Flora of North America species comparison

unarmed, densely hairy to glabrate.

persistent, alternate;

stipules absent;

petiole present;

blade: base cuneate to rounded, apex acute to acuminate [rounded or emarginate], surfaces densely hairy [glabrous] abaxially, usually glabrous adaxially.

fascicles or solitary flowers.

sepals 4–5[–6] in 1 whorl, imbricate, abaxially densely hairy;

petals (4–)5(–6)[–8], greenish white or greenish yellow, sericeous adaxially, lobes undivided, equaling or shorter than [exceeding] corolla tube;

stamens 4–5[–8], distinct;

staminodes absent [present];

pistil 3–5(–6)[–12]-carpellate;

ovary 3–6[–12]-locular, densely hairy;

placentation axile.

purple to black [yellow, orange, red, brown, green], ellipsoid to ovoid, glabrous [hairy].

1[–5], brown, laterally compressed;

hilum narrowly ovate to obovate;

embryo vertical;

endosperm present.

= [12, 13, 14,] 26.