Anthracnose of Amacrinum howardii Hort., winter-flowering begonias Begonia×hiemalis Fotsch and Japanese chinquapin Castanopsis cuspidata var. sieboldii (Makino) Nakai occurred in Tokyo Metropolis in 1996. The causal fungus isolated from the diseased plants was identified as Colletotrichum acutatum Simmonds ex Simmonds by morphological observations and inoculation tests. This is the first report on anthracnose of A. howardii, begonias and Japanese chinquapin caused by C. acutatum in Japan.
