侧蕊属（学名：Lomatogonium）是龙胆科下的一个属，为一年生、分枝草本植物。该属共有20余种，分布于北温带。

Lomatogonium is a genus of 18 species in the family Gentianaceae, found in cool temperate to subarctic regions of Asia, with two species (L. carinthiacum, L. rotatum) also in Europe and one species (L. rotatum) also in North America. By far the highest diversity is in China, with 16 species.