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SUMMARY
The probable introduction into the United States of Ustilago turcomanica on Agropyron orientale var. lasianthum from Turkestan is described. This smut fungus is somewhat similar to U. bullata but is considered distinct from that species by characteristics of spore germination. Inoculations have shown that species of Elymus and Agropyron are hosts and that infection occurs in the seedling stage of the host.
Characteristics of spore germination, behavior in culture, and sexuality are described.