We show ultra‐low‐threshold lasing due to morphology‐dependent resonances from an europium (Eu)‐chelate‐doped microdroplet with ∼90 &mgr;m diameter. Spectra and spatial images between lasing and nonlasing are exhibited with comparison. Temporal responses are discussed from the viewpoint of the faster (direct) and slower (indirect) transitions in Eu chelates. ©1995 American Institute of Physics.