Ulmus is a genus of mostly large, deciduous trees found throughout much of the Northern Hemisphere. Until the introduction of the Dutch elm disease pathogen in 1930, the American elm (U. americana) was one of the most ...

Hydrangea is a genus of about 23 species native to Asia and the Americas. Hydrangeas are widely grown in both home and commercial landscapes and are one of the most economically important nursery crops in the US. With its ...

Tilia is a genus of of mostly large, deciduous trees native to Europe, Asia and North America. Known as linden or basswood in North America, they are popular ornamental shade trees with attractive dense foliage and fragrant ...

Rhaphiolepis is a genus of about 15 species of evergreen shrubs and small trees in the family Rosaceae. Ornamental species, commonly known as Indian hawthorn, include R. indica, R. umbellata, and the hybrid R. x delacourii. ...

Crataegus is a large genus of shrubs and small trees in the rose family commonly known as hawthorn. This popular ornamental has showy pink or white flowers in spring and colorful berry-like fruit. Some species also have ...

Juniperus is a genus of about 60 species of conifer trees, shrubs and groundcovers. Junipers are widely grown for their diverse ornamental qualities including needle-like foliage in shades ranging from green to blue. ...

Cornus is a genus of about 60 species of mostly shrubs and small trees commonly known as dogwoods. This genus includes many ornamentals, but the most popular is the flowering dogwood, Cornus florida. Native to the Eastern ...

Acer is a genus of about 120 species of maple trees and shrubs. Offering a wide range of choices for size, growth habit, leaf shape and brilliant fall color, maples are frequently found in residential and commercial ...

The genus Betula consists of about 60 species of deciduous hardwood trees and shrubs native to Europe, Asia and North America. Commonly known as birches, they are most often associated with the popular white-barked types. ...

Ilex is a widely-distributed genus of over 400 species of evergreen or deciduous trees, shrubs and climbers. Holly flowers may be inconspicuous, but their distinctive foliage, colorful fruit and diverse forms provide plenty ...