Scanning electron microscopy studies of 60 genera and 118 species of the Poaceae revealed prominent spermoderm patterns. The
most common patterns observed (with percent occurrence) were simple reticulate with straight walls (48.3%), simple reticulate
with wavy walls (14.4%), and verrucate without pubescence (13.6%). No other pattern occurred in more than 10% of the species
observed. Some genera possess common spermoderm patterns among species while others do not.
Key words Poaceae - SEM - Spermoderm patterns