Flora of North America species comparison

erect to decumbent and spreading, usually much-branched, hispid and setose, sometimes also puberulent.

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

opposite, subsessile or sessile;

petiole 0–2 mm;

blade broadly elliptic to lanceolate, 12–55 × 5–25 mm, base attenuate.

opposite, sessile to subsessile;

petiole 0–2 mm;

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

leafy.

leafy.

1–2 mm.

1–2 mm.

alternate, 1 interpetiolar, with 1–3 flowers on axillary branchlets;

floral tube purple adaxially and distally, or green throughout, 4–6 × 1–1.5 mm, glabrous except veins sparsely and coarsely setose;

base rounded or a descending spur, 0.5 mm;

inner surface glabrous;

epicalyx segments thick, often terminated by a bristle;

sepals equal;

petals 6, deep purple or rose purple, subspatulate, subequal, 1.5–2.5 × 0.5–1 mm;

stamens 11, extending 2/3 distance to 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.

(4–)6(–9), elliptic to suborbiculate in outline, 1.5–1.7 × 0.2–1.5 mm, margin narrow, flattened, thin.

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

= 16.

= 16 (Brazil).