Flora of North America species comparison

usually erect, rarely ascending, branched above middle, 25–90(–100) cm.

ocrea prominent and persistent at maturity, whitish or silvery white, membranous;

blade oblong, oblong-elliptic, or obovate-lanceolate, (5–)8–30 × 2–8(–12) cm, base cuneate or narrowly cuneate, margins entire, flat or indistinctly crisped, apex acute or acuminate, rarely obtuse.

blades variable, cuneate, truncate, rounded, or cordate at base, but never hastate or sagittate, unlobed or in some species with rounded basal lobes.

terminal, occupying distal 1/2 of stem, narrowly paniculate, rarely simple.

articulated near middle or in proximal 1/3, filiform, 5–15(–20) mm, articulation indistinct.

articulated near middle or in proximal part (sometimes articulation indistinct).

5–20 in whorls;

inner tepals oblong-cordate or orbiculate-cordate, 11–16 × 9.5–14 mm, base sinuate or emarginate, margins entire, rarely with few extremely small denticles at base, apex obtuse or subacute;

tubercles absent.

normally bisexual or, sometimes, bisexual and unisexual (staminate and pistillate on same plant) within same inflorescence;

outer tepals normally angled towards inner tepals, or sometimes spreading;

inner tepals distinctly enlarged, always distinctly wider and longer than achene;

tubercles present or absent.

brown or reddish brown, 4–5(–7) × 2.5–4.5(–5) mm.

= 40.