FIGURE 5 in Louteridium (Acanthaceae: Acanthoideae: Ruellieae: Trichantherinae): Taxonomy, Phylogeny, Reproductive Biology, and Conservation

FIGURE 5. Pollen of Louteridium (except for L. koelzii, which was unavailable). A. L. brevicalyx (Daniel & Steinmann 11913). B. L. chartaceum (Daniel & Butterwick 5905). C. L. costaricense (van der Werff 7019). D. L. dendropilosum (Daniel et al. 11784). E. L. donnell-smithii (Daniel & Véliz 11337). F. L. mexicanum (Breedlove & Thorne 30786). G. L. parayi (Daniel & Wendt 5805). H. L. parayi (Breedlove & Daniel 70889) with intine protruding from apertures (revealing their number). I. L. purpusii (Breedlove & Smith 31613). J. L. purpusii (Breedlove & Smith 31613), with intine protruding from apertures (revealing their number). K. L. rzedowskianum (Kruse 1380). L. L. tamaulipense (Hutchinson s.n.). All scales = 10 μm.