Ipomoea rojasii Hassl.

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

53. Ipomoea rojasii Hassl. , Repert. Spec. Nov. Regni Veg. 9: 152. 1911. (Hassler 1911: 152)

Type.

PARAGUAY. Sierra de Amambay, Rojas in Hassler 10752 (lectotype G00175159, designated here; isolectotypes BM, G, K, NY, F, MVM, P, S, UC).

Description.

Erect perennial undershrub to 1 m, stems stout, white-lanate. Leaves subsessile, 4.5-12 × 1.5-2 cm, oblong, apex falcate, acute and strongly apiculate, base attenuate, softly tomentose on both surfaces, veins beneath prominent; pedicels 0-5 mm. Inflorescence terminal, elongate, up to 30 cm long, flowers in sessile or shortly pedunculate few-flowered cymes, (often solitary) in the axils of leaf-like bracts which diminish in size upwards; peduncles 0-0.7 cm; bracteoles 7-11 mm, linear-lanceolate, finely acuminate, deciduous; pedicels 3-10 mm, densely tomentose; sepals slightly unequal, 9-12 × 6-7 mm, ovate, acute, mucronate, densely white-tomentose, inner sepals broader and slightly shorter; corolla 5.5-7.5 cm long, pink, densely pilose in bud and on midpetaline bands, limb c. 4 cm diam., entire. Capsules and seeds not seen.

Distribution.

A cerrado species endemic to the Sierra de Amambay.

PARAGUAY. Amambay: Rojas in Hassler 10891 (F, P, BM); A. Schinini & M. Dematteis 33798 (FCQ, CTES); Cerro Coro, D.R. Brunner 1416 (MO, PY); camino a la Colonia Naranja Hai, N. Soria 7667 (FCQ, MO, G); camino al Cerro Muralla, N. Soria 6377 (FCQ); Cerro Alambique, N. Soria 6400 (FCQ).

Note.

Distinguished by the prominently mucronate, falcate (and bent down) leaf tips, oblong, tomentose laminas, and elongate inflorescence with shortly pedunculate flowers with short pedicels.