Abstract
CHUNG, M. G. AND S. B. JONES, JR. (Botany Department, University of Georgia, Athens, GA 30602). Pollen morphology of Hosta Tratt. (Funkiaceae) and related genera. Bull. Torrey Bot. Club 116: 31-44. 1989.-Pollen grains of 22 taxa of Hosta and nine taxa of closely related monocotyledons were investigated by light microscopy (LM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). On the basis of exine omamentation and wall ultrastructure, the pollen of Hosta can be divided into five types; reticulate, reticulate-like, rugulate, rugulate-baculate, and rugulate-granulate. The rugulate-granulate type is the most common and can be divided into eight subtypes based on variation in shape and size of the granules and degree of density of the rugulose exine elements. There is some speciesspecific variation in exine ornamentation. On palynological grounds, it is suggested that Hosta, Hesperocallis, and Leucocrinum may have originated from a common group of ancestral plants.
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