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Nebraska sedge (Carex nebraskemis Dewey), a valuable and distinct species, can withstand a high degree of defoliation by livestock without being seriously damaged. To understand this species better and learn how it can withstand defoliation, shoot life history is being studied on a site in the Sierra National Forest, California. Initial results of the study (overwinter 1979-1980 and the 1980 growing season) indicate that (1) Nebraska sedge shoots live for more than one year; (2) a high proportion of vegetative shoots overwinter; (3) overwintering shoots have cores of live leaf tissue which can develop rapidly in spring; and (4) about half ofthe shoots surviving winter become reproductive and die. In addition, Nebraska sedge is now recognized as a culmless species. That helps account for its withstanding defoliation. Reproduction appears to be mainly vegetative, and a management goal of producing B” abundance of healthy rhizomes is suggested. Nebraska sedge (Carexnebraskemis Dewey) is found from Kansas to California and from New Mexico to Canada (Herman” 1970, Munz and Keck 1959). It is generally palatable to cattle and horses. A valuable species on many mountain meadows, Nebraska sedge is grazed heavily during summer and, in some areas, range managers consider it to be a key species. The foliage of Nebraska sedge is a silvery blue-green distinct from most other sedges. Its distinct color is evident about as soon as a shoot emerges, permitting even young shoots to be identified. Valuable and distinct as it is, little is known about Nebraska sedge except for its taxonomic relationships. It appears able to stand a high degree of defoliation and not be seriously damaged. But why this is so has remained obscure. The ability to overwinter in a vegetative state may be one reason. This note reports initial results from an on-going study of Nebraska sedge life history at Tule Meadow on the Sierra National Forest, California. Overwintering (1979-1980) and shoot history during the following growing season (1980) are discussed.

Nebraska Sedge (Carex nebraskensis Dewey): Observations on Shoot Life History and Management