中国龙脑香科植物纪要

广义的龙脑香科是泛热带分布。中国有 5属 12种 ,其中 1种为引种栽培 ,产云南、广西、海南及西藏。本科分布北界在印度的喜马偕尔邦 ,在该地粗壮娑罗双Shorearobusta约达北纬 31°。《中国植物志》所报道见于我国的纤细龙脑香Dipterocarpusgracilis确实未见于我国。我国自然生长的东京龙脑香Dipterocarpusretusus依据毛被的多少可分为 2个变种 ,它们可能同时出现在同一林中。由于毛被多少不是区分种的可靠特征 ,因此将河内坡垒Hopeahongayanensis及多毛坡垒H mollissima两者都归并到狭叶坡垒H chinensis。鉴于雄蕊数目的不确定性 ,海南所产的Hopeaexalata与越南所产的H reticulata就视为同一种 ,而采用后者作为种名。版纳青梅Vaticaxishuangbannaensis与广西青梅V guangxiensis两者以叶脉数目来区分是不可靠的 ,也应视为同种而采用后者作为种名。经野外实地考察 ,望天树Parashoreachinensis仍应恢复其原来的学名。

Notes on Dipterocarpaceae of China

Dipterocarpaceae s l. is a pantropical family.Twelve species in China, one of which is introduced, in five genera are distributed in Yunnan, Guangxi, Hainan and Xizang. The northern boundary of the family lies in Himachal State in India where Shorea robusta reaches nearly 31 degrees north. Dipterocarpus gracilis , which is reported in FRPS, is certainly not found in China. Two varieties of D retusus are recognised in China, which may co occur in the same stand.Both Hopea hongayanensis and H mollissima were reduced into H chinensis because tomentum is not a reliable character to differentiate dipterocarp species. Hopea exalata is considered as a synonym of H reticulata based on the instability of stamen number. Vatica xishuangbannaensis cannot be distinguished from V guangxiensis as the variation of the number of leaf lateral veins. Parashorea chinensis is confirmed to be placed in this genus by living materials in Chinese tropical area.