Abstract

Summary 1. The fungus was found associated with a diseased condition of Antirrhinum majus due to Rhizoctonia Solani and at times to Phyllosticta Antirrhini . 2. The appearance of the spiny chlamydospores attached to eseptate mycelium on the diseased plants and in the soil is described. 3. The organism has been grown in culture. 4. Chlamydospores similar to those on the host are developed in culture. Also a second spore form which may be either a bicellular structure or a thick-walled fusion cell. These arise by the fusion of two hyphal branches. 5. Neither of the two thick-walled structures has been germinated. 6. Cultural characteristics are dealt with. 7. It has been found impossible, so far as experiments have gone, to induce this fungus to attack living Antirrhinum plants.

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