Ipomoea longirostra

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

370. Ipomoea longirostra J.R.I. Wood & Scotland, Phytokeys 88: 23. 2017. (Wood et al. 2017d: 23)

Type.

BRAZIL. Minas Gerais, Lima Duarte, P.N. Estadual do Ibitipoca, prov. Rio do Salto, 21°42'80"S, [43°47'W] (longitude missing from label), 1200 m, 9 March 2003, fl., fr., R.C. Forzza, L.C.S. Assis. J.G. Jardim, R. Lima, L. Menini Neto, E. Lucas, B.R. Silva, S. Edwards & D. Zappi 3031 (holotype RB; isotypes K, NY).

Description.

Twining perennial of unknown height, glabrous in all vegetative parts. Leaves petiolate, 3-4 × 1.3-2.2 cm, deltoid, finely acuminate, shortly mucronate, base truncate to cordate with rounded auricles, margin denticulate, abaxially paler with prominent veins; petioles very slender, curved, 9-17 mm. Inflorescence of solitary pedunculate, axillary flowers; peduncles 10-15 mm; bracteoles caducous, not seen; pedicels noticeably stouter than peduncles 12-15 mm; sepals subequal, elliptic, glabrous, margins scarious, outer 8-11 × 4-6 mm, obtuse, inner 9-12 × 6-7 mm, rounded, usually c. 0.5 mm longer and 1 mm wider than outer sepals; corolla c. 5.5 cm long, pink, glabrous, funnel-shaped, limb 3-3.5 cm diam. Capsules 13 × 6-7 mm, conical, glabrous, strongly rostrate, the apex 4-5 mm long, persistent.

Illustration.

Figure 179 .

Distribution.

Endemic to the area of the type locality in the P.N. Estadual do Ibitipoca in Minas Gerais.

BRAZIL. Minas Gerais: P.N. Estadual do Ibitipoca, prov. Rio do Salto, R.C. Forzza et al. 4362 (NY, RB).

Notes.

Almost certainly related to Ipomoea procumbens , I. longirostra is distinguished by its ovate-deltoid, basally truncate leaves which are borne on slender pedicels. The subequal sepals are ovate-elliptic with distinct scarious margins, rather different from the lanceolate to ovate, usually acute to acuminate sepals of I. procumbens . The strongly rostrate capsule of the new species is also striking.

C.R. Sperling et al. 6050 (FTG, K, MG, NY) from Serra dos Carajás in Pará State may belong here but the inflorescence is branched and no fruit was seen.

Figures

Figure 179. Ipomoea longirostra. A Habit showing inflorescence B habit showing rostrate capsule C abaxial leaf surface D leaf apex E outer sepal F inner sepal. Drawn by Rosemary Wise from Forzza et al. 303.