Ipomoea brasiliana (Mart. ex Choisy) Meisner var. subincana (Choisy) J.R.I. Wood

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 : 441-442

10. Ipomoea brasiliana (Mart. ex Choisy) Meisner var. subincana (Choisy) J.R.I. Wood & Scotland, PhytoKeys 143: 254. 2020 . Fig. 3g

Flowering & fruiting: Flowering from February to September; fruiting not seen.

Specimens examined: BRAZIL, Araruna, Pedra da Boca , 14.04.2002, fl ., M.R. Barbosa et al. 2408 ( JPB!); Maturéia, Pico do Jabre , 23.02.2023, fl ., A.P.S. Lima 46 ( HACAM); Serra Branca, arredores da Serra do Jatobá , 03.05.2022, fl ., A.P.S. Lima 28 (HACAM!, PEUFR!).

Distribution: Although they are still treated as distinct species in the Flora and Funga of Brazil ( Simão-Bianchini et al. 2024), I. subincana was reduced to a variety of I. brasiliana by Wood et al. (2020). They are both endemic to Brazil in all states of the Northeast, in the Central-West only in the Distrito Federal, and in the Southeast only in Minas Gerais, in open areas of the Caatinga and Cerrado (Simão-Bianchini et al., l.c.). Recently, I. subincana was also reported in an area of Atlantic Forest by Marinho et al. (2023). In the study area, the typical variety is frequently found across all four IRs, whereas var. subincana is occasional and has no records in the Cajazeiras IR. Both varieties were observed in areas of Caatinga, often associated with well-preserved habitats, frequently near rocky outcrops.”

Notes: Vines of var. subincana are characterized by a tomentose indumentum on the branches, peduncles, and leaves, especially on the abaxial surface, which features prominent veins. The adaxial surface varies from sparsely pubescent to tomentose. The sepals are oblong to oval with a rounded to obtuse apex, and the corolla is infundibuliform, entirely purplish or pinkish with a purplish tube, and has included stamens. The varieties can be differentiated by their indumentum: glabrescent on the pedicels, sepals, and corolla in var. brasiliana , and pubescent to tomentose in var. subincana .

Figures

Fig. 3. a. Ipomoea acanthocarpa (Choisy) Hochst. ex Schweinf. & Asch., Inflorescence–side view. b. I. alba L., Inflorescence–side view. c. I. asarifolia (Desr.) Roem. & Schult., Habit. d. I. bahiensis Willd. ex Roemer & Schultes, Inflorescence–lateral view emphasizing the calyx with subapical rostrum.e. I. batatas (L.) Lamarck,Flower–side view.f. I. blanchetti Choisy, Habit emphasizing the three-lobed leaf.g. I. brasiliana (Mart. ex Choisy) Meisner var.subincana (Choisy) J.R.I. Wood & Scotland, reproductive branch. h. I. carnea Jacq. subsp. fistulosa (Mart. ex Choisy) D.F. Austin, Habit. i. I. decipiens Dammer, Inflorescence. j–k. I. imperati (Vahl) Grisebach: j. Habit; k. Flower– top view (Photos a. B.F. Rocha; b-c, e. A.P.S. Lima; d. C.C. Correia;f. M.G.M. Gonçalves; g. E.M. Rodrigues; h. K.A. GorgÔnio;i-k. I.C.M. Albuquerque).