The research is about the anatomical features and variation of Avicennia marina from mangrove breeding base of Hegou in Guangxi Beihai. The results showed that the average values of fiber length and width were 674.2μm, 15.30μm respectively. The radial variation patterns of fiber length, from pith to bark, was decreasing first, then increasing, and fiber width was increasing first, then decreasing and then increasing again. The average values of vessel element length and width were 174.02μm and 39.89μm. From...