27. Ipomoea plummerae A. Gray in A. Gray et al., Syn. Fl. N. Amer. ed. 2. 2(1): 434. 1886.
Huachuca Mountain morning glory
vPerennials, root globose, tuberlike. Stems usually ± trailing, sometimes ascending, erect, or twining near tips. Leaf blades of 2 forms; one form ± orbiculate, palmatisect, lobes (3–)5(–7+), linear to spatulate, 3–30(–50) × (0.5–)1–2.5 mm, base ± truncate; the other form ± cuneate-obovate, proximally cuneate, distally ± incised, 3–5(–7+)-toothed; surfaces glabrous. Peduncles glabrous. Flowers: sepals oblong to ovate, outers 5–8 × 2–3 mm, abaxial surface ± muricate or smooth, apex acute to obtuse, mucronate, inners broadly ovate, 7–9(–10) × 3–4 mm, apex acuminate to acute, surfaces glabrous, chartaceous to coriaceous; corolla purple to lavender, funnelform, 25–31 mm, limb 18–22 mm diam.
Varieties 3 (2 in the flora): sw United States, Mexico, South America.
Variety cupulata J. A. McDonald is known in Mexico from Chihuahua, Guerrero, Jalisco, and Sinaloa.
