Physaria chambersii
Physaria occidentalis
Chambers' bladder-pod, Chambers' physaria, Chambers' twinpod, double bladderpod
western bladder-pod
several from base, erect or decumbent (arising laterally, unbranched), 0.5–1.5 mm.
few to several from base, prostrate to decumbent or erect, (usually unbranched), 0.3–1.5(–3) dm.
(petiole slender);
blade obovate to orbicular, 3–6 cm (width 10–20 mm), margins entire or dentate.
(petiole slender);
blade suborbicular to obovate or elliptic, 1–8 cm, (base narrowing gradually or abruptly to petiole), margins sinuate-dentate or entire.
blade spatulate, 1–2 cm (width 3–6 mm), margins entire, (apex often acute).
(proximal shortly petiolate, distal sessile);
blade oblanceolate, 0.5–1.5(–2.5) cm, margins entire or remotely dentate.
congested.
dense or loose.
sepals narrowly lanceolate, 5–8(–9) mm;
petals narrowly oblanceolate, 9–12 mm, (claw undifferentiated from blade).
sepals elliptic or oblong-elliptic, 4.5–7 mm, (median pair cucullate);
petals spatulate, 7–9(–14) mm, (claw undifferentiated from blade).
(divaricate, slightly sigmoid), 8–15 mm.
(sigmoid or curved), 5–10(–15) 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).
(erect), ellipsoid to obovoid, compressed at apex and sometimes margins (strongly latiseptate), (5–)6–9 mm, (apex acute, often beaked);
valves densely pubescent, trichomes appressed or spreading, sometimes sparsely pubescent inside, trichomes 4- or 5-rayed;
ovules 4–12 per ovary;
style (2–)3–6.5 mm, (often sparsely pubescent).
flattened.
inner surface flattened, outer convex.
= 8, 10, 16, 24.
Physaria chambersii
Physaria occidentalis
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 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Stems erect or decumbent; fruit margins and apices compressed, apices often beaked; valves pubescent inside; ovules 4-8 per ovary; styles frequently curved; n California, c Idaho, nw Nevada, Oregon, Washington. | subsp. occidentalis |
1. Stems prostrate to decumbent; fruit, margins not conspicuously compressed, apices somewhat compressed, usually not conspicuously beaked; valves usually glabrous, sometimes sparsely pubescent inside; ovules 8-12 per ovary; styles usually straight; Nevada, w Utah. | subsp. cinerascens |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
WA
