Aporocactus Lemaire

Pollen.

trizonocolpate, radially symmetrical, isopolar with circular contour in polar view. Shape: subprolate (P/E=1.15). Apertures: 3, colpate, large; polar area of medium size (PAI=0.36). Measurements: pollen grains large to very large, (75.98)93.62(110.47) × (80.52)106.91(117.69) μm in equatorial view; exine thickness (3.16)3.66(4.34) μm . Ornamentation: smooth surface with tectum perforate, ornated with spinules of (1.31)1.64(1.93) μm length × (1.18)1.53(2.10) μm diameter in base; perforations (0.14) 0.23(0.34) μm in diameter.

Species examined.

Aporocactus martianus (Zucc.) Britton & Rose. ( México, Veracruz. H. Narave et al. 308 XAL).