FIGURE 4. —A. Polyhedric pollen grain, 14–16 in Opuntia delafuentiana (Cactaceae: Opuntioideae), a new xoconostle from central Mexico

FIGURE 4. —A. Polyhedric pollen grain, 14–16 pores (x800). —B. Zoom of a pollen grain: reticle, foramens and part of two pores, with wide and glabrate walls (x2500). —C. Lenticular seed, irregular lateral aril, wider in the inferior left side (x25). —D. Basal view of the seed, lateral hilo-micropilar region, deep, micropile and funicle included, testa punteate (x30). —E. Lateral aril cells (x90). Reference specimen: C. Martínez-González 4 (MEXU).