Pollen grains in single flowers of shrub species were found to be almost ten times as many as that of herbs, while the tree species also have higher pollen grain numbers than congeneric shrub species.

• 对同一属内不同生活型植物的花粉数比较，发现乔木的单花花粉数高于灌木，灌木的单花花粉数明显高于草本。