Ipomoea sp. C (Rosa & Santos 2011)

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

143. Ipomoea sp. C (Rosa & Santos 2011)

Description.

Twining perennial of unknown height; stems pilose. Leaves petiolate, 6-13 × 3-7.5 cm, oblong-ovate, base cuneate, margin entire to slightly undulate, apex acuminate and strongly mucronate, adaxially green, pilose with bulbous-based hairs, abaxially grey-tomentose with dense, soft appressed hairs; petioles 2-3.5 cm, pilose. Inflorescence of axillary, pedunculate, often compounded cymes; peduncles 4-7 cm, thinly pilose; bracteoles caducous, not seen; secondary peduncles 1.6-2.8 cm; tertiary peduncles 0.6-1,1 cm; pedicels 0.9-2.5 cm, thinly pilose; sepals subequal, coriaceous, convex, 7-9 × 3-4 mm, outer obtuse to subacute, glabrous but pilose near base, inner glabrous, margins scarious; corolla not seen. Capsules 6-7 × 5 mm subglobose, rostrate with persistent style 3-4 mm, glabrous; seeds 4 × 2.5 mm, blackish, glabrous apart from long marginal hairs c. 6 mm in length.

Distribution.

Endemic to Mato Grosso.

BRAZIL. Mato Grosso: Rio Juruena, cachceira Santa Iria ponto (SC. 21VB), 25 May 1977, Rosa & Santos 2011 (F, FTG, MG, NY).

Note.

Distinguished from Ipomoea batatoides and related species by the distinctive oblong leaves with the softly appressed pilose indumentum on the abaxial surface. We have not described this species formally as no flowering material is available.

• Species 144-171 form the core of this clade, all with glabrous corollas and sepals, only the first and last somewhat uncertain in their placement.