Physaria newberryi |
Physaria brassicoides |
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Newberry twinpod, Newberry's twinpod |
double bladderpod, double 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; (somewhat compact); caudex branched, (relatively large); (silvery) pubescent throughout, trichomes (sessile), several-rayed, rays furcate, (slightly umbonate, tuberculate throughout). | ||||
Stems | several from base, ascending to erect (arising laterally, unbranched), 0.5–1(–2.5) dm. |
several from base, decumbent to ascending (arising laterally, unbranched, stout), (0.2–)0.5–1.7 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). |
(petiole somewhat winged); blades orbicular to obovate, 2–6 cm (width 1–2.5 cm, thick), margins usually repand, rarely entire, (adaxial surface scurfy). |
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Cauline leaves | blade linear-oblanceolate to oblanceolate, 1–2 cm, margins entire. |
blade oblanceolate to broadly spatulate, 1–2 cm (width 3–5 mm), margins entire, (apex obtuse to subacute). |
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Racemes | dense (elongated or not in fruit, 2.5–8.5(–10) cm). |
moderately dense (or elongated). |
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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 linear-oblong, 6–8 mm; petals spatulate, 9–12 mm. |
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Fruiting pedicels | (divaricate, straight), 5–11(–15) mm, (rigid, fruits not pendent on arching pedicels). |
(divergent, straight to somewhat curved or sigmoid), 5–12 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). |
(erect), didymous, cordate, moderately inflated, (6–)10–20 × 10–23 mm, (papery, base obtuse or with obscure sinus, apical sinus deep, broad); valves (retaining seeds after dehiscence), densely and loosely pubescent, trichomes spreading; replum linear-oblong, constricted, as wide as or wider than fruit; ovules 4 per ovary; style 4–5(–9) mm. |
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Seeds | slightly flattened, (ovate). |
plump, (broad). |
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2n | = 8, 16. |
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Physaria newberryi |
Physaria brassicoides |
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Phenology | Flowering May–Jun. | |||||
Habitat | Bare hillsides, dry gravel and clay soil, badlands, clay knolls, banks | |||||
Elevation | 900-1400 m (3000-4600 ft) | |||||
Distribution |
AZ; NM; NV; UT
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CO; MT; ND; NE; SD; 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. 628. | ||||
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) | Rydberg: Bull. Torrey Bot. Club 29: 237. (1902) | ||||
Web links |