Physaria newberryi |
Physaria parviflora |
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Newberry twinpod, Newberry's twinpod |
frosty bladderpod, Piceance bladderpod, Picenace 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 or branched; densely (silvery) pubescent, trichomes (irregularly radiate), 6–8-rayed, rays furcate or bifurcate, fused at base. | ||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
several from base, prostrate to decumbent, (usually unbranched, rarely branched distally), 1–3 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); blade broadly obovate, 1–2 cm, margins entire or with 1 or 2 broad teeth, (apex rounded to obtuse). |
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Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
blade oblanceolate to nearly oblong, similar to basal, (base cuneate), margins entire. |
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Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
(secund), loose, (elongated in fruit). |
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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 (yellowish), elliptic to lanceolate, (2–)3–4 mm; petals spatulate, (3.9–)5–7 mm. |
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Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
(recurved), 6–8(–12) 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), elliptic to subglobose, usually slightly compressed (latiseptate), 3–4 mm; valves densely pubescent, sometimes with scattered trichomes inside; ovules 4 per ovary; style ca. 3 mm. |
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Seeds | slightly flattened, (ovate). |
somewhat flattened. |
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Physaria newberryi |
Physaria parviflora |
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Phenology | Flowering Jun–Jul. | |||||
Habitat | Shale of steep slopes, rock crevices, ledges, canyon sides, shale-marlstone | |||||
Elevation | 2100-2700 m (6900-8900 ft) | |||||
Distribution |
AZ; NM; NV; UT
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CO
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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.) |
Of conservation concern. Physaria parviflora is known from the Parachute Creek Member of the Green River Formation, Rio Blanco County. (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. 657. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. didymocarpa var. newberryi | Lesquerella parviflora | ||||
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 |