Ipomoea macedoi Hoehne

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

375. Ipomoea macedoi Hoehne , Arq. Bot. Estado São Paulo 2: 110. 1950. (Hoehne 1950: 110)

Type.

BRAZIL. Minas Gerais, Cachoeira Dourada do Rio Paranaiba em Ituiutaba, 9 May 1948, A. Macedo 1066 (holotype SP000576, isotypes BM, S, SPF).

Description.

Slender twining or trailing herb, probably annual, stems glabrous. Leaves petiolate, 3(-5)-foliate with distinct truncate(and very briefly cuneate) base, lateral lobes oblong-lanceolate, obtuse with a basal obtuse to acute auricle/lobe, central lobe narrowly oblong-elliptic, obtuse, mucronate, adaxially glabrous, abaxially paler, glabrous to thinly pilose, esp. on veins; petioles 3-5 cm, thinly pilose with multicellular hairs. Flowers solitary (rarely paired); peduncle very short, 0-3 mm, glabrous; bracteoles 5-8 mm, filiform, persistent; pedicels 5-15 mm, thinly pilose; outer sepals 13-20 × 8-10 mm, ovate, acute, base cordate and auriculate, inner similar but smaller, both glabrous to thinly pilose; corolla c. 2.5 cm long, white, glabrous. Capsules subglobose, 9 mm, glabrous, the style somewhat persistent; seeds unknown.

Illustration.

Hoehne (1950: t. 46).

Distribution.

Endemic to the Brazilian planalto found very locally in cerrado.

BRAZIL. Minas Gerais: Municipio Ituiutaba, Fazenda San [Terejuba], A. Macedo 1807 (MO, RB, SP69893).

Note.

Very distinct because of the truncate base to the 3-lobed leaves.