Ipomoea indivisa (Vell.) Hallier

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

324. Ipomoea indivisa (Vell.) Hallier f., Meded. Rijks. Herb., Leiden 46: 20. 1922. (Hallier 1922: 20)

Convolvulus indivisus Vell. (Vellozo 1825 [1829]: 71). Type. BRAZIL (lectotype, original parchment plate of Flora Fluminensis in the manuscript section of the Biblioteca Nacional, Rio de Janeiro [cat. no.: mss1198651-050], redesignated here; later published in Vellozo, Fl. Flum. Icon. 2: t. 50. 1827. [pub. 1831], the published plate designated as lectotype by Wood et al. 2015: 115.

Quamoclit indivisa (Vell.) Hallier f., Bot. Jahrb. Syst. 25: 732. 1898. (Hallier 1898d: 732).

Type.

Based on Convolvulus indivisus Vell.

Diagnosis. Very similar to Ipomoea hederifolia and I. rubriflora , differing from both in always having unlobed leaves which may be either entire or dentate. In habit, indumentum, sepal dimensions and rostrate capsule it is similar to Ipomoea rubriflora but in fruit it is easily distinguished by the reflexed fruiting pedicels. Flowering specimens can sometimes be impossible to separate but Ipomoea rubriflora usually has 3-lobed leaves, whereas in I. indivisa the leaves are always unlobed.

Distribution.

Common in southern Brazil and adjacent parts of Argentina and Uruguay but almost absent from the Andean region, being essentially a lowland species. It has possibly been confused with Ipomoea rubriflora in some areas of South America.

URUGUAY. Gibert 231 (K); W.G. Herter 1835 (MO); Berro 1166 (LIL).

ARGENTINA. Buenos Aires: La Plata, Gomez 65 (CTES). Entre Ríos: T.M. Pedersen 8205 (K, S), A. Burkart et al. 25392 (CTES). Misiones: Iguazo, H. Keller et al. 1731 (CTES); San Pedro, Mulgura de Romero et al. 3144 (CTES).

BRAZIL. Dist. Fed.: E.P. Heringer et al. 3781 (K). Espirito Santo: A. Stival-Santos 557 (RB). Minas Gerais: A.F. Regnell I, 301 (S); J.F.Widgren 298 (K, S). Paraná: G. Hatschbach 26338 (MBM, G), 42763 (CTES, MO); Curitiba, P. Dusen 3260 (S), 11441 (S). Rio de Janeiro: O.C. Goés 260 (RB). Rio Grande do Sul: Palacios-Cuezzo 2039 (LIL, S); C.A.M. Lindman 1263 (S); A. Krapovickas et al. 22984 (CTES); M. Ritter 395 (F). Santa Catarina: A. Krapovickas & C. Cristóbal 41976 (ARIZ, CTES); A. Korte 6713 (FURB); L.B. Smith 11896 (NY). São Paulo: C.L. Mosén 1496 (P, S); K. Mizoguchi 1549 (MO).

BOLIVIA. La Paz: Yungas, 1890, M. Bang 587 (F, K, NY, GH, RB); O. Buchtien 5525 (F, GH, MO, S, US); Guaybillas, T. Herzog 162 (S).

Notes.

The Bolivian population of this species is disjunct from the main population in southern Brazil and Uruguay, and grows at a higher altitude (to 1400 m). It has not been recollected for almost a hundred years.

Ipomoea indivisa is very close to I. coccinea and I. cholulensis Kunth , both of which also have unlobed leaves and deflexed fruiting pedicels. It is distinguished from both with difficulty by the crests on its seeds which have longer hairs, different from the short tomentose hairs covering most of the rest the seed. Ipomoea cholulensis differs additionally in the narrower, usually pubescent leaves. Preliminary molecular studies tend to support I. coccinea as a distinct species but do not confirm that I. indivisa is distinct from I. cholulensis .