Flora of North America species comparison

dark brown to ± black (when dry), fibrous.

erect, scapose, or nearly scapose with very slender rhizomes, (3-)5-20(-30) cm, glabrous.

mostly erect, sometimes reclining, (20-)30-60(-150) cm, glabrous, from rhizomes or branched caudices.

blade 2x-pinnately compound, proximal primary divisions ternate;

leaflets cuneate-obovate to orbiculate, apically 3-5-lobed, 2-10 mm, surfaces glabrous.

blade green, (2-)3-4x-ternately compound, membranous;

leaflets obliquely orbiculate or nearly cordate, apically 3-lobed, (5-)10-20 × (6-)8-12(-18) mm wide, lobe margins crenate, surfaces abaxially often glandular.

racemes, usually elongate, few flowered.

terminal and axillary, panicles, open and leafy, many flowered.

pedicels recurved in fruit;

sepals early deciduous, purplish tinged, ovate or elliptic, 1-2.3(-2.7) mm;

stamens 8-15;

filaments purple;

anthers bright yellow, 1.5-3 mm;

stigmas purple.

sepals whitish or greenish, in staminate flowers ovate to elliptic, 3-5 mm; in pistillate flowers ovate to rhombic or broadly lanceolate, 1.5-2 mm;

filaments deep yellow or purplish, 4-7.5 mm;

anthers 2.2-3.4 mm, apiculate with tip to 0.8 mm;

stigma purplish.

2-6, nearly sessile;

body lance-obovoid, 2-3.5 mm, with thick veins.

7-11(-14), not reflexed, sessile to short-stipitate;

stipe 0-2 mm;

body oblanceolate to obliquely obovate-elliptic, strongly laterally compressed, (5-)9(-11) mm, glandular or glabrous, 3-4(-5)-veined on each side, veins ± parallel, converging toward ends (rarely branched or sinuous), not anastomosing-reticulate;

beak 1.5-4 mm.

= 14, 21.