Ipomoea pogonocalyx

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

142. Ipomoea pogonocalyx J.R.I. Wood & Scotland, Kew Bull. 72 (10): 9. 2017. (Wood and Scotland 2017b: 9)

Type.

BRAZIL. Maranhão, Mun. Tuntum, Palmerinha, 74 km de Tuntum, J.U. Santos, E.L. Taylor, G.E. Schotz, N.A. Rosa, C.S. Rosario, T. Rebbeck, J.F. Silva & M.R. Santos 711 (holotype MG, isotypes FTG, K, NY, US).

Description.

Twining perennial herb to 1.5 m, stem and all vegetative parts hirsute with rather stiff, whitish, spreading bulbous-based hairs. Leaves petiolate, 4-13 × 3.5-11 cm, ovate, cordate with rounded auricles, margin entire to slightly undulate, apex abruptly acute, both surfaces hirsute but abaxially paler; petioles 1.7-7.5 cm, hirsute. Inflorescence of axillary pedunculate cymes, usually with 5 flowers; peduncles 2.5-8.5 cm, hirsute, appearing somewhat flexuose; bracteoles 3-4 × 0.5 mm, linear, acuminate, caducous; secondary peduncles 1.3-2.3 cm; pedicels relatively long, 1.6-3.6 cm, slightly more hirsute than peduncles; sepals subequal, 12-15 × 8-9 mm, coriaceous, convex, elliptic-obovate, outer obtuse, abaxially hirsute when young, but hairs somewhat deciduous on the upper part when old, inner sepals rounded, glabrous except for a few hairs near base; corolla 6.5-7 cm long, funnel-shaped, pink, glabrous; limb c. 3.5 cm diam. Capsules and seeds not seen.

Illustration.

Figure 82 .

Distribution.

Rocky ground in seasonally semi-deciduous forest. Endemic to Amazonian Brazil.

BRAZIL. Maranhão: Estreito, G. Pereira-Silva & G.A. Moreira 11328 (CEN).

Note.

Readily recognised by the long, somewhat stiff, spreading bulbous-based hairs that cover all vegetative parts including the outer sepals. The pink flowers and relatively long sepals distinguish it from Ipomoea suaveolens . The rather long pedicels suggest an affinity with I. batatoides and also perhaps with the next species represented by Rosa and Santos 2011.

Figures

Figure 82. Ipomoea pogonocalyx. A habit B abaxial leaf surface C inflorescence with corolla D flower bud E outer sepal, external (left) and internal (right) surfaces F inner sepal, external (left) and internal (right) surfaces. Drawn by Rosemary Wise A, D-F from J. U. Santos et al. 711; B-C from Pereira-Silva & Moreira 11328.