Flora of North America species comparison

simple, 20–40 cm.

in basal rosette and cauline, basal weakly 3-lobed, cauline (2), opposite, (1 pair), deeply 3-lobed, reduced, similar to basal;

stipules narrow, not decurrent on petiole, (margins fimbriate);

petiole to 9 cm;

blade dark green or reddish green, reniform, (base ligulate), surfaces sparsely hairy.

solitary flowers or 1–3, (lax), nodding, 2–5(–8)-flowered racemes, simple, (10–40 cm).

1.5–2 times longer than hypanthium.

persistent, fragrant, vertical;

hypanthium turbinate, elongating in fruit, open at throat, (length 2 times diam.);

sepals erect, becoming wide-spreading after anthesis, triangular;

petals (exserted), widely spreading, white, ovate, narrowly clawed, unlobed, (bowl-shaped), 4–8 mm, ultimate margins entire;

ovary 1/2 inferior;

styles included in fruit;

stigma papillae apical.

0.4 mm, tuberculate (tubercles in 3–19 rows, blunt or spinelike).

= 14 + 1.