. |
didymous, sides curved and angular, highly inflated, 6–16 × 8–12 mm, (papery, apical sinus broad and concave); valves (retaining seeds after dehiscence, distinctly 2-keeled on side away from replum), pubescent, trichomes appressed; replum linear to linear-lanceolate, as wide as or wider than fruit, apex acute; ovules 4–8 per ovary; style 2–9 mm, (usually not exceeding sinus). |
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Seeds | slightly flattened, (ovate). |
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Physaria geyeri |
Physaria newberryi |
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Distribution |
ID; MT; OR; WA
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AZ; NM; NV; UT
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). Physaria newberryi, with its unusual fruits, can be confused with 15. P. chambersii. In P. chambersii, the sides of the fruit are flat, the style always exceeds the top, or shoulders, of the fruit, and shoulders form an angle that does not curve in toward the style. In P. newberryi, the sides of the fruit are concave, the styles are shorter than shoulders of the silicle (except in subsp. yesicola), and shoulders of the silicle form a curved, inward arching crown on the fruit. (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. 652. | ||||||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Vesicaria geyeri, Coulterina geyeri, Lesquerella geyeri | P. didymocarpa var. newberryi | ||||||||
Name authority | (Hooker) A. Gray: Gen. Amer. Bor. 1: 162. (1848) | A. Gray: in J. C. Ives, Rep. Colorado R. 4: 6. (1861) | ||||||||
Web links |