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LM (A) and SEM (B–I) micrographs of Phthirusa hutchisonii (from Colombia, coll. Hutchinson & Idrobo, MO s.n.). A. Four pollen grains in equatorial and polar view. B–D. Pollen grains in equatorial view. E. Pollen grain in polar view. F. Close-up of central polar area. G. Close-up of colpi. H, I. Close-ups of mesocolpium. Scale bars – 10 µm (A–E), 1 µm (F–I).
