Ipomoea megapotamica Choisy, Prodr.

A. P. S, Lima, M. T. A., Buril & Melo, J. I. M. de, 2024, Synopsis of Ipomoea (Convolvulaceae) in the state of Paraíba, Brazilian Northeastern, Rheedea 34 (5), pp. 430-456 : 449

25. Ipomoea megapotamica Choisy, Prodr. 9: 375. 1845. Fig. 6g

Flowering & fruiting: Flowering from January to September; fruiting from May to September.

Distribution: Very common in South America ( Wood et al., 2020). In Brazil, it was recorded in the North region (only in Tocantins), throughout the Northeast and Central-West, and in the Southeast, in the states of Minas Gerais and São Paulo, in the Caatinga, Cerrado and Atlantic Forest domains ( Simão-Bianchini et al., 2024). It is frequent Paraíba, with occurrences in the four IRs, mainly in areas of preserved Caatinga, and in transition areas.

Specimens examined: BRAZIL, Arara, 25.05.1959, fl., J. C. Moraes s.n. ( EAN2126 !); Cajazeiras ,

Povoado CaiÇara, 12.04.2012, fl., V . M .

Cotarelli 1675 (HVASF, digital image!); Maturéia,

Pico do Jabre , 22.05.2021, fl. & fr., C. H. S. Oliveira

066 (CSTR!); Monteiro, estrada para a Serra do

Peru, 01.06.2017, fl. & fr., J. I. M. Melo 29-2017b

(HACAM!).

Notes: Herbaceous vines with simple, entire leaves, the leaf blade cordiform or reniform, discolorous, with the adaxial surface sparsely sericeous or glabrous, and the abaxial surface densely sericeous-cinereous. The corolla is campanulate, pubescent, pale pink with a purplish tube, and has included stamens. In the study area, it is the only climbing species with basolateral glands on the sepals.

Figures

Fig. 6. a-d. Ipomoea longibracteolata Sim.-Bianch. & J.R.I. Wood: a. Leaf; b. Leaf indument; c. Flower with closed corolla; d. Bracteole. e-f. I. mauritianaJacq.: e. Leaf; f. Calyx. g. I. megapotamica Choisy,Calyx emphasizing the prominent basolateral glands. h-j. I. meyeri (Spreng.) G.Don: h. Reproductive branch; i. Inner sepal; j. Outer sepal. k-m. I. ramosissima (Poir.) Choisy: k. Reproductive branch; l. Outer sepal; m. Inner sepal. n. I. squamosa Choisy: Calyx. o-p. I. tenera Meisner: o. Reproductive branch; p. Calyx. q. I. tiliacea (Willd.) Choisy: Inflorescence. r. I. grandifolia (Dammer) O’Donell: Calyx. s. I. violacea L.: Reproductive branch (Drawn by F. Martins).