Abstract: The studies of wood anatomy of 3 species Vernicia fordii(Hemsl)Airy Shaw, V. montnana Lour. and Aleurites moluccana (L.) Willd were carried out. In the woods of Vernicia fordii and V.montana, growth ring distinct, semi-ring porous, axial parenchyma diffuse, most of the rays uniseriate, less biseriate or triseriate, mostly Het III type rays, crystal sin ray cells and axial parenchyma; but on the wood of Aleurites moluccana, growth ring distinct to faint, diffuse porous, axial parenchyma diffuse-diffuse-in-aggregate, most of the rays biseriate, less uniseriate, mostly Het I type rays, crystals only in axial parenchyma. In percentage of solitary vessel and inter-vessel diameters, there were differences among Vernicia fordii,Vernicia montana and Aleurites moliccana. So the differences in these wood characters were distinct among Vernicia fordii, V.montana and Aleurites moluccana. On the other hand, some quantitative and anatomical characters such as: frequency of vessels and rays, the length of vessel members and fibers, the perforation types, inter-vessel pitting, the 3 species were very similar, In addition, the systematic status of Vernicia Lour. and Aleurites J. R. et G. Forst. was discussed with reference of the data obtained in this work.

Key words: Vernicia fordii, Vernicia montana, Aleurites moluccana, comparative wood anatomy

摘要： 对大戟科的油桐[Vernicia fordii(Hernsl)AiryShaw]。千年桐[Vernicia montana liour.]和石栗[Aleurits moluccana(L)Willd.]的木材进行了比较解剖学研究。油桐和千年桐生长轮明显，半环孔材，轴向薄壁细胞呈星散分布。大多数射线是单列射线，少数是双列或三列射线，绝大多数射线为异型Ⅲ；石栗的生长轮略明显，散孔材，轴向薄壁细胞呈星散－星散聚合分布。大多数射线是双列射线，少数是单列射线，绝大多数射线为异型Ⅰ，晶体只分布在轴向薄壁细胞中。油桐、千年桐和石栗在单孔率和管间纹孔等的数量特征上存在着差异。但在导管频率、导管分子长度、纤维长度等数量特征有表现出相似性。根据这3种大戟科植物的木材解剖学特征讨论了油桐属和石栗属的分类地位问题。

关键词: 油桐, 千年桐（木油树）, 石栗, 木材比较解剖