The pollen morphology of the Nyctaginaceae, a family of approximately 30 genera and 250–300 species, is extremely varied and contains the following general types: pantoporate grains with tubuliferous and spinulose sexine pattern; 3–4-colpate grains with coarse reticulate sexine patterns; 3-colpate grains with tegillate sexine patterns; 6-colpate grains; 12–15–18-panto-colpate grains; and 12-pantoporate grains. Detailed descriptions, scanning micrographs, and a discussion of taxonomical relevance are provided for the tribe Nyctagineae (Mirabileae).