This paper reports for the first time on the mode of pollination of many perennial Triticeae grasses and evaluates the mode of pollination as it relates to the genomically dr:fined genera of Dewey (1984). Self fenility was estimated by counting seed set on spikes that were enclosed in an isolation paper bag prior to anthesis to exclude foreign pollen. The latter genera can be grouped as follows: (1) Self-fertility was determined by measuring seed set on spikes that had been enclosed in white paper bags (7.5 cm x 66 cm) prior to anthesis to exclude For personal use only. The most self-fertile taxon of Pseudoroe-gneria was tetraploid (2n:28) P. spicata.The three most self-fertile plants averaged 22.0, 3\ 0, and 37 .6 self seeds per spike, whereas '7 of the 56 plants produced no self seeds on five spikes. Tetraploid P. stipfolia (Czern. ex. Nevski) A' . Lcive was also considerably more self-fertile than diploid P. sripifulia (Table 3). In spite of the presence of individual plants with quite high self-fertility, the genur; Pseudoroegneria must be considered as normally cross-pollinating.