Physaria chambersii
Physaria carinata
Chambers' bladder-pod, Chambers' physaria, Chambers' twinpod, double bladderpod
Idaho bladderpod
several from base, erect or decumbent (arising laterally, unbranched), 0.5–1.5 mm.
simple from base, decumbent, (occasionally few-branched), 0.5–1.5(–2) dm.
(petiole slender);
blade obovate to orbicular, 3–6 cm (width 10–20 mm), margins entire or dentate.
blade elliptic to broadly obovate, triangular, rhombic, or round, 1.5–3(–4) cm, margins often sinuate or shallowly lobed.
blade spatulate, 1–2 cm (width 3–6 mm), margins entire, (apex often acute).
(sessile or shortly petiolate);
blade elliptic to oblanceolate to obovate, 0.5–1.5 cm, (base narrowed to petiole), margins entire.
congested.
compact to loose.
sepals narrowly lanceolate, 5–8(–9) mm;
petals narrowly oblanceolate, 9–12 mm, (claw undifferentiated from blade).
sepals oblong to broadly elliptic, 4–7.5 mm, (lateral pair saccate or not);
petals spatulate, 7.5–10 mm.
(divaricate, slightly sigmoid), 8–15 mm.
(ascending or divaricate-spreading, straight to loosely sigmoid or curved), 4–10 mm.
(often purplish in age), didymous, subreniform, strongly inflated, 9–18 × 11–21(–30) mm, (papery, base obtuse to slightly cordate, apical sinus V-shaped or convex, open crests rounded);
valves (2-keeled on side away from replum, each 3-sided, keels rounded, sides flat or slightly convex, retaining seeds after dehiscence), evenly and densely pubescent;
replum oblong, as wide as or wider than fruits, apex obtuse;
ovules 4–12 per ovary;
style (4–)6–8 mm (exceeding sinus).
(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.
flattened.
slightly flattened.
= 8, 10, 16, 24.
Physaria chambersii
Physaria carinata
Physaria chambersii has been divided into three varieties based on whether the fruit is stipitate (var. canaani) or not, and whether the caudex elongates (var. sobolifera) or not (var. chambersii). In this species and in some others, e.g., P. newberryi, the latter character often depends on substrate and microclimate. Shifting substrates, such as moving sand and talus, often cause caudices to elongate. The species can be confused with 57. P. newberryi.
(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 |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
