Flora of North America species comparison

simple or branched from base, erect.

simple or branched, erect, ascending, or sprawling.

blades ovate to broadly ovate, distal blades becoming ovate-lanceolate to lanceolate, 7-15 × 5-10 cm, base truncate to cordate, margins coarsely dentate, apex acute to caudate;

cystoliths rounded or occasionally elongate.

blades elliptic, lanceolate, ovate, or orbiculate, margins dentate to serrate;

cystoliths rounded or ± elongate.

racemose, elongate.

axillary, lax, of cymes arranged in racemes or panicles.

unisexual, staminate and pistillate in separate inflorescences, or with a few pistillate flowers at apex of staminate inflorescences, subsessile to short-pedunculate.

unisexual, staminate and pistillate flowers in loose to tight clusters in separate inflorescences or intermixed in same inflorescence on same or different plants;

bracts narrowly triangular to lanceolate, lacking hooked hairs.

tepals 4, distinct, equal;

stamens 4;

pistillode cuplike.

outer tepals lanceolate to narrowly ovate, 0.8-1 mm, inner tepals broadly ovate, 1.4-2.2 × 1.3-1.4 mm.

tepals 4, distinct, inner 2 equal to achene, outer 2 smaller, without hooked hairs;

staminodes absent;

style absent;

stigma tufted, persistent or deciduous.

ovoid, 1.4-1.6 × 1-1.1 mm.

sessile, laterally compressed, ovoid or deltoid, loosely enclosed by inner tepals.

= 12, 13.

= 26.