经调查,永安天然分布的竹类植物有11属63种(含变种、变型),属种分别占中国总数的28.2%和11.4%,占全省的64.7%和48.8%。其中红舌唐竹、湖南箬竹、毛箨茶秆竹、黄槽毛竹等4种为福建省竹类分布新记录。经类群分析表明,永安竹类植物以单轴散生和复轴混生类型为主,具明显的由丛生竹向散生竹过渡特性,是散生竹类和混生竹类的分布中心。区系地理分析表明,永安竹类植物有5个分布区类型(含亚型),其中东亚成分占首位。

According to investigation,there exists a total of 63 species and varieties falling into 11 genera of Bambusoideae which are natural distribution in Yong'an City,Fujian Province.The genera and species of Bambusoideae respectively account for 28.2% and 11.4% of China,and 64.7% and 48.8% of Fujian Province.Among them,4 species of Sinobambusa rubroligula,Indocalamus hunanensis,Pseudosasa maculifera var.hirsuta and Phyllostachys heterocycla cv.Luteosulcata are the new records of bamboo distribution in Fujian.By the analysis of types,the major bamboo plants in Yong'an City are mainly monopodial-scattered and sympodial-mixed species.Yong'an is the distributive center of cluster bamboo and mixed bamboo which also have an obviously transitive characteristic from cluster bamboo to seattered bamboo.Floristic analysis indicated that there are 5 distributive types of Bambusoideae in Yong'an (contains a sub-type),and the East Asia holds the first position.