Flora of North America species comparison

usually ascending (but ranging from decumbent to erect), 15–50 cm, glabrous, strigillose, or pilose.

erect, unbranched or branched, 30–85(–150) cm, pilose or glabrous.

opposite;

stipules distinct, filiform or divided into 2–3 subulate-filiform segments, without dark, circular glands at base, 0.6–1.5 mm, pilose;

petioles 0.6–1.3 mm, glabrous, pilose, or strigillose;

blade ovate to narrowly ovate, 4–19 × 2–8 mm, base asymmetric, one side strongly cordate, other side rounded to slightly cordate, margins entire or serrulate (commonly nearly entire with few scattered teeth, often slightly thickened), apex acute, surfaces often with red spot in center, glabrous, pilose, or strigillose; weakly 3-veined from base, usually only midvein conspicuous.

alternate;

stipules 0.1–0.3 mm;

petiole 0.2–3 mm, glabrous or minutely pilose;

blade broadly ovate to elliptic, 32–62(–82) × 18–28(–52) mm, base rounded to cuneate, margins entire, often white on distal leaves, apex acute, rarely mucronate, surfaces glabrous;

venation obscure, only midvein conspicuous.

narrowly obconic to narrowly campanulate, 0.8–1.6 × 0.7–1.3 mm, glabrous or pilose;

glands 4, yellow-green to pink or maroon, circular to oblong, 0.2–0.4 × 0.2–0.5 mm;

appendages white to light pink, oblong to reniform or flabellate, 0.2–1.1 × 0.5–1.7 mm, surfaces glabrous, distal margin entire.

campanulate, 2.2–3.5 × 1.3–2.3 mm, margin between glands deeply divided into fringe of fimbriate lobes, pilose;

glands 4–5, green to greenish yellow, reniform to subcircular, 0.7–1.1 × 1–1.6 mm;

appendages white, orbiculate, 1.5–2.7 × 1.9–2.9(–3.6) mm, entire.

25–40.

30–70.

ovary glabrous or pilose;

styles 0.4–0.6 mm, 2-fid entire length.

ovary pilose;

styles 1–2.5 mm, 2-fid 1/2–2/3 length.

ovoid to oblate, 1.3–1.9 × 1.4–2.1 mm, glabrous or pilose;

columella 1.1–1.7 mm.

oblate, 3–5 × 3.5–7.5 mm, moderately to densely pilose;

columella 3–4.1 mm.

pink to pinkish gray, narrowly ovoid to narrowly ovoid-oblong, 4-angled or weakly 3-angled in cross section, 0.9–1.5 × 0.5–0.7 mm, irregularly dimpled, sometimes also with faint transverse ridges that do not pass through abaxial keel.

orange-tan to gray, ovoid, 3.7–3.9 × 3–3.3 mm, rugose, with 2 transverse ridges (one dark orange to brown, other inconspicuous);

caruncle absent.

in dense, terminal capitate glomerules, with reduced, bractlike leaves subtending cyathia, at tips of main stems and short, leafy, axillary branches;

peduncle 0.1–1.2 mm.

in terminal pleiochasia, dichasial bracts narrowly elliptic to oblanceolate with conspicuous white margins;

peduncle 1.8–2.7(–22) mm, densely pilose.

= 14.

= 56.