boil smut(n = noun.plant) ustilago maydis - a common smut attacking Indian corn causing greyish white swellings that rupture to expose a black spore mass;
is a kind of corn smut, cornsmut
is a member of genus ustilago, ustilago

aleppo boil, biskara boil, boil, boil down, boil over, corn smut, covered smut, delhi boil, false smut, flag smut, flag smut fungus, green smut, green smut fungus, head smut, loose smut, natal boil, onion smut, smut, smut fungus, smut grass, stinking smut, wheat flag smut