Flora of North America species comparison

petiole 2–10 cm, sparsely pubescent;

blade ovate, deeply 5–7-lobed, cleft 1/2+ to midrib, (1.5–)2–10(–22) cm, base cordate, surfaces with yellow, dull, sessile glands and sparse hairs abaxially, with yellow, shiny, sessile glands and glabrous adaxially, lobes with main segments ovate-lanceolate, margins 1–2 times sharply serrate, apex acute, shallowly lobed.

ascending to erect, 20–50-flowered racemes, (10–)15–30 cm, axis sparsely pubescent, flowers evenly spaced.

jointed, 5–12 mm, pubescent and glandular;

bracts conspicuous, proximal ones ovate, lobed, distal ones narrowly oblong, unlobed, (3–)4–5 mm, sparsely glandular and pubescent.

hypanthium green, saucer-shaped, widely flared, 0.5–1.5 mm, ± pubescent and sparsely glandular abaxially, glabrous adaxially;

sepals nearly to somewhat overlapping, spreading, brownish purple to greenish or sometimes nearly white, ovate-lanceolate to oblong-lanceolate, 3–5 mm;

petals widely separated, erect, white, cuneate-flabelliform, not conspicuously revolute or inrolled, 1 mm;

nectary disc wine red, thick, lobed, covering and submerging ovary;

stamens slightly longer than petals;

filaments linear to slightly broader at base, 1 mm, glabrous;

anthers white, transversely oblong-cordate, 0.5 mm, broader than long, apex shallowly notched;

ovary somewhat hairy and densely sessile-glandular;

styles connate 1/4–1/2 their lengths, 1 mm, glabrous or hairy.

bland, black, subglobose, 8–10 mm, glandular.

= 16.