Selenicereus (Hylocereus: Salmdyckia clade)

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

Selenicereus (Hylocereus: Salmdyckia clade)

Pollen.

trizonocolpate, radially symmetrical, isopolar with circular contour in polar view. Shape: Prolate-spheroidal to subprolate (P/E=1.01-1.16). Apertures: 3, colpate, large; polar area medium-sized (PAI=0.30-0.40). Measurements: pollen grains large to very large, (81.09)89.11(127.4) × (83.13)98.23(129.26) μm in equatorial view; exine thickness (1.94)2.92(4.56) μm. Ornamentation: smooth surface with tectum perforate, ornated with spinules of (1.17)1.61(2.07) μm length × (0.81)1.20(1.53) μm diameter in base; perforations (0.23)0.46(0.70) μm in diameter ( Figure 3H , 4C , 4D ).

Species examined.

S. megalanthus (K. Schumann ex Vaupel) Ralf Bauer (Colombia, Valle del Cauca. C. Ruiz et al. 563 CUVC); S. ocamponis (Salm-Dyck) Britton & Rose ( México, Michoacán. M. Cházaro 7334 MEXU); S. setaceus (Salm-Dyck ex DC) Ralf Bauer (Brazil, Rio de Janeiro. H. Bravo et al. 2755 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).

Figure 4. Pollen grains of tribe Hylocereeae (Scanning Electron Microscope photographs). A-D: Left polar view, right equatorial view A S. undatus (C. Ruiz et al. 560) B Weberocereus tunilla (C. K. Horich BGA 58344) C S. setaceus (H. Bravo et al. 2755). D-J: left polar view, left details of spinules and perforations D S. megalanthus (C. Ruiz et al. 563) E S. stenopterus (C. K. Horich s. n.) F S. triangularis (C. Gomez-Hinostrosa 2110) G Kimnachia ramulosa (L. Velasquez et al. 4884) H Pseudorhipsalis amazonica (E. Gudino 145) I S. alliodorus (A. Ruiz Velazco et al. 86) J S. glaber (C. K. Horich BGA 57239).