雄蕊2，花冠筒的着生的在基部，几乎不外露。
Stamens 2, inserted at base of corolla tube, scarcely exserted.
叶密被长硬毛背面的特别是在脉上。花对生。显著被微柔毛有环的花冠筒在里面。
Leaves densely hirsute especially on veins of abaxial surface. Flowers opposite. Corolla tube conspicuously puberulent annulate inside.
结果显示：绿原酸主要分布于萼筒和花冠筒的内、外表皮细胞及外表皮下的几层细胞中；
The results showed that chlorogenic acid mainly distributed in the epidermis cells and the next layers cells of outer epidermis in calyx tube and corolla tube;
花有短筒，花冠2唇，裂片不相等，花色多样，有白色。紫色。淡紫色或粉色。
The flower has short canister, corollaceous 2 lips, lobation is unequal, diversity of design and color, have white, purple, lilac or pink.
花冠 筒 内丝状物为退化雄蕊的短花丝。
The thread in the corolla is the short filament of a degenerated stamen.
高脚碟状的花冠，圆筒状的筒部，喉缩小，没有鳞片，裂片对正确地重叠。
Corolla salverform, tube cylindric, throat narrowed, without scales, lobes overlapping to right.
高脚碟状的花冠，圆筒状的筒部，喉缩小，没有鳞片，裂片对正确地重叠。
Corolla salverform, tube cylindric, throat narrowed, without scales, lobes overlapping to right.
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