Physaria newberryi |
Physaria obdeltata |
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Newberry twinpod, Newberry's twinpod |
Middle Butte bladderpod |
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Habit | 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. | Perennials; caudex simple; densely pubescent, trichomes (appressed in layers), 5–7-rayed, rays usually bifurcate, sometimes furcate, (thickened toward center). | ||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
simple from base, prostrate to decumbent, (unbranched, from within and below leaf clusters, slender), 0.2–0.8 dm. |
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Basal leaves | (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). |
(tufted, erect or ascending, silvery); blade linear to oblanceolate or (outer) oblanceolate to obovate or rhombic, 1.5–3.3 cm, (base sometimes subhastate), margins entire or dentate, (often involute). |
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Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
blade nearly linear, to 1.5 cm, margins entire. |
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Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
dense, (subcorymbose). |
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Flowers | sepals (greenish yellow), lanceolate, 6–8.5 mm, (saccate and cucullate); petals spatulate to narrowly oblanceolate, 7–10(–12) mm. |
sepals (yellow-green), lanceolate, (2.5–)3.5–4.5 mm; petals spatulate to oblanceolate, 4–6.5 mm. |
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Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
(recurved), 5–8 mm. |
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Fruits | 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). |
(usually pendent), obdeltate, compressed (angustiseptate), 2–4 mm, (wider than long, base tapered to acute angle, apex truncate with inflated shoulders); valves densely pubescent; (septum obsolete or with a narrow fringe inside of replum, funicles attached close to replum apex); ovules 4 per ovary; style 2–4 mm, (slender). |
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Seeds | slightly flattened, (ovate). |
plump, (mucilaginous when wetted). |
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Physaria newberryi |
Physaria obdeltata |
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Phenology | Flowering Jun(-Jul). | |||||
Habitat | Clayey, silty, or gravelly soils, overlaying basalt lava flows, silty playas, sagebrush, barren areas | |||||
Elevation | 1300-1700 m (4300-5600 ft) | |||||
Distribution |
AZ; NM; NV; UT
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ID |
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Discussion | 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.) |
Physaria obdeltata is known from the eastern Snake River Plain. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 652. | FNA vol. 7, p. 654. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. didymocarpa var. newberryi | Lesquerella obdeltata | ||||
Name authority | A. Gray: in J. C. Ives, Rep. Colorado R. 4: 6. (1861) | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | ||||
Web links |