The infection in the tobacco roots varied somewhat with the three endophytes(Table I), and all showed extensive secondary mycelium and chlamydospores had formed. The tomato plants(Table 2) were harvested earlier than the tobacco and the endophytes had not produced the chlamydospore stage. The data presented in this section shows that when all nutrients were supplied in an available form some growth stimulus could be found with each endophyte but the effects were variable and were not as marked as those reported by other workers (Gerdemann,I964;Baylis,I959).