Flora of North America species comparison

erect, trailing, or climbing, diffusely branched, to 3+ m, glabrous or pubescent on youngest shoots.

prostrate, climbing, or erect, glabrous.

usually sessile, sometimes short-petiolate;

blade elliptic, oblanceolate, or spatulate, (1–)2.5–9 × 0.5–2.5 cm, base usually long-attenuate, sometimes auriculate, apex acute or obtuse, mucronate.

petiolate (to 1.5 cm) or sessile;

blade ovate, lance-elliptic, or spatulate to oblanceolate, (3–)5–9(–15) × (1–)2.5–4(–7) cm, base attenuate, apex acute, acuminate, or obtuse.

2.5–3(–5) cm, rachises short-pilose (hairs ca. 0.1 mm), eglandular;

floral bracts lanceolate, 3–9 × 1–2 mm.

3–15(–30) cm, rachises glandular, viscid;

floral bracts lanceolate, 3–7 × 1–2 mm.

3-stylous;

calyx 10–13 mm, tube usually short-pilose and with stalked, capitate, glandlike protuberances ca. 1 mm along distal 1/2–3/4 of ribs;

corolla pale blue, 37–53 mm, tube 28–40 mm (more than 2 times length of calyx), lobes 10–16 × 6–15 mm;

stamens included or exserted.

heterostylous;

calyx 7–11(–13) mm, tube glabrous but with stalked glands along length of ribs;

corolla white, 17–33 mm, tube 12.5–28 mm (less than 2 times length of calyx), lobes 5–12 × 3–3.5 mm;

stamens included.

8 mm.

7.5–8 mm.

brown, 7 mm.

reddish brown to dark brown, 5–6 mm.

= 14 + 0–1B.