Flora of North America species comparison

erect or ascending, unbranched, sometimes sinuous, 5–30 cm, glabrous or sparsely to densely puberulent.

prostrate, often mat-forming, occasionally with ascending tips, 5–45 cm, densely and evenly pilose to lanate.

petiole 0–1 mm;

blade oblanceolate to obovate, 8–20 mm × 3–7 mm, base truncate or cuneate, margins entire, apex obtuse to rounded, minutely mucronate, surfaces puberulent or glabrous;

venation inconspicuous, only midvein prominent.

opposite;

stipules distinct or connate basally on one side of stem, entire or irregularly toothed or fringed, 0.5–1.2 mm, pilose to lanate;

petiole 0.3–1.5 mm, pilose to lanate;

blade usually oblong to oblong-obovate, occasionally nearly circular, 3–10(–15) × 2–5(–10) mm, base asymmetric, one side usually angled or rounded and other truncate-auriculate, margins minutely or conspicuously serrulate at least toward apex, apex usually broadly rounded to broadly acute, occasionally emarginate, abaxial surface often ± lighter green and without reddish spot, both surfaces sparsely to moderately pilose to lanate; 3-veined from base or venation obscure.

cupulate, 2–2.2 × 1.3–1.8 mm, glabrous;

glands 4, oblong to broadly ovate, usually truncate, 0.5–0.8 × 1–1.6 mm, margins irregularly crenate to strongly dentate;

horns absent or usually divergent or straight, 0.1–0.3 mm, usually slightly longer than, occasionally equaling, teeth on gland margin.

obconic, 0.7–1 × 0.4–0.6 mm, moderately to densely pilose to lanate;

glands 4, reddish, ± unequal, oblong, 0.1 × 0.1–0.3 mm;

appendages white to strongly pinkish or reddish tinged, often unequal, sometimes 1 to all absent, 0–0.3 × 0–0.4 mm, 3-lobed or rudimentarily 1-lobed, distal margin crenate.

10–20.

3–9.

ovary glabrous or puberulent;

styles 0.7–1 mm, 2-fid.

ovary pilose to villous, hairs occasionally slightly appressed;

styles 0.2–0.5 mm, unbranched or inconspicuously notched at tip.

ovoid, 3.5–4 × 4–4.5 mm, 3-lobed;

cocci rounded, smooth to slightly rugose, glabrous;

columella 3.2–3.5 mm.

ovoid, 1.6–2.3 × 1.4–1.5 mm, moderately to densely villous with hairs usually slightly appressed, pubescence often concentrated on proximal 1/2 or along lobes;

columella 1.5–2 mm.

gray to dark gray, truncate-oblong to truncate-ovoid, 2.8–3 × 1.7–2 mm, irregularly pitted;

caruncle conic, 0.6 × 0.7 mm.

light to dark brown, usually mottled, sometimes with thin, white coating, often wearing away irregularly, narrowly oblong-ovoid to ellipsoid, 3–4-angled in cross section, 1–1.5 × 0.5–0.6 mm, with short, irregularly interrupted furrows, appearing partially and irregularly few-ridged.

arrangement: terminal pleiochasial branches 3–5, each 1–4 times 2-branched;

pleiochasial bracts ovate to broadly ovate or oblanceolate, wider than distal leaves;

dichasial bracts distinct, rounded, oblanceolate, or subreniform, base cuneate or obtuse, margins entire, apex obtuse, slightly mucronate;

axillary cymose branches 0–4.

peduncle 0.3–0.9 mm.

solitary at leaf nodes or in small, cymose clusters on congested, axillary branches;

peduncle 0.7–2.5 mm.