Stamens 10, free, unequal in size, 7 perfect and 3 reduced to staminode, filaments unequal, anther dithecous, basifixed, introrse and dehiscing by terminal pores.
3.
There are five stamens, inserted on the base of the corolla, alternate with its lobes, exserted; filaments slender; anthers bright yellow, oblong, introrse, versatile, two-celled; cells opening longitudinally.
4.
There are 15 20 stamens, inserted on the calyx tube; filaments thread-like; anthers purplish, introrse, two-celled; cells opening longitudinally; the pistil has a superior ovary in the bottom of calyx tube, one-celled, with two ovules.
5.
If the pollen is released from the anther through a split on the outer side ( relative to the center of the flower ), this is "'extrorse "'dehiscence, and if the pollen is released from the inner side, this is "'introrse "'dehiscence.
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