Search results
Results from the WOW.Com Content Network
The tree species Sorbus americana is commonly known as the American mountain-ash. [4] It is a deciduous perennial tree, native to eastern North America. [5]The American mountain-ash and related species (most often the European mountain-ash, Sorbus aucuparia) are also referred to as rowan trees.
Green’s mountain ash (S. scopulina) is native to the mountains from Alaska to California, and east to the Rocky Mountains and Northern Great Plains. It grows as a multi-stemmed shrub that is ...
Fraxinus americana, the white ash or American ash, is a fast-growing species of ash tree native to eastern and central North America. White ash trees are threatened by the invasive emerald ash borer .
Some northern hardwoods manage to survive amidst the spruce–fir ecosystem, namely yellow birch, American mountain ash, and pin cherry, the latter being especially common in areas damaged by fire. A typical southern spruce–fir understory is home to shrubs such as Catawba rhododendron, thornless blackberry, mountain cranberry, and witch-hobble.
In terms of biodiversity, the only comparable temperate deciduous forest regions in the world are in central China, Japan, and in the Caucasus Mountains.Both the Appalachians (along with the neighbouring Appalachian mixed mesophytic forests ecoregion) and central China contain relict habitats of an ancient forest that was once widespread over the Northern Hemisphere.
The common name of the species honors American botanist Edward Lee Greene. [5] Throughout the Cascade Mountains and the Pacific Northwest portions of its habitat, it is commonly called Cascade mountain-ash , sometimes listed as Sorbus scopulina var. cascadensis .
Sorbus decora is very similar to the closely related American mountain-ash (Sorbus americana). Like the American mountain-ash, the showy mountain-ash has odd-pinnately compound leaves and often large clusters of flowers and fruits. Showy mountain-ash can be distinguished by its shiny, sticky buds, [6] and its slightly larger flowers and fruit. [2]
Zanthoxylum parvum, known vernacularly as Shinners' tickletongue and small prickly-ash is considered by some botanists to be an isolated and aberrant population of Zanthoxylum americanum. Originally described by Scottish botanist Philip Miller in 1768, [ 4 ] Zanthoxylum americanum is type species of the wide-ranging genus Zanthoxylum in the ...