Flora of North America species comparison

ascending or erect, simple or branched, (1–)3–10(–22) cm.

± erect or spreading, usually branched from base, 2–20(–30) cm.

5–10 mm;

stipules overlapping, (2.5–)4–6(–7) mm, divided ca. 1/2 their length, lobes (5–)7–10(–12), on distal nodes oblong, 2–4(–5) times as long as wide;

petiole free from stipules in proximal leaves, adnate in distal ones;

blade 5 mm, prominently divided into 3 segments, each (1–)2–3(–4)-lobed.

6–16 mm;

stipules overlapping, 4–10 mm, divided 1/3–1/2 their length, lobes 8–12, on distal nodes ± triangular, length 1–2(–4) times as long as width;

petiole free from stipules in proximal and distal leaves;

blade 4–10 mm, divided into 3–4 segments, each segment 3–4(–5)-lobed.

opposing leaves, dense, flowers tending to remain hidden.

opposing leaves, dense, flowers not completely hidden.

less than 1 mm.

less than 1 mm.

(0.8–)1.2–1.3(–1.4) × 0.7–0.8 mm, 1–1.5 mm in fruit;

epicalyx bractlets 0–0.1 mm;

hypanthium subglobose to ellipsoid, not contracted at apex, not distinctly 8-ribbed, hairy between ribs 2/3–3/4 of length, sometimes glabrescent;

sepals connivent, 0.2 mm, long-ciliate.

1.3–1.8 × 0.8–1 mm, 1.5–2.5 mm in fruit;

epicalyx bractlets 0–0.1 mm;

hypanthium ovoid to ellipsoid, contracted at apex, 8-ribbed, spreading-erect hairy in proximal 2/3, glabrescent in distal 1/3;

sepals ± spreading to erect, 0.4–0.7 mm, long-ciliate.

(0.9–)1.4–1.6(–1.7) mm.

(1.6–)1.8–2.3(–2.5) mm.

= 16.

= 48.