1.Stamens 4, didynamous, inserted above middle of corolla tube, glabrous, included; anther locules distinct, pergent.
雄蕊4，花冠筒，无毛的二强雄蕊，着生的在中部以上，包括；
2.Stamens 4, didynamous, inserted on distal part of corolla tube, included.
雄蕊4，二强雄蕊，花冠筒的着生于上部，包括。
3.Stamens 4, didynamous, inserted at middle of corolla tube, slightly exserted.
雄蕊4，花冠筒，稍外露的二强雄蕊，着生的在中部。
4.Stamens 4, didynamous, included.
雄蕊4，二强雄蕊，包括。
5.Stamens 4, distinctly didynamous, inserted on basal part of corolla tube, usually included, sometimes slightly exserted;
雄蕊4，清楚二强雄蕊，基部花冠筒深裂的着生于，通常包括，有时稍外露；
6.Stamens 4, didynamous, somewhat exserted or included, inserted at base of corolla tube; filaments glabrous;
雄蕊4，二强雄蕊，有点外露的或包括，花冠筒的着生的在基部；
7.Stamens 4, fertile, didynamous, inserted at middle of corolla tube, included;
雄蕊4，能育，，插入在中部花冠筒，包括；
8.Stamens 4, didynamous, sometimes exserted;
雄蕊4，二强雄蕊，有时外露；
9.Stamens didynamous, anterior 2 longer, ascending to upper lip of corolla;
二强雄蕊的雄蕊，前面长，对上唇来说上升花冠；
10.Stamens 4, somewhat didynamous, included;
雄蕊4，有点二强雄蕊，包括；