通过官山树种调查及树于解析,初步选出了如下十五个树种作为今后试种推广,并对其形态特征、生长环境、经济价值及造林、采种、育苗技术作如下介绍,以供参考。亮叶桦Betula luminifera H Winkl(桦木科) (一)形态特征落叶乔木,高达25米,胸往80厘米。树皮灰白色,环状,清香,易燃烧。叶卵形至矩园形长4.5—10厘米,上面几无毛,下面沿脉疏生毛,侧脉12—14对,柄长1—2厘米,果苞长 Through the investigation of Guanshan tree species and tree analysis, the following fifteen tree species were initially selected as the promotion of future species cultivation, and their morphological characteristics, growth environment, economic value, afforestation, seed collection and seedling raising techniques are introduced as follows . Betula luminifera H Winkl (Betulaceae) (A) Morphological characteristics Deciduous trees, up to 25 meters, chest to 80 cm. Bark gray, ring, fragrance, easy to burn. Leaves ovate to the park-shaped 4.5-10 cm long, glabrous above, sparse hair along the veins below, lateral veins 12-14 pairs, handle length 1-2 cm, fruit bud length