The variation law and pattern of seven phenotypic traits of Alnus cremastogyne seeds and cones from 5 provenances in natural distribution were studied.

• 摘要研究了桤木自然分布区内的5个种源的球果长度、宽度、长宽比、果柄长和每粒质量等共7个表型性状的变异规律和模式。