Physaria newberryi |
Physaria eburniflora |
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Newberry twinpod, Newberry's twinpod |
Devils Gate twinpod |
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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 usually simple; densely pubescent, trichomes (sessile), rays often furcate, fused toward base, (nearly smooth). | ||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
simple from base, prostrate, (arising lateral to rosette), 0.1–0.5 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 suborbicular, (1–)2.5(–3) cm, (base abruptly narrowed to petiole), margins entire, (flat), (surfaces densely silvery pubescent, trichomes in multiple layers, appressed). |
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Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
(2–4); blade oblanceolate, ca. 1 cm, (base cuneate), margins entire, (apex acute). |
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Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
condensed. |
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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 (erect, purplish to greenish), linear-oblong or boat-shaped, 5.5–6.5 mm, (lateral pair more saccate than median); petals (white), spatulate, 9–12 mm, (claw undifferentiated from blade). |
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Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
(divaricate-ascending, nearly straight), 6–10 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). |
strongly didymous, irregular in shape and size, (base slightly cordate, apex with a deep closed sinus), strongly to somewhat inflated, 6–8 × 6–8 mm (± bladderlike, papery); valves (retaining seeds after dehiscence), pubescent; replum elliptic to obovate, not constricted, as wide as or wider than fruit, apex obtuse; ovules 4–8 per ovary; style 4–5 mm, (sparsely pubescent or glabrous). |
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Seeds | slightly flattened, (ovate). |
plump. |
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Physaria newberryi |
Physaria eburniflora |
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Phenology | Flowering May–Jun. | |||||
Habitat | Limestone hills, red soil, rocky calcareous slopes, clay depressions, granite and marble detritus | |||||
Elevation | 1800-3000 m (5900-9800 ft) | |||||
Distribution |
AZ; NM; NV; UT
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WY |
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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.) |
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Key |
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Source | FNA vol. 7, p. 652. | FNA vol. 7, p. 635. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. didymocarpa var. newberryi | |||||
Name authority | A. Gray: in J. C. Ives, Rep. Colorado R. 4: 6. (1861) | Rollins: Brittonia 33: 333. (1981) | ||||
Web links |