Physaria ovalifolia |
Physaria oregona |
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roundleaf bladderpod |
Oregon twin-pod |
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Habit | Perennials; caudex simple or branched, (thickened by persistent leaf bases); densely pubescent (foliage usually scabrous), trichomes (sessile or short-stalked), several-rayed, rays furcate near base, (usually strongly umbonate, roughly tuberculate, less so over umbo). | Perennials; caudex simple, (cespitose); (silvery) pubescent throughout, trichomes (stalked), few-rayed, rays furcate or imperfectly so, (tuberculate throughout). | ||||
Stems | few to several from base, erect or outer decumbent, 0.5–2.5 dm. |
several from base, erect or somewhat decumbent, (unbranched), 1–3.5 dm. |
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Basal leaves | blade suborbicular to elliptic or ovate or deltate, 0.5–2(–6.5) cm, margins entire or shallowly dentate. |
(petiole slender, usually incised or with broad teeth along petiole); blade obovate, 4–6 cm, margins entire. |
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Cauline leaves | (proximal shortly petiolate, distal usually sessile); blade narrowly elliptic or obovate, (0.5–)1–2.5(–4) cm, margins entire. |
blade oblanceolate or broader, 1.5–2.5 cm, margins entire or sparsely dentate, (apex acute). |
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Racemes | compact, (± subumbellate to densely corymbiform, elongated or not). |
somewhat loose, (5–15 cm). |
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Flowers | sepals ± elliptic, 4.5–7(–8.5) mm, (median pair thickened apically); petals (sometimes white), suborbicular to obovate or obdeltate, 6.5–15 mm, (base narrowing to broad claw, apex sometimes emarginated). |
sepals oblong, 5–7 mm; petals (lemon yellow), spatulate, 9–12 mm. |
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Fruiting pedicels | (usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout). |
(spreading or ascending, curved, fruits not pendent), 10–20 mm. |
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Fruits | (sessile or shortly stipitate, less than 1 mm), subglobose to broadly ellipsoid, inflated or slightly compressed (terete or subterete), (4–)5–8(–9) mm; valves (not retaining seeds after dehiscence), glabrous; replum as wide as or wider than fruit; ovules 8–16 per ovary; style 4–8(–9) mm. |
didymous, obreniform, moderately inflated, angustispetate, (8–)10–12(–15) × 10–14(–16) mm, (papery, not keeled, basal sinus absent, apical sinus broad and open); valves (retaining seeds after dehiscence, rounded or irregular), loosely pubescent, trichomes spreading; replum broadly lanceolate, as wide as or wider than fruit, apex acute; ovules 8 per ovary; style 1–2 mm. |
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Seeds | flattened. |
flattened. |
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2n | = 8. |
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Physaria ovalifolia |
Physaria oregona |
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Phenology | Flowering Apr–Jun. | |||||
Habitat | Gravelly banks, stream shores, rocky slopes, dry hillsides, serpentine soils | |||||
Elevation | 900-1900 m (3000-6200 ft) | |||||
Distribution |
CO; KS; NE; NM; OK; TX
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ID; OR; WA
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 655. | FNA vol. 7, p. 655. | ||||
Parent taxa | Brassicaceae > tribe Physarieae > Physaria | Brassicaceae > tribe Physarieae > Physaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Lesquerella ovalifolia, Lesquerella engelmannii subsp. ovalifolia | Coulterina oregona, Lesquerella oregona | ||||
Name authority | (Rydberg) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) | S. Watson: Proc. Amer. Acad. Arts 17: 363. (1882) | ||||
Web links |