Floristic Geography of Lauraceae of Shenzhen, Guangdong

According to field collections and specimen identification, there are 8 genera, 41 species and 3 varieties of Lauraceae in Shenzhen, 3 of which are newly recorded, i.e., Beilschmiedia brevipaniculata, Machilus gamblei and M. robusta. Machilus has the most abundant species in Shenzhen, followed by Cinnamomum and Litsea. The dominant generic geographical elements of Lauraceae are the pan-tropical, tropical Asia and tropical America disjuncted elements. The species are dominated by the tropical Asian element and the endemic element to China, accounting for 45.45% of the total species respectively. The comparison of the geographical patterns of Lauraceae between Shenzhen and the surrounding areas showed that Shenzhen has the highest generic similarity coefficient with Hong Kong and the lowest with Jianfengling (Hainan).