Flora of North America species comparison

blade elliptic to suborbiculate, 1–4.5 ×0.5–3.5 cm, base cuneate to rounded, apex apiculate to abruptly acuminate.

opposite;

blade venation brochidodromous.

1 or 3-flowered, axillary, solitary flowers or dichasia.

5–30 mm.

calyx open, lobes persistent, 2–3(–4) mm;

petals 3–5 mm.

4-merous, sessile or pedicellate;

hypanthium obconic to campanulate;

calyx green, lobes distinct;

petals white;

stamens 170–300;

ovary 2-locular;

ovules 6–14 per locule.

berries, dark purple, subglobose, crowned by calyx lobes.

to ca. 10 mm.

3–6 mm.

1–16, lenticular;

seed coat membranous;

embryo lenticular;

cotyledons suborbicular, separate, thinly plano-convex;

hypocotyls cylindrical, about as long as cotyledons.