Ipomoea aequiloba

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

358. Ipomoea aequiloba J.R.I. Wood & Scotland, Kew Bull. 72 (9): 22. 2017. (Wood and Scotland 2017b: 22)

Type.

BRAZIL. Tocantins, Mun. Tocantinopolis, km 18 estrada vecinal á Ferrovia Norte Sul, 6°38'50"N, 47°29'56"W, 190 m, 21 Feb. 2005, G. Pereira-Silva et al. 9483 (holotype CEN).

Description.

Slender trailing perennial; glabrous in all parts. Leaves shortly petiolate, 0.8-2.5 × 0.1-0.4 cm, sagittate, appearing subequally trilobed, the central lobe linear to very narrowly oblong, acute, the two linear acute auricles, resembling, ± equalling or slightly shorter than the central lobe, both surfaces glabrous; petioles 0.6-3 cm. Inflorescence of solitary axillary pedunculate flowers; peduncles 15-20 mm, commonly bent at a sharp angle at apex; bracteoles scale-like c. 1 mm long; pedicels 6-13 mm, slightly thickened upwards; sepals unequal, lanceolate, finely acuminate, glabrous, outer pair unequal 4.5-8 × 2-2.5 mm; inner 13-14 × 3 mm; corolla 6.5 cm long, funnel-shaped, pink, glabrous; limb c. 4.5 cm diam., the midpetaline bands ending in a tiny tooth. Capsules and seeds not seen.

Illustration.

Figure 172 .

Distribution.

Scattered in the Cerrado biome of Brazil, eastern Paraguay and NE Argentina.

ARGENTINA. Misiones: Dept. Candelaria, Colonia Tacuaruzu, H. Keller et al. 13355 (CTES, OXF).

PARAGUAY. Concepción: N of Arroyo Tagatiya-Guazu, E. Zardini & T. Tilleria 38683 (MO).

BRAZIL. Bahia: 10 km N. de Barreiras, G. Hatschbach 42084 (CTES, FTG). Goiás: São Domingos, A.A. Santos 2197 (CEN). Maranhão: Mun. Estreito, G. Pereira-Silva & G.A. Moreira 12442 (CEN). Mato Grosso do Sul: 68 km W of Jardim, A. Krapovickas & A. Schinini 32751 (CTES). Minas Gerais: Ituiutaba, A. Macedo 86 (K, US), 4141 (BM). Tocantins: Trans-Amazonian highway, T. Plowman et al. 9277 (MO, MG, NY, RB); Palmeiras do Tocantins, G. Pereira-Silva & G.A. Moreira 12546 (CEN).

Note.

Clearly related to to both Ipomoea maurandioides and I. mucronatoproducta and distinguished from I. maurandioides by the sepals lanceolate and finely acuminate, rather than the inner sepals oblong-oblanceolate and mucronate and from I. mucronatoproducta by the midpetaline bands terminating in a small tooth rather than in a long fine point up to 6 mm in length. It is easily distinguished from both by the distinctive, superficially 3-lobed leaves in which the two auricles are more or less equal to the blade.

Figures

Figure 172. Ipomoea aequiloba. A habit B outer sepal C middle sepal D inner sepal E corolla opened out F ovary and style G capsule E seed. Drawn by Rosemary Wise A from Macedo 86, B-H from Hatschbach 42084.