Physaria ovalifolia
Physaria acutifolia
roundleaf bladderpod
double bladderpod, pointleaf twinpod, Rydberg's twinpod, sharpleaf twinpod
few to several from base, erect or outer decumbent, 0.5–2.5 dm.
several from base, usually somewhat decumbent, (unbranched), (0.4–)0.5–2 dm.
blade suborbicular to elliptic or ovate or deltate, 0.5–2(–6.5) cm, margins entire or shallowly dentate.
(petiole slender, often narrowly winged);
blade obovate to orbicular or rhombic-orbicular, 2–9 cm, (base abruptly narrowed to petiole), margins usually entire, rarely with few scattered teeth, (apex rounded or obtuse, sometimes with apical mucro).
(proximal shortly petiolate, distal usually sessile);
blade narrowly elliptic or obovate, (0.5–)1–2.5(–4) cm, margins entire.
blade spatulate to oblanceolate, 1–3 cm, margins entire, (apex usually obtuse).
compact, (± subumbellate to densely corymbiform, elongated or not).
loose, (elongated in fruit).
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 linear-oblong, 4–7.5 mm;
petals spatulate, 6–11 mm.
(usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout).
(divaricate, slightly sigmoid or nearly straight), 6–12 mm.
(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.
(erect), didymous, suborbicular, inflated, (4–)6–15 × (4–)8–20 mm, (papery, basal and apical sinuses similar, basal rarely shallower, apical deep, narrow and closed or nearly so);
valves retaining seeds after dehiscence, pubescent, trichomes appressed;
replum oblong, constricted, 2–3.5 mm, narrower than fruit, apex obtuse;
ovules (2 or) 4 per ovary;
style 4–6(–9) mm.
flattened.
(dark brown), flattened, (2–3 mm).
= 10, 16, 24.
Physaria ovalifolia
Physaria acutifolia
Subspecies 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Physaria acutifolia tends to be somewhat dwarfed, with a branched caudex and especially long styles (var. stylosa), where it grows at high elevations, especially at the western end of the Uinta Mountains in Utah. Intermediates form an uninterrupted cline and no infraspecific taxa are here recognized. In R. C. Rollins (1939), the discussion of P. acutifolia actually pertains to P. rollinsii. The discussion of P. australis pertains to what is now known as P. acutifolia. The plants are usually found in open soil patches, rarely into the subalpine or alpine tundra.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Caudices branched (well-developed); petals usually yellow, rarely white, 6.5-12(-14) mm, usually 1.5 times or less as long as sepals; racemes usually not elongated (subumbellate). | subsp. ovalifolia |
1. Caudices usually simple; petals white, (9-)11-15 mm, often 2 times as long as sepals; racemes usually elongated. | subsp. alba |
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