Ipomoea aristolochiifolia G.Don, Gen. Hist.

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 : 439

3. Ipomoea aristolochiifolia G.Don, Gen. Hist. 4: 277. 1838. Fig. 4c–e

Flowering & fruiting: Flowering and fruiting from July to October.

Distribution: It is distributed throughout the Americas, though it usually not abundant ( Wood et al., 2020). In Brazil, it occurs across all regions, albeit in only a few states, found in the Amazon, Cerrado, Atlantic Forest ( Simão-Bianchini et al., 2024), and Caatinga domains ( Santos et al., 2020a). In the state of Paraíba, it is rare, occurring solely in the Intermediate Region (IR) of Campina Grande. Previously , it was known only from the municipality of Areia (Atlantic Forest vegetation), based on collections made between 1944 and 1958, and could have been considered extinct in the state. However, recent material collected in 2020 from the HCES herbarium was found in an area of Caatinga in the municipality of Cuité, confirming its continued presence in the region.

Specimens examined: BRAZIL, Areia, Escola de agronomia do Nordeste , 10.09.1944, fl. & fr .,

J.C. Moraes 106 (EAN!); Cuité, Sítio Maribondo,

10.07.2020, fl. & fr., V . F . Sousa 1198 (HCES!).

Notes: Ipomoea aristolochiifolia is a climbing herb that stands out in the study area due to its unique peduncle, which arises through the sinus at the base of the leaf—distinct from other species in the area, where peduncles arise opposite the leaf. This species has simple, entire leaves, with a small (1.5–3 × 1–3 cm) oval leaf blade. The sepals are subequal, with the outer ones slightly smaller (about 0.1 cm long) than the inner ones. The sepals feature warty longitudinal ridges in the median region and prominent scarious margins, which are whitish or cinereous in dried material. The small corolla (1.8–2 cm long) is funnelform, with a bluish or lilac limb and a whitish or yellowish tube. The stamens are included within the corolla.

Figures

Fig. 4. a-b. Ipomoea acanthocarpa (Choisy) Hochst. ex Schweinf. & Asch.: a. Calyx; b. Fruit. c-e. I. aristolochiifolia G.Don; c. Reproductive branch,emphasizing the peduncle arising through the sinus at the base of the leaf; d. Calyx; e. Fruit. f-g. I. batatas (L.) Lamarck: f. Sepals;g. Fruit. h. I. batatoides Choisy: Reproductive branch. i: I. blanchetti Choisy: Reproductive branch. j-k. I. calyptrata Dammer: j. Reproductive branch; k. Calyx with persistent bracteoles. l. I. decipiens Dammer: Open calyx–posterior view. m-p. I. eremnobrocha D.F. Austin,: m. Reproductive branch; n. Sericeous indument and glands on the adaxial surface of the leaf; o. Flower, emphasizing the campanulate corolla; p. Fruit. q. I. hederifolia L., Inflorescence.r. I. heptaphylla Sweet, Reproductive branch.s. I. incarnata (Vahl) Choisy,Calyx and bracteoles (Drawn by F.Martins).