Flora of North America species comparison

erect or ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30–60(–90) cm.

procumbent, occasionally ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 20–50(–60) cm.

blades light green to yellowish green, linear-lanceolate, occasionally lanceolate, 6–14 × 1–3.5(–4) cm, usually ca. 5–7 times as long as wide, widest near middle, thin, not coriaceous, base cuneate, margins entire, flat or undulate, apex acute or attenuate.

blades ovate-lanceolate, elliptic-lanceolate, or ovate-elliptic, 3–12 × 1–5 cm, usually not more than 2–3.5 times as long as wide, widest near middle or occasionally in proximal 1/2, thick, coriaceous, base broadly cuneate, occasionally almost truncate or cuneate, margins entire, flat, apex acute.

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

terminal and axillary, terminal usually occupying distal 1/3–1/2 of stem, dense or interrupted only near base, usually broadly paniculate (branches simple or nearly so).

articulated in proximal 1/3 or almost near base, filiform (thickened distally), 4–7 mm, not more than 2–2.5 times as long as inner tepals, articulation indistinctly swollen.

articulated in proximal 1/3 or almost near base, usually rather thick, 4–9 mm, not more than 2–2.5 times as long as inner tepals, articulation distinctly swollen.

10–20 in whorls;

inner tepals broadly ovate-triangular, occasionally broadly triangular, 3.5–4.5(–5) × 3.5–4(–5) mm, base truncate or indistinctly cordate, margins entire or indistinctly erose, apex obtuse or subacute;

tubercles 3, equal or subequal (much narrower than inner tepals).

10–25 in whorls;

inner tepals broadly ovate, ovate, or lingulate-deltoid, (3–)4–5 × (2.5–)3–4 mm, base rounded or subtruncate, margins entire or indistinctly erose, apex acute or subacute;

tubercle 1, large, subequal to inner tepals, or slightly narrower than inner tepals (then free margins of inner tepal distinctly narrower than tubercle), subglabrous to verrucose.

brown or dark reddish brown, 2–3 × 1.5–2 mm.

brown or dark reddish brown, 2–2.5 × 1.7–2.1 mm.

= 40.

= 20.