Ipomoea nitida subsp. krapovickasii

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

24b. Ipomoea nitida subsp. krapovickasii J.R.I. Wood & Scotland, subsp. nov.

urn:lsid:ipni.org:names:

Type.

ARGENTINA. Prov. Corrientes, Depto. Santo Tomé, 16 km N de Santo Tomé, A. Schinini 19971 (holotype CTES, isotypes K, MO).

Diagnosis. Resembling subsp. nitida but leaves 7-18 × 4.5-17 cm, elliptic-rhomboid, base truncate to very broadly cuneate, adaxially usually glabrous, abaxially usually thinly pubescent, sometimes densely so or glabrous. Inflorescence commonly of compounded cymes with up to 8 flowers.

Distribution.

In “hilly” grassland in NE Argentina and adjacent parts of Brazil. ARGENTINA. Corrientes: Ituzaingó, H. Keller et al. 5366 (CTES); Mercedes, T.M. Pedersen 5359 (A, C, K, S); San Martín, Medina et al. 289 (CTES, K); Santo Tomé, T.S. Ibarrola 1597 (LIL, S). Misiones: Capital, H. Keller et al. 12033 (CTES); Apóstoles, C. Cristóbal et al. 1910 (CTES).

BRAZIL. Mato Grosso do Sul: 7 km de Ponta Pora, a Dourados, A. Krapovickas & C. Cristóbal 34289 (CTES). Rio Grande do Sul: 11 km E of Sâo Borja, J.C. Lindemann & A. Pott 21094, (CTES, F); Sâo Borja, P.P.A. Ferreira & J. Durigon 575 (K); ibid., P.P.A. Ferreira 270 (CTES).

Notes.

This subspecies is very variable in indumentum and the number of flowers per cyme but is never sericeous on both surfaces of the leaf and the leaves are characteristically elliptic-rhomboid. It might merit recognition as a distinct species.

Krapovickas et al. 18066 (CTES) from Ituzaingo in Corrientes (Argentina) is near glabrous but the leaves are often 3-lobed so approaching forms of Ipomoea padillae , another indication of introgression in this clade.