Flora of North America species comparison

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

erect, usually unbranched, sometimes with 1 or 2 long branches from near base, minutely white-strigose and purple glandular-setose, especially viscid on youngest internodes.

opposite, subsessile or sessile;

petiole 0–2 mm;

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

3- or 4-whorled at mid stem, sessile;

blade lanceolate, or linear distally, 10–25 × 1.5–5 mm, base rounded.

leafy.

bracteate, ± terminal.

1–2 mm.

4–25 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.

opposite or 3- or 4-whorled;

floral tube often fading abaxially, red-purple to rose adaxially, 7–9 × 1–2 mm, white-strigose, veins purple glandular-setose;

base rounded or a descending spur, 1 mm;

inner surface glabrous proximally, villous distal to stamens;

epicalyx segments thick, often terminated by a bristle;

sepals equal;

petals 6, pale purple or pink, cuneate-oblong, subequal, 3–4.5 × 0.6–1 mm;

stamens 11, reaching or surpassing sinus of sepals.

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

3, orbiculate in outline, 2.5 × 2.5 mm, margin rounded.

= 16.

= 48.