Stamens 2, adnate to abaxial side of corolla tube near mouth, slightly exserted;
雄蕊2,贴生于花冠筒接近口部,稍外露的背面的边;
Stamens 2, adnate to abaxial side of corolla tube near or above middle, included;
雄蕊2,贴生于在或在上部中间附近的花冠筒的背面面,包括;
Stamens 2, adnate to abaxial side of corolla tube near base or rarely above middle, included;
雄蕊2,贴生于花冠筒近基部或很少在中部以上的背面的边,包括;
Stamens 2, adnate to abaxial side of corolla tube below middle, included;
雄蕊2,贴生于花冠筒中间以下的背面的边,包括;
Stamens 2, adnate to abaxial side of corolla tube near middle, seldom to near base, included;
雄蕊2,贴生于花冠筒近中部的背面的边,很少对近基部,包括;
staminodes 2, adnate to abaxial side of corolla tube.
退化雄蕊2,贴生于花冠筒的背轴边。