Ipomoea scopulina

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

423. Ipomoea scopulina J.R.I. Wood & Scotland, Phytokeys 88: 27. 2017. (Wood et al. 2017d: 27)

Type.

BRAZIL. Espirito Santo, Pancas, Pedra da Colina, 19°13'51"S, 40°52'35"W, 700 m, D.P. Saraiva, J. Silva, K.V. Hmeljeviski & R.C. Forzza 47 (holotype RB 00591205).

Description.

Liana of unknown height; stems woody, pale grey, glabrous. Leaves petiolate, 4-7 × 3-5 cm, ovate, shortly acuminate, base cordate with rounded auricles, margin undulate, adaxially glabrous, abaxially paler, somewhat reticulate, the main veins obscurely puberulent; petioles 1.5-2.5 cm, glabrous or obscurely puberulent upwards. Inflorescence borne on woody branchlets, the axillary cymes subracemose in form, apparently arising after the leaves have fallen; peduncles 6-7 mm long, somewhat woody, glabrous apart from a few scattered hairs; bracteoles deltoid, c. 1 mm long, glabrous, caducous; secondary peduncles 2-7 mm long; pedicels 6-10 mm long, glabrous; sepals slightly unequal, outer 6-7 × 3-3.5 mm, broadly lanceolate, subacute, glabrous, margin scarious, inner similar but obtuse and with broader scarious margins; corolla 3.5-4 cm long, suburceolate, glabrous, reported to be “white”, tube subcylindrical, c. 4 mm wide at base, widened to 10 mm in the middle, constricted upwards, c. 6 mm wide at mouth, lobes broadly ovate, c. 2 × 3.5 mm; ovary presumably glabrous, style c. 2.2 cm, stigma biglobose. Capsules and seeds not seen.

Illustration.

Figure 208 .

Distribution.

Only known from a single granite sugarloaf inselberg in Espirito Santo State in Brazil.

BRAZIL. Espirito Santo: Only known from the type collection.

Note.

Species of Ipomoea with tubular suburceolate corollas are rare in Brazil. The only two comparable Brazilian species are I. longistaminea and I. ana-mariae . Both have oblong-elliptic, coriaceous, somewhat convex sepals very different from the broadly lanceolate subacute sepals of I. scopulina .

Figures

Figure 208. Ipomoea scopulina. A habit B leaf C outer sepal D inner sepal E corolla opened out to show stamens F ovary and style. Drawn by Rosemary Wise from D. P. Saraiva et al. 47.