Flora of North America species comparison

ascending or, rarely, erect, usually producing axillary shoots near base, (10–)15–30(–40) cm.

ascending, ascending-decumbent, or erect, simple or producing axillary shoots below 1st-order inflorescence or at proximal nodes, 25–70 cm.

blades ovate-elliptic, obovate-elliptic, or ovate-lanceolate, (2–)4–12(–15) × 1–5(–6) cm, subcoriaceous, base narrowly to broadly cuneate, margins entire, flat or slightly undulate, apex acute or acuminate.

blades linear-lanceolate or lanceolate, 6–15(–17) × 2–4 cm, usually ca. 3.5–6 times as long as wide, widest near middle or nearly so, thin or rarely subcoriaceous, base cuneate, margins entire, undulate or slightly crisped, apex acute.

terminal and axillary, usually occupying distal 2/3 of stem/shoot, usually dense, or interrupted in proximal part, broadly paniculate.

terminal and axillary, terminal usually occupying distal 1/5–1/3 of stem, dense or occasionally interrupted near base, usually broadly paniculate (branches simple or with few 2d-order branches).

articulated near middle, filiform or slightly thickened, (8–)10–16 mm, articulation distinct, slightly swollen.

articulated in proximal 1/3, filiform, 3–7 mm, equaling or 1.5–2 times as long as inner tepals, articulation indistinctly swollen.

5–15 in whorls;

inner tepals distinctly double-reticulately veined, orbiculate or reniform-orbiculate, 13–18(–20) × (20–)23–30 mm, base deeply emarginate or cordate, margins entire, apex rounded, obtuse, rarely subacute, with short, broadly triangular tip;

tubercles absent, occasionally very small.

10–20(–25) in whorls;

inner tepals, broadly ovate to ovate-lanceolate, occasionally almost triangular, (2.5–)3–3.5 × 2–2.5 mm, base truncate or rounded, margins entire or indistinctly erose, apex obtuse or subacute;

tubercles 3 (occasionally 1 in var. monotylos Rechinger f., then very large, subequal or only slightly narrower than inner tepal), distinctly unequal (1 larger tubercle subequal or slightly narrower than inner tepal), usually smooth.

brown or dark brown, 5–7 × 4–6 mm.

dark reddish brown, 1.8–2.4 × 1–1.5 mm.

= 40.

= 20.