Ipomoea maranyonensis

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

158. Ipomoea maranyonensis J.R.I. Wood & Scotland, Kew Bull. 72: 6. 2017. (Wood and Scotland 2017b: 6)

Type.

PERU. Amazonas, Bagua Province, Imaza District, Com. Yamayakat, R. Vásquez, A. Peña & E. Chávez 23929 (holotype FTG115761, isotypes MO, USM).

Description.

Liana of unknown height, apparently glabrous in all parts; stems glabrous. Leaves petiolate, 5.5-10 × 7-8 cm, 3-5-lobed to near the base, the 4th and 5th lobes often only partially developed, lobes oblong-elliptic or lanceolate, 0.5-2.5 cm wide, acuminate; base truncate, abaxially paler; petioles 4-6 cm. Inflorescence of compounded axillary cymes 20-30 cm long; peduncles 9-12 cm long; 2-6th degree peduncles 1-4 cm; bracteoles 1 mm, oblong, scale-like, caduous; pedicels 7-11 mm; sepals subequal, 5-7 × 3-4 mm, elliptic, coriaceous, convex, outer rounded, minutely mucronate, inner ± scarious, rounded; corolla c. 4 cm long, pink, funnel-shaped, glabrous; limb c. 2.5 cm diam., the midpetaline bands ending in teeth. Capsules 6 × 4 mm, ovoid with a slender persistent style, glabrous; seeds (possibly immature) 3 × 1.5 mm, pilose with long white hairs on the margins.

Illustration.

Figure 92 .

Distribution.

"Transitional Primary Forest" in the Marañon Valley in northern Peru.

PERU. Amazonas: Prov. Bagua, R. Vásquez et al. 18569 (FTG, MO).

Note.

This species has been identified as Ipomoea mauritiana and is clearly related to that very variable species. However, it is immediately distinguished by the compound axillary inflorescences which reach 30 cm in length and are divided up to six times. Additionally, the sepals, corolla and capsules are all much smaller than in I. mauritiana .

Figures

Figure 92. Ipomoea maranyonensis. A habit B outer sepal C inner sepal D corolla opened out to show stamens E ovary and style F calyx and capsule G seed. Drawn by Rosemary Wise A, F, G from R. Vazquez et al. 18569; B-E from R. Vazquez 23929.