The grow progress of bulb is divided to 5 stages: probulb idiophase, probulb enlargement stage, primarybulb idiophase, bulb weight fast gain stage and bulb plenum stage.

地下鳞茎鳞茎和侧鳞茎两部组成，其长发育可划5阶段：鳞茎化期、鳞茎膨大期、侧鳞茎形成期、鳞茎快速膨大期、鳞茎充实期。