Ipomoea marcellia Meisner, Fl. Bras.

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 : 448

23. Ipomoea marcellia Meisner, Fl. Bras. 7: 257. 1869. Fig. 5d

Flowering & fruiting: Flowering from May to November; fruiting from June to November.

Distribution: Endemic to the Caatinga, occurring throughout almost the entire Northeast, except in the states of Maranhão and Piauí ( Wood et al., 2020; Simão-Bianchini et al., 2024). In the study area, it is common in the IRs of Campina Grande, Cajazeiras, and Patos , in preserved areas.

Specimens examined: BRAZIL, Monte Horebe, Sítio Braga , 08.07.2010, fl., Fontana 6967 ( HVASF,

digital image!); Nova Palmeira, Sítio Passagem,

27.05.2023, fl., A . P. S . Lima 56 ( HACAM!) ;

Passagem, Fazenda ABA, 16.06.2016, fl., E.M.P.

Fernando 457 (CSTR!).

Notes: This liana has simple, oval leaves with discoloration, the adaxial surface sparsely tomentose, the abaxial surface densely tomentose with prominent veins.It is morphologically similar to I. vespertilia , as both species have sepals that are canescent or cinereous and velutinous, and a cream or greenish corolla. However, I. marcellia differs in that its leaves are persistent during flowering and the stamens are exserted, whereas in I. vespertilia , the leaves are caducous and the stamens are included, reaching the mouth of the tube but never exceeding it.

Figures

Fig. 5. a. Ipomoea incarnata (Vahl) Choisy: Habit. b. I. indica (Burm) Merril, Flower–side view. c. I. longeramosa Choisy, Habit. d. I. marcellia Meisner: Flower, emphasizing the funnelform corolla with extended stamens. e-f. I. nil (L.) Roth: e. Flower, top view; f. Flower, side view. g. I. parasitica (Kunth) G. Don: Habit. h. I. pes-caprae (L.) R.Br.: Flower,top view. i. I. quamoclit L.: Pinatisect leaf and hypocrateriform corolla with exserted stamens.j. I. rosea Choisy:Inflorescence.k & m. I. sericosepala J.R.I.Wood & R.W.Scotland: k. Reproductive branch;m. Fruits.l. I. setosa Ker-Gawl.:Reproductive branch.n. I. vespertilia F.D.Santos,G.C.Delgado-Júnior & Buril:Inflorescence,emphasizing the geniculate corolla (Photos a. J.I.M. Melo; b, g, i, m. F.K.S.Monteiro; c, f, j. A.P.S. Lima; d-e, k. M.G.M. Gonçalves; h. I.C.M. Albuquerque; l, n. F.C. Pinheiro).