Epiphyllum Haworth

Ruiz-Dominguez, Catalina, Vovides, Andrew P. & Sosa, Victoria, 2019, Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae), PhytoKeys 128, pp. 121-140 : 126

Epiphyllum Haworth

Pollen.

trizonocolpate, radially symmetrical, isopolar with circular contour in polar view. Shape: varies from oblate-spheroidal to prolate-spheroidal (P/E=0.90-1.06). Apertures: 3, colpate, large; polar area of medium size (PAI=0.32-0.46). Measurements: pollen grains large, (69.33)88.76(111.93) × (74.43)86.49(105.34) μm in equatorial view; exine thickness (2.24)2.73(3.67) μm. Ornamentation: smooth surface with tectum perforate, ornated with spinules of (1.22)1.69(2.02) μm length × (0.97)1.26(1.57) μm diameter in base; perforations (0.32)0.51(0.65) μm in diameter ( Figure 3C ).

Species examined.

Epiphyllum oxypetalum (DC.) Haw. (Guatemala, Sacatepéquez. C. Ruiz et al. 640 BIGU); Epiphyllum thomasianum (K. Schum.) Britton & Rose (Guatemala, Sacatepéquez. C.K. Horich 572922 MEXU).

Figures

Figure 3. Pollen grains of tribe Hylocereeae (Scanning Electron Microscope photographs). Left polar view, right equatorial view A Acanthocereus tetragonus (C. Ruiz et al. 576) B Disocactus ackermanii (R. Torres et al. 309) C Epiphyllum oxypetalum (C. Ruiz et al. 640) D Selenicereus costaricensis (C. Ruiz et al. 555) E S. escuintlensis (C. Ruiz et al. 635) F S. guatemalensis (M. Veliz et al. 20227) G S. minutiflorus (C. Ruiz et al. 627) H S. ocamponis (M. Chazaro 7334) I S. polyrhizus (C. Ruiz et al. 566) J S. sp. (C. Ruiz et al. 608).