Ipomoea sororia D.F. Austin & J.L. Tapia

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

333. Ipomoea sororia D.F. Austin & J.L. Tapia , Sida 19: 807. 2001. (Austin and Tapia-M 2001: 807)

Type.

MEXICO. Yucatán, J.L. Tapia-M & Carnevali 1120 (holotype CICY047694, isotypes: F, FTG K, MEXU, MO, NY, UCAM, XAL).

Description.

Twining annual herb to 2 m, stems glabrous. Leaves petiolate, 2.5-5 × 3-7 cm, pedately 5-7-lobed, lobes entire or basal lobes 1-3 lobed, lobes oblong-lanceolate, acute, glabrous; petioles 2-3 cm. Inflorescence in 1-2-flowered axillary cymes; peduncles 5-3.5 cm; bracteoles 1-2 mm, lanceolate; pedicels 4-5 mm; sepals slightly unequal, outer 5-8 mm, ovate, cordate, with a reflexed lanceolate terminal mucro, abaxially with 3 prominent papillae (soft spines), inner 6-8 mm, ovate, with a 3-4 mm mucro, the margins scarious but abaxial papillae absent; corolla 2-2.5 cm long, white with a lavender throat, funnel-shaped, glabrous, stamens included. Capsules 5 × 4 mm, ovoid, glabrous; seeds unknown.

Illustration.

Austin and Tapia-M (2001: 808).

Distribution.

Endemic to dry forest bordering mangrove swamp near sea level in southern Mexico.

MEXICO. Campeche: 2 km NE of Chiná, C. Gutiérrez 6056 (UCAM); Punta Arenas, Tankuche, F. & H. Cabrera 15304 (MEXU). Yucatán: Hunucmá, A. Espejo et al. 1281 (MO).

Note.

Similar to Ipomoea costellata and I. ternifolia but with distinct papillose outer sepals, and also occupying a distinct habitat.