Ipomoea mcvaughii McPherson

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

268. Ipomoea mcvaughii McPherson , Contrib. Univ. Michigan Herb. 14: 94. 1980. (McPherson 1980: 94)

Type.

MEXICO. Oaxaca, NE of Putla, R. McVaugh 22268 (holotype MICH1111345, isotype ENCB).

Description.

Climbing perennial, stems glabrous. Leaves petiolate, mostly 5-13 × 3-8 cm, ovate, cordate, apex acuminate, glabrous but sometimes ciliate on margins with stiff hairs; petioles 0.5-7 cm. Inflorescence of compact, leafy sessile, axillary cymes, bracts resembling small leaves; bracteoles 1.5-3 × 0.75 cm, ovate; pedicels 3-4 mm, glabrous; sepals unequal, elliptic or obovate, acute or obtuse and mucronate, pubescent on margins, outer 6.5-9 × 2-2.5 mm, inner 11-13 × 5 mm; Corolla 5-7.5 cm, funnel-shaped, pink with whitish basal tube, glabrous, limb 3-4 cm diam. Capsules and seeds unknown.

Illustration.

McPherson (1980: 93); McDonald (1987c: 83).

Distribution.

Endemic to Oaxaca in southern Mexico.

MEXICO. Oaxaca: Pinotepa Nacional, N of Putla de Guerrero, T. Croat 45865 (MO).

Note.

Resembles Ipomoea dumosa by having prominent bracts enclosing the inflorescence but differing in the terminal inflorescence. The position of this species here requires confirmation.