Flora of North America species comparison

erect to decumbent, often reddish, much-branched, purple-red glandular-setose, glandular-viscid.

erect to semi-decumbent, sparsely branched, puberulent and often sparsely red-purple glandular-setose.

opposite, sessile to subsessile;

petiole 0–2 mm;

blade elliptic, 15–45 × 7–25 mm, base attenuate.

leafy.

leafy.

1–5 mm.

1–2 mm.

alternate, solitary, interpetiolar, sometimes with 1 axillary;

floral tube pale abaxially, deep purple-red adaxially, 8–12 × 1–2 mm, purple-red glandular-setose;

base rounded or a descending spur, 0.5–1 mm;

inner surface glabrous proximally, densely villous distal to stamens;

epicalyx segments thick, 2 flanking the adaxialmost sepal terminated by a bristle;

sepals unequal, adaxialmost longer;

petals 6, purple, oblanceolate, unequal, 4 abaxial petals 2–5 × 0.4–0.6 mm, 2 upper petals 3–6 × 1.5–2.5 mm;

stamens (5–)11, reaching or surpassing sinus of sepals.

alternate, solitary, interpetiolar;

floral tube green abaxially, purple or green adaxially, 6.5–7.5 × 1 mm, puberulent and sparsely glandular-setose;

base a descending spur, 0.5 mm;

inner surface glabrous proximally, glabrous or finely puberulent distal to stamens;

epicalyx segments thick, often terminated by a bristle;

sepals equal;

petals 6, pale rose or pink, oblong, subequal, 2.5–5 × 1.5–2 mm;

stamens 11, scarcely reaching sinus of sepals.

7–10, oblong-elliptic in outline, 2.3–2.8 × 1.8–2.3 mm, margin rounded.

6–13, suborbiculate to oblong in outline, 1.5–1.8 × 1.3–1.5 mm, margin narrow, flattened, thin.

, petiolate;

petiole (2–)5–15(–20) mm;

blade narrowly lanceolate to narrowly ovate, 20–50 × 6–20 mm, base attenuate.

= 12.

= 16 (Brazil).