Flora of North America species comparison

decumbent or slightly ascending, branched, often densely clumped, previous year's dead stems not persistent, 17–27 cm, usually glabrous, rarely sparsely villous.

prostrate, often mat-forming, 8–35 cm, usually villous along margins, lower surface glabrous, upper surface usually strigillose to puberulent, rarely glabrous or glabrate.

alternate;

stipules 0.1–0.2 mm;

petiole (0–)1–2 mm, glabrous;

blade usually linear, obovate, or oblanceolate to orbiculate, rarely filiform, proximal greatly reduced, scalelike, 15–70 × 1.5–13 mm gradually smaller proximally, base cuneate, margins entire, apex rounded, broadly acute, or emarginate, surfaces glabrous;

venation occasionally obscure on smaller leaves, midvein conspicuous.

opposite;

stipules usually distinct or connate basally, rarely completely connate, deltate, laciniate, glabrous or pilose (lower side), forming narrow deltate scale, sometimes apically 2-fid or laciniate, glabrous (upper side), 0.4–1.9 mm;

petiole 0.3–1.2 mm, glabrous, pilose or villous;

blade oblong to obovate, 4–12 × 2–7 mm, base asymmetric, one side attenuate, cuneate or rounded, other rounded or cordate, margins serrulate at least distally, apex obtuse, surfaces glabrous or sparsely sericeous, pilose or villous; 3-veined at base.

yellow or yellow-green, hemispheric, 1–1.2 × 2–2.4 mm, glabrous;

glands 5, yellow or yellow-green, obovate or elliptic, 0.7–0.8 × 1–1.2 mm;

appendages white or green, often forming narrow rim around distal margin of gland, 0–0.2 mm, entire.

campanulate or obconic, 0.8–1 × 0.7–0.8 mm, usually glabrous, rarely sparsely pilose toward apex;

glands 4, pink, reniform, oblong or elliptic, 0.1 × 0.2–0.3 mm;

appendages absent or white to pink, oblong, flabellate or forming narrow rim around edge of gland, 0.1–0.3 × 0.3–0.6 mm, distal margin usually entire, sometimes lobed.

10–20.

6–15.

ovary glabrous;

styles 0.4–0.8 mm, 2-fid at apex.

ovary usually pilose or villous with hairs concentrated along keels, rarely glabrous;

styles 0.2–0.3 mm, 2-fid 1/2 length.

globose, 2.3–3.4 × 3.5–4.2 mm, glabrous;

columella 3–3.1 mm.

ovoid, 1.2–1.6 × 1.2–1.4 mm, usually pilose or villous with hairs concentrated along keels, often glabrous in between, very rarely completely glabrous;

columella 1–1.4 mm.

white or brown, ovoid, 2.3–2.5 × 1.5 mm, angular, with 5 longitudinal ridges, shallowly and irregularly pitted;

caruncle absent.

reddish brown to orange or gray-pink, narrowly ovoid, 4-angled in cross section, 0.9–1.2 × 0.5–0.6 mm, almost smooth or with 5–7 faint transverse ridges that do not pass through abaxial keel.

usually in terminal dichasia, sometimes pleiochasia;

peduncle 10–50(–70) mm, glabrous.

solitary at nodes or on short, congested axillary branches;

peduncle 0.9–2.5 mm.