Disocactus Lindley

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

Disocactus Lindley

Pollen.

trizonocolpate, radially symmetrical, isopolar with circular contour in polar view. Shape: varies from subprolate to prolate-spheroidal (P/E=1.13-1.18). Apertures: 3, colpate, large; polar area of medium size (PAI=0.33-0.34). Measurements: pollen grains large to very large, (80.36)97.51(116.99) × (99.25)112.18(125.04) μm in equatorial view; exine thickness (2.24)3.27(3.99) μm. Ornamentation: smooth surface with tectum perforate, ornated with spinules of (1.22)1.63(2.50) μm length × (1.07)1.45(2.06) μm diameter in base; perforations (0.30)0.61(0.98) μm in diameter ( Figure 3B ).

Species examined.

Disocactus ackermanii (Haw.) Ralf Bauer ( México, Oaxaca. R. Torres et al. 309 MEXU); Disocactus speciosus (Cav.) Barthlott ( México, Edo de México. J. Canek Ledesma 2211 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).