Flora of North America species comparison

erect, unbranched or branched, 5–45 cm, usually glabrous or sparsely pilose.

erect to ascending, 5–25 cm, glabrous.

petiole absent or to 0.5 mm;

blade obovate-spatulate, 4–40 × 2–25 mm, base cuneate, attenuate, or auriculate, margins serrulate, apex rounded, surfaces glabrous;

venation pinnate, midvein prominent.

opposite;

stipules distinct, subulate-filiform, entire, 0.3–0.5 mm, glabrous;

petiole 0.4–0.9 mm, glabrous;

blade narrowly oblong to linear, often slightly falcate, 2–15 × 0.3–0.8 mm, base symmetric to subsymmetric, rounded to attenuate, margins entire, thickened and often revolute, apex acute to obtuse, surfaces glabrous;

only midvein conspicuous.

cupulate, 1.5–2 × 0.7–1.1 mm, glabrous;

glands 4, elliptic, 0.2–0.5 × 0.5–1 mm;

horns absent.

turbinate, 0.4–0.5 × 0.4–0.6 mm, glabrous;

glands 4, yellow to pink, oblong to slightly reniform, (0–)0.1–1 × 0.1–0.2 mm;

appendages white to pink, ovate to oblong, 0.2–0.4 × 0.1–0.3 mm, distal margin usually entire, rarely emarginate.

10–15.

5–12.

ovary glabrous;

styles 0.7–1 mm, 2-fid.

ovary glabrous;

styles 0.1–0.2 mm, 2-fid 1/2 length.

depressed-globose, 2.5–4 × 3.2–4.2 mm, clearly 3-lobed;

cocci rounded, smooth, glabrous;

columella 0.9–1.1 mm.

broadly ovoid, 1.1–1.4 mm diam., glabrous;

columella 0.8–1.1 mm.

dark brown to blackish, subovoid, 1.6–2.2 × 1.5–1.9 mm, reticulate;

caruncle elliptic, 0.9–1.1 × 0.4–0.5 mm.

orange to tan or reddish brown, narrowly ovoid, 4-angled in cross section, 0.9–1.1 × 0.5–0.6 mm, smooth.

arrangement: terminal pleiochasial branches (3–)5, each 1–2 times 2-branched;

pleiochasial bracts obovate, wider than distal leaves;

dichasial bracts distinct, obovate or rhombic, ± oblique, base rounded, truncate, or attenuate, margins serrulate, apex rounded;

axillary cymose branches 0.

peduncle 0.2–1 mm.

solitary at distal nodes;

peduncle 0.1–0.9 mm.