Flora of North America species comparison

often several from base, erect to decumbent, branched or unbranched, glandular-hispid and puberulent.

erect, sparsely branched, dark purple-red-glandular-setose, glandular-viscid.

opposite, sessile or subsessile;

petiole 0–1 mm;

blade ovate-lanceolate to oblong or elliptic, 5–15[–20] × 2–7[–10] mm, base cuneate to rounded.

opposite, petiolate proximally, sessile distally;

petiole 1–10[–22] mm;

blade ovate to lanceolate, 10–35[–50] × 3–15[–20] mm, base rounded to cuneate.

leafy.

leafy.

0–3 mm.

(1–)4–6 mm.

alternate, solitary, interpetiolar;

floral tube green abaxially, purple adaxially, 5.5–8(–9) × 2–2.5 mm, sparsely glandular-hispid;

base rounded, 0.5 mm;

inner surface glabrous proximally, villous distal to stamens;

epicalyx segments thick, not terminated by a bristle;

sepals equal;

petals (2–)6, oblanceolate or oblong, unequal, 4 abaxial ones pale purple and 4–4.7 × 2.5–2.8 mm, 2 adaxial ones purple [deep purple or with deep purple midvein] and 4 × 1.5–1.9 mm;

stamens 11, reaching or surpassing sinus of sepals.

alternate, solitary and interpetiolar, (with 2 or 3 axillary);

floral tube pale abaxially, purple-red to purple-black with dark veins adaxially, 5–11 × 1 mm, purple-red-glandular-setose;

base rounded [or a descending spur], to 0.5 mm;

inner surface glabrous proximally, lightly villous to glabrous distal to stamens;

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

sepals unequal, adaxialmost longer;

petals 6, purple or rose [bicolor, with white abaxial petals], obovate to orbiculate, unequal, 4 abaxial 0.5–1[–2.5] × 0.2 mm, 2 adaxial 1–2[–5] × 0.7 mm;

stamens 11, reaching or surpassing sinus of sepals.

8–13(–20), suborbiculate in outline, 1.5–2 × 1.5–1.7 mm, margin rounded.

3–6 [or 7], oblong-elliptic in outline, 2–2.5 × 1.8–2 mm, margin rounded.

= 28, 32 (Bolivia), 34 (Paraguay).

= 20 (Mexico), 44 (Mexico).