Flora of North America species comparison

erect, branched above middle (only in inflorescence), 50–100 cm.

erect (some dwarf alluvial forms may be with ascending or almost prostrate branches), branched in distal 2/3, occasionally almost near base, (4–)15–60(–70) cm.

ocrea deciduous or partially persistent at maturity;

blade with large lateral veins alternating with short ones, oblong or oblong-lanceolate, 30–40(–50) × 10–12 cm, more than 3 times as long as wide, base broadly cuneate, truncate, or weakly cordate, margins entire or indistinctly repand, flat, apex obtuse or broadly acute.

ocrea mostly partially persistent at maturity;

blade lanceolate or lanceolate-linear, rarely oblong-lanceolate, (3–)5–25(–30) × (1–)1.5–3(–4) cm, more than 4 times as long as wide, base abruptly truncate, slightly cordate, or rarely broadly cuneate, margins entire or subentire to obscurely repand, normally undulate and crisped, apex acute very rarely subobtuse.

terminal, occupying distal 1/2 of stem, usually dense, narrowly paniculate.

terminal, occupying distal 1/2 of stem (occasionally most of stem), usually reddish brown or red (greenish yellow when mature), usually rather dense, interrupted in proximal part, broadly paniculate.

articulated in proximal 1/3, filiform, 6–16 mm, articulation indistinct.

articulated near base or at least in proximal 1/3, filiform, 3–7(–9) mm, articulation weakly evident, occasionally indistinctly swollen.

10–20 in whorls;

inner tepals ovate-triangular or subcordate, 5–6 × 4.5–6 mm, widest at or near middle, base weakly emarginate, margins entire, erose, or indistinctly denticulate mostly at base, apex abruptly narrowed, acute or subacute;

tubercles absent.

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

inner tepals narrowly triangular or narrowly rhombic-triangular, 1.5–2.5 × 0.7–0.9(–1.2) mm (excluding teeth), normally ca. 2 times as long as wide, base truncate or broadly cuneate, margins usually prominently dentate, rarely with shorter teeth, or almost entire, apex acute, straight, teeth 2–3, at each side of margins, subulate-filiform, bristlelike, straight, 1–3 mm, usually 1.5–2.5(–4) times as long as width of inner tepals;

tubercles 3, brownish or reddish, linear-lanceolate to fusiform, equal or subequal, rarely unequal, distinctly narrower than inner tepals, ca. 0.5 times as wide as inner tepals or less, apex acute or subacute, usually distinctly reticulate-pitted (especially in herbarium specimens).

deep brown to reddish brown, 2.5–4(–4.5) × 1.8–2.5 mm.

light brown, 1.1–1.4 × 0.6–0.8 mm.

= 120.

= 40.