protected from grazing, and possibly from rodents, in order to facilitate establishment and growth of new seedlings. If at all possible, grass species which are capable of high grazing intensity should be encouraged, and even some new or introduced species could be used (Asay, 1975). The grass, Htlaria jamesti (galleta), an extremely valuable grazing plant, will be an important grass species to use for reseeding the area, since it is abundant there under natural conditions (Rhoads, 1974; Leavitt, 1975). Galleta seed production is low and poor establishment has been experienced for seeding operations on rangeland (West et al., 1972); however, the amplitude of galleta is wide. The following discussion is quoted. from West et al. (1972) because of relevance to revegetation work at the TTR. "Throughout most of its range, especially in the northern portion, galleta endures some periods of freezing temperatures and snow cover. At all northern locations investigated, the mean daily minimum temperatures are normally below freezing from November through March. In their report on studies in the Escalante Desert where galleta is a prominent forage species, Cook and Hurst (1962) state that about 60% of the annual precipitation is snow. At the extreme northern end of its range, galleta is found only on the exposed south-facing slopes (Gibbens and Fisser, 1970) which indicates that low winter temperatures might be quite important in limiting its northward distribution. “At the southern extremes of its range, quite the opposite situation exists. Pinkney (1969) stated that H. jamesti apparently is better adapted to cooler environments than the other Ailarta species he studied. Of the four species investigated (H. jamesit, H. belangert, H. mutica, and #. rigitda), he found galleta to grow on sites with the lowest monthly mean temperatures of 12°C and the lowest mean monthly maximum temperatures 22°C, "From its common occurrence in various desert communities, it is apparent that galleta can endure arid environments. According to Knight et al. (1908) it is ‘distinctively a desert grass.' Several references have been made in the literature to galleta growing well in areas where the mean annual precipitation is less than 25 cm (Bleak et al., 1965; Cook and Hurst, 1962; Bridges, 1941; Hickey and Garcia, 1964; Vallentine, 1961). At Hanksville, Utah, galleta is abundant in certain plant communi- ties where the mean annual precipitation is less than 25 cm (Bleak et al., 1965; Cook and Hurst, 1962), galleta survives and appears to be in good vigor although the mean annual precipitation is only about 9.4 cm. Bridges (1941) seeded galleta on the Jornada Plain in New Mexico where precipitation during the growing season of July 1 to October 31 is under 15 cm and the potential evaporation is about 94 cm. "Galleta is found in a wide variety of precipitation patterns. Its habitat varies from areas where most of the moisture comes during the winter and summer droughts are common (Bleak et al., 1965; Cook and Hurst, 1962; Vallentine, 1961) to areas where as much as 60% of the moisture comes during the growing season (Hickey and Garcia, 1964; Jameson, 1962, 1965; Lotspeich and Everhart, 1962; Vallentine, 1961). In many of 68