What is happening to the hawthorns? Half a century ago only ten species were recognized in North America, now there are more than 700 - Several lines of evidence indicate that many of the new forms are not new species but natural hybrids

被引：19

作者：

Standish, LM ^{[1
]}

机构：

[1] Harvard Univ, Bot Labs, Cambridge, MA USA

来源：

JOURNAL OF HEREDITY | 1916年 / 7卷

关键词：

D O I：

10.1093/oxfordjournals.jhered.a110717

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

引用

收藏

页码：266 / 279

页数：14

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