Fig. 4From: Biology of Nicotiana glutinosa L., a newly recorded species from an archaeological excavation site in EgyptMicrographs of Nicotiana glutinosa pollen grains. (A–B) LM micrographs: (A) equatorial view, (B) polar view. C–E SEM micrographs: (C) equatorial, (D) polar view, and (E) exine ornamentation SEMBack to article page