河北杨自然变异及类型划分

Natioral Variation and Type Classification of Populus hopeiensis

本文通过对河北杨分布区内5个主要省(区)的调查,总结了河北杨种内在冠形、干形、树枝、树皮、叶片、物候等性状上存在的自然变异,在此基础上划分出5个自然类型,并对各类型的形态、生长状况和分布作了描述。

Descirbes the natural variations of P.hopeiensis found in 5 main dis -tribution provinces (regions) . Five major types are classified according to varit.'ons in crown form, trunk form, dranching habit,bark appearance, leaf shape and phenophase. The morphology, growth habit and distribu tion of each type were also described.