Passiflora

Mezzonato-Pires, Ana Carolina, Bernacci, Luís Carlos, Teixeira, Gabriel Henrique Gomes De Souza Freitas, Cruz, Priscila de Freitas, Pacheco, Georgia, Mendonça, Cláudia Barbieri Ferreira & Gonçalves-Esteves, Vania, 2025, Palynological characterization and taxonomical delimitation of the subgenera within Passiflora L. (Passifloraceae: Malpighiales), the largest genus of lianas in the Neotropics, European Journal of Taxonomy 981, pp. 239-264 : 252

Passiflora subgenus Decaloba (DC.) Rchb.

Figs 10–11

Passiflora subgenus Decaloba (DC.) Rchb. ( Reichenbach 1828: 132). — Passiflora section Decaloba DC. (de Candolle 1822: 435).

(244 spp.)

Taxonomic description

Vines slender; monoecious; tendrils present, entire, adhesive disks absent; stipules minute; glands 2, present or absent on the petiole; leaves simple, entire, or 2–3-lobed in most species; ocelli present or absent; main ribs 3; inflorescences 1-flowered, 2-flowered, or cymose; bracts 3, minute, bracteoles absent; hypanthium flat; flowers yellow-green to white or reddish, corona with red or purplish bands; sepals 5; petals 0 or 5; corona with 1 or 2 series of filaments; operculum plicate; nectariferous disk present or absent; limen annular, lobulate, recurved, or cuculiform; trochlea absent, stamens 5; styles 3, stigmas 3; fruit a berry or a fleshy capsule ( Fig. 10 ).

Pollen description

Pollen grains medium to large; isopolar; subprolate, oblate-spheroidal, prolate, or prolate-spheroidal; polar area very small or small; amb circular; 6-colporate, 12-colporate, or 12-colpate; colpi long and narrow or wide; endoapertures 0, 6, or 12, lolongate (in most species), lalongate or circular; opercula 0, 3, 6, or 12, pseudopercula 0, 3, or 6, pontopercula 0 or 3, and/or mesocolpia 3 or 6; sexine semitectate (muri continuous, simplicolumellate; lumina small (0.7–8.7 µm); bacula present or absent). Sexine thicker than nexine, total exine 1.0–5.6 µm ( Fig. 11 ).

Figures

Fig. 10. External morphology of Passiflora subgen. Decaloba (DC.) Rchb. A. Climbing habit of P. vespertilio L. B. Leaf blade of P. auriculata Kunth. C. Abaxial face of the leaf blade with detail of the ocelli of P. vespertilio L. D. Variegated leaf blade of P. capsularis L. E. Detail of the ocelli of P. misera Kunth. F. Flower of P. capsularis L. G. Flower detail of P. vespertilio L. H. Flower of P. porophylla Vell. Photographs were taken by A.C. Mezzonato.

Fig. 11. Pollen grains of Passiflora subgen. Decaloba (DC.) Rchb. A. P. brevipes Killip (J.C. Soto et al. 21520, MEXU). B. P. citrina J.M.MacDougal (R. Evans 1421, MO). C. P. conzattiana Killip (E. Carranza 688, MO). D. P. porophylla Vell. (A.C. Mezzonato et al. 211, R). E–F. P. tenella Killip (E. Aspland 5189, MBM). G. P. candollei Triana & Planch. (I.S. Ribeiro et al. s.n., UPCB 5234). H. P. cervii M.A.M.Azevedo (E.P. Heringer 6578, UB). I–J. P. misera Kunth (A.C. Mezzonato & M. Milward 78, R). K–L. P. quinquangularis S.Calderón ex J.M.MacDougal (A. Sermeño 141, MO). M. P. rubra L. (R. Carter 5174, MO). N–O. P. capsularis L. (A.C. Mezzonato & Y. Tavares 62, R). Polar view (D–E, I, K), equatorial view (A–C, F–H, J, L–O). Abbreviations: en = endoaperture; mes = mesocolpium; op = operculum; ps = pseudoperculum; pt = pontoperculum; arrowheads = apertures. Scale bars = 10 µm.