国产阔叶树材晶体的研究

用扫描电镜和光学显微镜观察了国产阔叶树材６２０种（隶７６科２６２属）木材的构造特征。其中含晶体的有２３１种（隶４４科１１１属），占所观察树种的３７％。晶体的主要形态为菱形，其它为针晶体，针晶束，柱状晶体，晶砂，晶簇等。晶体的形态，分布及其方式与树种有关，品体在木材识别与分类上具有一定的意义。晶体可以视为区分阔叶树材属或种的辅助特征。

A STUDY ON CRYSTALS IN WOOD SPECIES OF CHINESE ANGIOSPERM

620 Chinese hardwood species were investigated into their xylem crysta-lliferous cells by means of SEM and light microscopy. 231 wood species from114 genera and 44 families were found containing crystalliferous cells in theirxylem paranchyma cells, 7 types of crystals were classified and described inthe present paper. They were prismatic, acicular, raphide, styloid or elonga-te, crystal sand, small cubic and druse, of which types, size and locationwere proved to be of diagnostic value. The occurrence of crystalliferous cellsin xylem is common to many Chinese hardwood species, specially tropic species.