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.

Distribution

sw United States, Mexico, South America.

Discussion

Varieties 3 (2 in the flora).

Variety cupulata J. A. McDonald is known in Mexico from Chihuahua, Guerrero, Jalisco, and Sinaloa.

Selected References

None.

Lower Taxa

Ipomoea plummerae var. cuneifolia, Ipomoea plummerae var. plummerae

Key

1	Leaf blades ± orbiculate, palmatisect, lobes (3–)5(–7+).	Ipomoea plummerae var. plummerae
1	Leaf blades ± cuneate-obovate, proximally cune­ate, distally ± incised, 3–5(–7+)-toothed.	Ipomoea plummerae var. cuneifolia