花期7-8月，果期9月以后
Engler, Bot. Jahrb. 29: 556. 1900; Dunn in Notes Bot. Gard. Edinburgh 6: 188. 1915; Kudo in Mem. Fac. Sci. Agr. Taihoku Univ. 2: 185-1929; C. Y. Wu in Act. Phytotax. Sin. 8 (1) : 46. 1959; Hsuan in ibid. 10 (1) : 54. 1965
淡黄色
花冠淡黄色，长约2.8厘米，外面被极细的微柔毛，冠檐二唇形，上唇盔状，长约7毫米，下唇略短，近圆形，先端3裂