Answer: lycopodiums

AnswerCrossword Clue
lycopodiumsA fine, flammable powder consisting of club moss spores, formerly used as an absorbent in surgery, in experiments in the physical sciences, and in making fireworks
lycopodiumsLYCOPODIUM, a genus of mosslike plants, aka club moss
lycopodiumsA plant of a genus that includes the common club mosses