Corolla white or yellowish green, tube longer than calyx, slightly 2-lipped, lower lip deeply 3-lobed, upper lip slightly 2-lobed, villous in throat.

• 花冠白色或黄绿色，筒部长于花萼，二唇形的稍，下唇3深裂，2裂的上唇稍，在喉内的具长柔毛。