全球气候变化和人类活动致使生物多样性受损，为保护濒危的喜马拉雅榆（Ulmus wallichiana），研究人员开展结合种群遗传学和物种分布模型的研究。研究确定了遗传多样性热点和长期适宜区域等，对制定保护策略意义重大。

Development of microsatellite markers for the European white elm (Ulmus laevis Pall.) and cross-species amplification within the genus Ulmus. Mol Ecol Notes 3 : 598–600. Google Scholar ...

Elm tree. Elms are deciduous and semi-deciduous trees making up the genus Ulmus, family Ulmaceae, found throughout the Northern Hemisphere from Siberia to Indonesia, Mexico to Japan.

American elm trees (Ulmus americana) were once very common as forest and landscape trees in the eastern U.S. Their graceful vase shape and wide canopy made them especially popular for lining city ...

The little genius inside took one look and identified the tree as Ulmus americana — that is, an American elm. Now let that sink in. If you don’t get the significance, you will in a minute.

A: Chinese elm, Ulmus parvifolia, also known as lacebark elm, is an excellent tree. The bark is particularly attractive, looking like a big jigsaw puzzle. This elm is fast-growing, drought ...

One of the largest old elm trees in Toronto — possibly in all of southern Ontario — is on its last legs. But as the city finalizes plans to take down the Barton Avenue landmark next week, a ...

A massive American elm tree that stood for generations on the lawn of the First Presbyterian Church 1793 in Washington took its final bow on Monday as crews began its removal. The 100-foot tree was ...