Ads
related to: ulmus americana flowering pollination rose vine shrub tree purple leaves
Search results
Results from the WOW.Com Content Network
The family is a group of evergreen or deciduous trees and shrubs with mucilaginous substances in leaf and bark tissue. Leaves are usually alternate on the stems. The leaf blades are simple (not compound), with entire (smooth) or variously toothed margins, and often have an asymmetrical base. The flowers are small and either bisexual or ...
Few flowering plants self-pollinate; some can provide their own pollen (self fertile), but require a pollinator to move the pollen; others are dependent on cross pollination from a genetically different source of viable pollen, through the activity of pollinators. One of the possible pollinators to assist in cross-pollination are honeybees.
The American elm is a deciduous tree which, under ideal conditions, can grow to heights of 21 to 35 meters (69 to 115 feet). [3] The trunk may have a diameter at breast height (dbh) of more than 1.2 m (4 ft), supporting a high, spreading umbrella-like canopy.
Princeton elms planted in North America are highly prone to leaf damage by Japanese beetles Popillia japonica. [11] Trees grown in the UK have also proven very susceptible to damage by leaf-feeding insects, far more so than native or Asiatic elms. Henry noted that such damage was common to all American Elm Ulmus americana grown in the UK. [12]
The American elm cultivar Ulmus americana 'New Harmony' was raised by the Maryland Agricultural Research Service and released by the United States National Arboretum in 1995, along with 'Valley Forge'. 'New Harmony' proved the most successful U. americana cultivar in the US National Elm Trial, averaging a survival rate of 85.5% overall. [1]
Elms are deciduous and semi-deciduous trees comprising the genus Ulmus in the family Ulmaceae.They are distributed over most of the Northern Hemisphere, inhabiting the temperate and tropical-montane regions of North America and Eurasia, presently ranging southward in the Middle East to Lebanon and Israel, [1] and across the Equator in the Far East into Indonesia.
A clone cultivated in China as Ulmus americana 'Pendula', top-grafted on Ulmus pumila stock, is neither Ulmus americana nor Scampston elm (formerly mis-named Ulmus americana 'Pendula'), but, in the case of the majority of photographs on the Plant Photo Bank of China, a weeping form of U. glabra Huds., probably 'Camperdownii'. [18] [19]
The elm cultivar Ulmus 'Purpurea', the purple-leaved elm, was listed and described as Ulmus Stricta Purpurea, the 'Upright Purpled-leaved Elm', by John Frederick Wood, F.H.S., in The Midland Florist and Suburban Horticulturist (1851), [1] as Ulmus purpurea Hort. by Wesmael (1863), [2] and as Ulmus campestris var. purpurea, syn. Ulmus purpurea Hort. by Petzold and Kirchner in Arboretum ...
Ads
related to: ulmus americana flowering pollination rose vine shrub tree purple leaves