Abstract: The present paper contributes the knowledge of wood structure of Manglie- tiastrum sinicum Law, a new monotypic genus of the family Magnoliaceae. The anatomical feature of this wood is described as follows: Diffuse-porous wood ; pores 15-25 per sq. mm, solitary or in radial multiples of 3- 4 (may be up to 6) pore cluster also occur but rare, more or less angular in shape, perforation plates scalariform, with 6-12 bors (may be up to 17), generally 7-8 or 10, intervascular pittings scalariform with fine spiral thickenings; vessel elements 748-1224, generally 876 longl wood rays heterogeneous, type IIA with 1-2, sometimes 3-4 rows of upright cells on both margins, uniserate rays 3-7 cells (may be up to 13) or 193-230u high, the multiseriate rays 3-5 cells or 68-119.2u wide, and 16-22 cells or 340-748u height; oil cells absent, fiber-tracheids 0.8-2.8 mm, generally 1.5 mm long; wood parenchma terminal, narrow banded (generally 7-8 cells wide, may be up to 12), rarely scanty paratracheal.

Key words: wood, anatomy, new genus, law, China

摘要： 本文对最近在我国云南省西畴县热带雨林中发现的木兰科中的一个新的单种属—华盖木(Manglietastrum sinicum Law)的木材解剖特征进行首次报道:它具有较稀的管孔数目;单管孔占优势;导管侧壁具细螺纹加厚，底壁穿孔板横条数较多，为6—12枚，高达17枚；轴向薄壁组织轮界状，宽达9—12列细胞，还偶有稀疏傍管薄壁组织；木射线为Kribs异形ⅡA型，且在少数多列线中具略长的单列翼部分。这些解剖的，以及联系到外部形态特征，虽然和近缘的木莲属Manglietia Blume 存在着一定的差别。但与本科其他各属比较，则又与“拟木莲属”(“Paramanglieia ”Hu ＆ Cheng)、香木兰属Aromadendron Blume、榻榔本属 Talauma Juss．及木兰属Mognolia Linn．的多数种类，在木材构造中留存有较多的原始特征相类似。

关键词: 木兰科, 华盖木属, 木材解剖, 近缘属