Physaria newberryi |
Physaria humilis |
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Newberry twinpod, Newberry's twinpod |
St. Mary's Peak or bitterroot 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, (thickened with persistent leaf bases); densely (silvery) pubescent, trichomes 5- or 6-rayed, rays furcate or 3-branched. | ||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
simple or few to several from base, prostrate, (from below a terminal rosette of leaves, unbranched), 0.2–0.5 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). |
blade elliptic to broadly ovate or obovate, (1–)1.5–2.5(–3) cm, margins entire, (apex obtuse). |
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Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
blade spatulate, 3–7 mm, (base cuneate), margins entire. |
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Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
not loose, (scarcely elongated in fruit, 3–5-flowered). |
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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), narrowly elliptic to narrowly long-triangular, 3.7–5 mm; petals oblanceolate to nearly obovate, 7–8.5 mm, (abruptly tapering to narrow claw). |
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Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
(straight or slightly curved). |
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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). |
wider than long, apex truncate to shallowly notched, compressed (angustiseptate), 3–4 mm; valves densely pubescent, trichomes ascending to erect, sparsely pubescent inside; ovules 4 per ovary; style 2–3 mm. |
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Seeds | slightly flattened, (ovate). |
plump, (slightly compressed). |
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Physaria newberryi |
Physaria humilis |
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Phenology | Flowering Jun-early Aug. | |||||
Habitat | Steep slopes, dry summits, rocky fellfields, dry ledges | |||||
Elevation | 2700-2900 m (8900-9500 ft) | |||||
Distribution |
AZ; NM; NV; UT
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MT |
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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 humilis is found in metamorphosed rock and detritus on the peaks of the Bitterroot Mountains. (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. 644. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. didymocarpa var. newberryi | Lesquerella humilis | ||||
Name authority | A. Gray: in J. C. Ives, Rep. Colorado R. 4: 6. (1861) | (Rollins) O’Kane & Al-Shehbaz: Novon 12: 324. (2002) | ||||
Web links |