Technical Abstract: Saltcedar (Tamarix ramosissima), also referred to as tamarix or tamarisk, is a shrub or small tree that is native to Central Asia. It was imported to western North America for use in ornamental and conservation plantings. It is not clear whether saltcedar invasion is the cause of changes in riparian communities or the consequence of stream changes in hydrology. Regardless, the presence of salt cedar is associated with dramatic changes in geomorphology, ground water availability, soil chemistry, plant community composition, and wildlife diversity. The germination of seeds of saltcedar are compared at a wide range of constant and alternating temperatures, 55, from 0EC through 40EC. Seeds were collected from the Walker River Delta in western Nevada over a 3 year period. For 2 of the 3 years of testing, optimum germination of 98% and 100% were observed, indicating the seed lots were highly viable. The temperatures that most frequently supported optimum germination were 10/20 (10EC for 16 hours, and 20EC for 8 hours), 10/25, 15/20, and constant 35EC.