Flora of North America species comparison

alternate, simple;

stipules present, persistent;

petiole present, glands absent;

blade unlobed, margins serrate, laminar glands absent;

venation pinnate or weakly palmate at base, pinnate distally, secondary veins straight, closely spaced, and parallel [arched, moderately spaced].

bisexual (pistillate flowers proximal, staminate distal) [unisexual], axillary, spikes or racemes;

glands subtending each bract 0.

present or absent.

sepals 5, valvate, connate basally;

petals 5, distinct, adnate to base of staminal column, white;

nectary absent;

stamens 10, in 2 whorls, connate basally;

pistillode present, at top of staminal column.

sepals persistent, often enlarging in fruit, 5–8(–10), connate basally, unequal, small outer lobes often present alternating with larger lobes;

petals 5(–6) [often rudimentary], distinct, white;

nectary absent;

pistil 3-carpellate;

styles 3, connate basally [distinct], deeply multifid, branches [9–]12–21 per flower.

capsules, densely muricate.

subglobose;

caruncle absent.

= 11.