Flora of North America species comparison

erect, unbranched or branched (few) distally.

5–15 dm, (stout).

basal and cauline;

petiolate;

basal not rosulate, long-petiolate, (soon withered);

cauline petiolate, blade (base hastate, not auriculate), margins entire or proximalmost lobed.

petiole 6–15 cm (shorter distally);

blade deltate to lanceolate, lyrate, or sinuately lobed, or (distally) narrowly lanceolate, 5–20 cm × 30–70 mm (smaller distally), margins entire or subapically denticulate, apex acute.

(reflexed at anthesis, several-flowered, lax, proximal flowers sometimes bracteate), considerably elongated in fruit.

sepals ascending, narrowly lanceolate, lateral pair not saccate basally;

petals (ascending), white, linear, (only slightly longer than sepals, slightly crisped), claw obovate or oblanceolate, (distinctly wider than blade);

stamens subequal (well-exserted beyond petals);

filaments slightly dilated basally;

anthers linear, (apiculate, coiled after dehiscence);

nectar glands confluent, lateral annular or semi-annular, median glands present.

sepals yellowish green, 4–6 × 1–1.5 mm;

petals white, 5–7 mm, blade 2.5–4 × 0.5–1 mm, claw 2–3.5 × 1–1.7 mm, margins dentate or incised (sublaciniate);

filaments 5–9 mm;

anthers 2.5–3.5 mm;

gynophore (1–)2–8(–10) mm.

straight or curved upward, stout.

5–12 mm, (thicker than gynophore).

long-stipitate, linear, subtorulose, subterete or slightly compressed;

valves each with prominent midvein extending full-length;

replum rounded;

septum complete;

ovules 40–60 per ovary;

style obsolete or distinct;

stigma capitate, entire.

divaricate, 4–13 cm × 1.5–2.5 mm;

style obsolete or, rarely, to 0.5 mm.

uniseriate, plump, winged distally, oblong;

seed coat not mucilaginous when wetted;

cotyledons obliquely accumbent.

brown, 3–5 × 1.7–2.2 mm;

wing to 0.7 mm wide.