Flora of North America species comparison

terete, sparsely scurfy when young.

mainly 0.5–4(–5) dm;

stems usually branched from base, terete, stout, angled;

herbage scurfy.

petiole to 1/2 as long as blade (becoming subsessile distally);

blade green or finally stramineous, (10–)20–50 × 6–30 mm, firm, base abruptly acute to narrowly cuneate, apex acute to attenuate, sparsely scurfy.

alternate or proximalmost subopposite, short petiolate or distal ones sessile;

petiole 2–5 mm;

blade cordate-ovate or subreniform to ovate to deltoid-ovate or oval, mainly 6–40 × 4–30 mm, base truncate to subcordate or broadly cuneate, margin entire or in some subhastately lobed or sometimes undulate-dentate, apex acute to rounded.

in sessile glomerules in distal axils, often mixed with pistillate ones, staminate calyx deeply 5-cleft;

lobes obtuse, not appendaged.

with calyx of (1–)3(–5) hyaline sepals.

usually in fascicles of 1–3 in proximal axils.

dark reddish brown, 1–1.5 mm.

brownish to whitish, 1.5–2.3 mm.

bracteoles sessile or stipitate, 6–12 × 4–7 mm, margin mostly 3-lobed, with elongate terminal lobe triangular to lanceolate, 2 short rounded lobes at base or sides merely rounded at base, united to beyond middle.

bracteoles monomorphic or dimorphic, larger ones on stipes (2–)4–8(–15) mm, others sessile, united at base, round-triangular or suborbicular, 4–6 mm, irregularly and coarsely dentate and with ± densely beset with flat, cristate, or hornlike appendages, smaller bracteoles (lacking or rare in var. asterocarpa) in same axils, oblong to cuneate, 3–4 mm, apex truncate, dentate only at summit, faces smooth.

glomerules in distal axils or in short, naked, terminal (early deciduous) panicles;

flowers with 5-parted calyx.

= 18.