Flora of North America species comparison

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

usually ascending, rarely decumbent-ascending or suberect, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30–60 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 linear-lanceolate or linear-oblanceolate, 5–10 × 1–3 cm, usually ca. (3–)5–7 times as long as wide, usually widest near middle, thin or, occasionally, subcoriaceous, base cuneate, margins entire, flat or, occasionally, undulate near base, apex acute or attenuate.

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

terminal and axillary, terminal usually occupying distal 1/5–1/3 of stem, lax, interrupted at least in proximal 1/2, usually broadly paniculate (branches simple or with few 2d-order branches).

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

articulated in proximal 1/3 or almost near base, filiform, 3–8 mm, not more than 2–2.5 times as long as inner tepals, articulation indistinctly swollen.

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.

10–15(–20) in whorls;

inner tepals usually broadly triangular or deltoid, 2.5–3.5 × 2.2–3.3 mm, base truncate, margins minutely but distinctly denticulate, rarely subentire, apex obtuse or subacute;

tubercles absent, or only 1 midvein slightly swollen.

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

brown or dark reddish brown, 2 × 1.3 mm.

= 40.

= 20.