Flora of North America species comparison

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

erect to ascending, sometimes slightly woody at base, not mat-forming, 15–60 cm, usually glabrous, young branches rarely very sparsely short pubescent.

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.

opposite;

stipules usually distinct, occasionally connate basally, triangular, entire or 2–4 parted, apically ciliate, 0.3–0.4 mm, usually glabrous, rarely very sparsely short pubescent;

petiole 0.5–1.5 mm, usually glabrous, rarely very sparsely short pubescent;

blade ovate, oval, elliptic, oblong-elliptic, or linear-elliptic, 4–12 × 1–7 mm, base asymmetric, rounded or subcordate, margins usually entire, rarely sparsely serrate, apex obtuse to acute, sometimes mucronate, surfaces abaxially often purple or red, adaxially green, usually glabrous, rarely very sparsely short pubescent; 3-veined from base, only midvein conspicuous.

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.

turbinate to campanulate, 0.7–1 × 0.8–1 mm, usually glabrous, rarely very sparsely short pubescent;

glands 4, brown, slightly concave, elliptic-oblong, 0.1–0.2 × 0.3–0.6 mm;

appendages white or pink to dark red, usually oblong or flabellate, occasionally rudimentary and forming narrow rim at edge of gland, (0–)0.1–0.2 × 0.4–1 mm, distal margin entire or crenulate.

30–70.

8–14.

ovary pilose;

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

ovary glabrous, subtended by triangular calyxlike structure;

styles 0.4–0.6 mm, 2-fid 1/2 length.

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

columella 3–4.1 mm.

broadly ovoid, 1–1.5 × 1.7–2.1 mm, glabrous;

columella 1–1.4 mm.

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.

reddish brown, ovoid, 4-angled in cross section, 0.7–1 × 0.6–0.7 mm, smooth or obscurely wrinkled.

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

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

solitary at distal nodes;

peduncle 0.5–1.1 mm.

= 56.