Physaria acutifolia
Physaria carinata
double bladderpod, pointleaf twinpod, Rydberg's twinpod, sharpleaf twinpod
Idaho bladderpod
several from base, usually somewhat decumbent, (unbranched), (0.4–)0.5–2 dm.
simple from base, decumbent, (occasionally few-branched), 0.5–1.5(–2) dm.
(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).
blade elliptic to broadly obovate, triangular, rhombic, or round, 1.5–3(–4) cm, margins often sinuate or shallowly lobed.
blade spatulate to oblanceolate, 1–3 cm, margins entire, (apex usually obtuse).
(sessile or shortly petiolate);
blade elliptic to oblanceolate to obovate, 0.5–1.5 cm, (base narrowed to petiole), margins entire.
loose, (elongated in fruit).
compact to loose.
sepals linear-oblong, 4–7.5 mm;
petals spatulate, 6–11 mm.
sepals oblong to broadly elliptic, 4–7.5 mm, (lateral pair saccate or not);
petals spatulate, 7.5–10 mm.
(divaricate, slightly sigmoid or nearly straight), 6–12 mm.
(ascending or divaricate-spreading, straight to loosely sigmoid or curved), 4–10 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.
(sessile or substipitate), elliptic, suborbicular, or oblong, strongly compressed (angustiseptate), 5–9 mm, (rounded to sharply keeled on 1 side, edges ± keeled);
valves: (margins covering replum edges or not), usually pubescent throughout or, rarely, glabrous inside;
ovules (4–)8–14(–16) per ovary;
style 2–4.5(–5) mm.
(dark brown), flattened, (2–3 mm).
slightly flattened.
= 10, 16, 24.
Physaria acutifolia
Physaria carinata
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.)
Subspecies 3 (3 in the flora).
Differences in fruit morphology become blurred and the three subspecies are often indistinguishable where their ranges meet near the intersection of Idaho, Montana, and Wyoming.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Fruits elliptic, not keeled, valve margins (thin, rounded), not covering replum edges. | subsp. paysonii |
1. Fruits elliptic, suborbicular, or broadly oblong, keeled on one side, valve margins covering replum edges | → 2 |
2. Fruits elliptic, bases narrow-rounded to acute, apices ± acute. | subsp. carinata |
2. Fruits suborbicular to elliptic or broadly oblong, bases and apices rounded. | subsp. pulchella |
CalFlora
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
