Flora of North America species comparison

thickened, usually simple, rarely branched, (subterranean).

usually simple, rarely few from base, well-exserted, prostrate to decumbent.

few to several from base, prostrate to decumbent or erect, (usually unbranched), 0.3–1.5(–3) dm.

blade margins entire.

(petiole slender);

blade suborbicular to obovate or elliptic, 1–8 cm, (base narrowing gradually or abruptly to petiole), margins sinuate-dentate or entire.

(proximal shortly petiolate, distal sessile);

blade oblanceolate, 0.5–1.5(–2.5) cm, margins entire or remotely dentate.

dense or loose.

sepals elliptic or oblong-elliptic, 4.5–7 mm, (median pair cucullate);

petals spatulate, 7–9(–14) mm, (claw undifferentiated from blade).

(sigmoid or curved), 5–10(–15) mm.

(slightly longer than broad), not conspicuously compressed at margins, apex somewhat compressed and usually not conspicuously beaked;

valves usually glabrous, sometimes sparsely pubescent inside;

ovules 8–12 per ovary;

style usually straight.

(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).

inner surface flattened, outer convex.