Ipomoea nivea

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

113. Ipomoea nivea J.R.I. Wood & Scotland, sp. nov

urn:lsid:ipni.org:names:

Type.

PERU. Amazonas: Luya, Camporredondo, Ishangas, 6°07'03"S, 78°20'02"W, 1450 m, 30 March 1997, J. Campos, L. Campos & J. Sembrera 3748 (holotype MO, isotypes K, OXF).

Diagnosis. Resembles Ipomoea praecana in the large ovate, cordate leaves, which are abaxially white-floccose to sericeous and in the short peduncles <12 mm long, but differs in the longer (12 cm, not 6-10 cm), clearly funnel-shaped (not subhypocrateriform), pink (not white) corolla.

Description.

Subshrub to 4 m, reported to be succulent; stem densely white-tomentellous. Leaves petiolate, 6-18 × 5-15.5 cm, ovate, base cordate, apex rounded, mucronate, margin undulate, adaxially green, shortly tomentellous, abaxially white-floccose to sericeous, veins more densely hairy; petiole 6-11 cm, sericeous. Inflorescence of shortly pedunculate axillary cymes; peduncles 10-12 mm, sericeous; bracteoles 18 × 8 mm, spathulate, obtuse, sericeous; pedicels 7-8 mm, sericeous; sepals subequal, sericeous, 22 × 15 mm, elliptic-obovate, obtuse, the inner more rounded; corolla pink, funnel-shaped, c. 12 cm long, the exterior densely pubescent, especially on the midpetaline bands. Capsules and seeds not seen.

Illustration.

Figure 75 .

Distribution.

A very rare species endemic to northern Andean Peru only known from the type collection.

PERU. Amazonas: The type collection.

Note.

Appears to be rather similar vegetatively to Ipomoea praecana , especially in the leaf shape, indumentum and short peduncles, but differs in the longer, clearly funnel-shaped, pink corolla.

Figures

Figure 75. Ipomoea nivea A habit B adaxial leaf surface C abaxial leaf surface outer sepal D outer sepal E inner sepal. Drawn by Rosemary Wise from Campos et al. 3748.