Three anthracnose fungi, Collectotrichum truncatum, C. destructivism , and Glomerella glycines commonly occur on soybeans. Collectotrichum truncatum was the most active parasite of the group;Seed borne inoculum of C. truncatum was responible for several types of infection. They were: (1) pre-emergence killing, (2) seedling blight, (3) symptomless establishment of internal mycelium. The third type was investigated in detail. Mycelium from infected cotyledons became established in the cortical cells of the stem without any apparent effect upon them and remained localized in the immediate stem area until the time of flowering. It then resumed growth and penetrated the lower stem, petioles, and leaves, without the development of disease symptoms;C. truncatum occurred naturally on soybeans and lima beans;C. graminicolum, which at the present time includes a complex of curved spore forms, occurred on a wide range of grass hosts. Isolates from alfalfa and sweet clover with similar spore structure have been examined and until such time as this species is revised these isolates are referred to it;C. villosum from vetch and C. lindemuthianum from common garden bean are each distinct entities;C. trifolii has been obtained from red clover and alfalfa. All of the isolates examined have been distinct from the C. destructivm isolates by virtue of their shorter conidia;C. destructivum occurs naturally can red clover, sweet clover, alfalfa soybeans and peas. The cultures from soybeans and peas were weak parasites;Glomerella glycines has been found on mature soybean stems. Its conidial phase is not Colletotrichum glycines, but is a straight spored form similar to C. destructivum.