Ipomoea diegoae

Wood, John R. I., Munoz-Rodriguez, Pablo, Williams, Bethany R. M. & Scotland, Robert W., 2020, A foundation monograph of Ipomoea (Convolvulaceae) in the New World, PhytoKeys 143, pp. 1-823 : 1

332. Ipomoea diegoae M.C. Lara, Acta Bot. Mex. 67: 68. 2004. (Lara 2004: 68)

Type.

MEXICO. Guerrero, Mun. Iguala de la Independencia, M. Castro 40 (holotype FCME, isotypes ENCB, IEB, MEXU).

Description.

Climbing or prostrate annual herb to 1 m, from a fibrous root, stem glabrous. Leaves petiolate, deeply palmatisect into 14-16 segments, segments 10-60 × 0.3-2.8 mm, diminishing in size outwards, linear or ensiform, acute and mucronate, glabrous; petioles 0.3-3.6 cm, often with pseudo-stipules arising from the base. Inflorescence of few-flowered, long pedunculate axillary cymes, sometimes reduced to solitary flowers; peduncles 5-13 cm; bracteoles 1-2 mm, lanceolate, persistent; secondary peduncles (if present) 1-1.5 cm; pedicels 13-20 mm; sepals unequal, broadly lanceolate, mucronulate, green with scarious margins glabrous, outer 8-8.5 × 2 mm, inner 9-14 × 3-4 mm, the scarious margins wide; corolla 4.5-7 cm long, funnel-shaped, pink, glabrous, limb 4-6.5 cm diam. Capsules ovoid, 10 × 6 m, glabrous; seeds 4, 5.5 × 2.5 mm, puberulous.

Distribution.

Endemic to the Valle de Iguala in Guerrero (Mexico) growing in disturbed areas derived from dry forest between 500 and 1000 m.

MEXICO. Guerrero: Iguala, M. Castro 179 (IEB, MEXU).

Note.

Distinguished from similar species by the relatively long leaf segments and sepals (> 8 mm long). The pink corolla is also distinctive and the division of the leaves into 14-16 segments also serves to distinguish this species.