Flora of North America species comparison

ascending to erect, branching in distal 1/4–1/2, 8–27 cm, glabrous.

repent, decumbent, or ascending, branching in distal 1/4–1/2, 4–30 cm, glabrous.

usually opposite, sometimes alternate distally, membranous.

opposite, sometimes alternate distally, membranous.

2–9;

petiole 0.2–10 mm, glabrous;

blade ovate to depressed-ovate or flabellate, 5–17(–20) × (3–)6–16 mm, base truncate to cuneate, margins 9–17(–21)-crenate or -crenate-dentate, glabrous, surfaces glabrous abaxially and adaxially.

4–9;

petiole absent or 0.1–4 mm, glabrous;

blade ovate to depressed-ovate, round, or flabellate, 2.5–15 × 2–10(–20) mm, base attenuate to cordate, margins 5–7(–9)-crenate or -crenulate, glabrous, surfaces glabrous abaxially and adaxially.

terminal or axillary solitary flowers or 3–20-flowered, open cymes;

bracts green, not purple-spotted, foliaceous, ovate to flabellate, 2–9 × 2–8 mm, margins 5–9-crenate.

terminal or axillary solitary flowers or 2–10-flowered, open cymes;

bracts green, not purple-spotted, foliaceous, ovate to flabellate, 2–7 × 2–7 mm, margins subentire or 5–7-crenate or -crenulate.

absent or 0.1–1.8(–3) mm.

absent or 0.1–0.8 mm.

hypanthium green, not purple-spotted, turbinate, 0.8–1.8 × 1.5–3 mm, glabrous;

sepals spreading to erect, green, not purple-spotted, sometimes reddish brown-spotted distally, broadly ovate, 1–1.5 × 1.1–1.8 mm, apex obtuse to rounded;

nectary disc conspicuous, green or purple, 8-lobed;

stamens 8, 0.4–0.8 mm;

anthers yellow, 0.1–0.3 × 0.2–0.4 mm;

styles 0.3–0.4 mm.

hypanthium green, not purple-spotted, turbinate, 0.9–1.8 × 1.4–2.6 mm, glabrous;

sepals spreading to erect, green, greenish yellow, or greenish red, not purple-spotted or purplish brown-spotted distally, broadly triangular or broadly ovate to nearly round, 1.3–1.8 × 0.9–1.6 mm, apex obtuse to rounded;

nectary disc conspicuous, green or purple, 8-lobed;

stamens 4–8, 0.5–0.9 mm;

anthers purple, red, or orange, 0.2–0.3 × 0.4–0.5 mm;

styles 0.2–0.6 mm.

10–20, dark brown, ovoid to ellipsoid, 0.7–1 mm, glabrous.

6–16, dark brown, spheroid to ovoid, (0.5–)0.6–0.8 mm, puberulent.

leaves: petiole 3–10 mm, glabrous;

blade ovate to depressed-ovate or flabellate, 5–17(–20) × (3–)6–16 mm, base truncate to cuneate, margins 9–17(–21)-crenate or -crenate-dentate, not purple-spotted, glabrous, surfaces glabrous abaxially and adaxially.

leaves: petiole 1–4 mm, glabrous;

blade ovate to depressed-ovate, round, or flabellate, 2.5–15 × 2–10(–20) mm, base attenuate to cordate, margins subentire or 5–7(–9)-crenate or -crenulate, not purple-spotted, glabrous, surfaces glabrous abaxially and adaxially.

= 18.

= 18, 24.