Flora of North America species comparison

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

repent, decumbent, or ascending to erect, leafy or leafless, (1.2–)2–30 cm (often as short as 2 cm in C. wrightii), glabrous or sparsely to densely villous.

usually opposite, sometimes alternate distally, membranous.

cauline or arising from stolons or rhizomes, opposite or alternate;

stipules absent;

petiole present, glabrous or villous;

blade ovate, depressed-ovate, depressed-elliptic, reniform, flabellate, or, sometimes, nearly orbiculate, unlobed, base attenuate, cuneate, truncate, or cordate, ultimate margins subentire, crenate, crenulate, or crenate-dentate, crenae sometimes prominent and margins appearing ± lobed, apex obtuse, rounded, or truncate, surfaces glabrous or sparsely villous to villous;

venation palmate.

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.

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.

simple or compound cymes, from terminal bud in rosette, 2–30-flowered, sometimes flowers solitary, bracteate.

absent or 0.1–1.8(–3) 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 1/2–3/4 adnate medially or distally to ovary, 0.5–1.5 mm free from ovary, greenish or yellow-green;

sepals 4, yellow, greenish yellow, green, greenish red, reddish orange, or purple, sometimes purple-spotted;

petals absent;

nectary disc conspicuous or apparently absent;

stamens 2–8, usually 4 or 8;

filaments lanceolate to narrowly oblong;

ovary 1/2–3/4-inferior, 1-locular, carpels connate 3/4–4/5 their lengths;

placentation parietal;

styles 2;

stigmas 2.

(cuplike after dehiscence), 2-beaked (beaks divergent).

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

dark brown or reddish brown, ellipsoid, ovoid, or spheroid, smooth.

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.

= 11.

= 18.