Flora of North America species comparison

erect (some dwarf alluvial forms may be ascending or almost prostrate), branched in distal 2/3, occasionally almost near base, (5–)15–75(–100) cm.

erect, branched in distal 2/3, sometimes branched almost from base or with few flowering stems from rootstock, 30–70(–90) cm.

ocrea deciduous to partially persistent at maturity;

blade lanceolate or lanceolate-linear, rarely oblong-lanceolate, usually very gradually narrowed at both ends, (4–)7–25(–40) × (1–)1.5–4(–5) cm, at least 4 times as long as wide, base narrowly cuneate, very rarely broadly cuneate, margins entire, flat or rarely weakly undulate, apex acute, very rarely subobtuse.

ocrea deciduous to partially persistent at maturity;

blade oblong-lanceolate, obovate-lanceolate, or lanceolate, normally (5–)10–30 × 2.5–6 cm, base rounded, truncate, or subcordate, rarely cuneate, margins entire to obscurely repand, flat to slightly undulate, apex acute or subacute, occasionally attenuate.

terminal, occupying distal 1/2 of stem, occasionally most of stem, golden or greenish yellow, usually rather dense or interrupted in proximal part, broadly paniculate, branches spreading.

terminal, occupying distal 2/3 of stem, lax, interrupted, broadly paniculate, branches simple or nearly so;

panicle leafless or leafy only near base.

articulated near base or at least in proximal 1/3, filiform, 3–8 mm, articulation weakly evident.

articulated in proximal 1/3 or rarely near middle, filiform, (2–)4–6(–8) mm, normally distinctly longer than inner tepals, articulation distinctly swollen.

15–30 (occasionally more) in rather dense whorls;

inner tepals narrowly triangular or narrowly rhombic-triangular, 2.5–3(–3.5) × 0.75–1.2(–1.5) mm (excluding teeth), normally ca. 2 times as long as wide, base truncate or broadly cuneate, margins prominently dentate, apex acute, very rarely subacute, straight, teeth 2–3(–4), normally at each side of margins, subulate-filiform, bristlelike, 1–3.5 mm, usually 1.5–2 times as long as width of inner tepals;

tubercles 3, equal or subequal, apex acute or subacute, smooth.

10–20 in lax, remote whorls;

inner tepals oblong-lanceolate, oblong, or lingulate, 2–3 × 0.8–1.3(–1.8) mm, ca. 2 times as long as wide, base cuneate or subtruncate, margins entire, apex obtuse;

tubercle 1 (occasionally 3, then 1 much larger, almost as wide as inner tepals).

light brown, small, 0.9–1.75 × 0.6–1 mm.

usually dark reddish brown to almost black, 1.25–1.5(–1.8) × 1–1.3 mm.

= 40.

= 20.