Flower Types, Pollen Morphology, and In Vitro Pollen Germination of Longan (Dimocarpus longan Lour.)

Longan (Dimocarpus longan Lour.) is an important tropical and subtropical fruit tree in Southeast Asia and China. We investigated flower type, morphology, and development, pollen morphology, and pollen vigor of a popular Chinese cultivar �Honghezi�. Results showed that the cultivar developed three types of flower, i.e. two types of male flowers (M1 and M2) and female flower (F).