Salix nigra, the black willow, is a species of willow native to eastern North America, from New Brunswick and southern Ontario west to Minnesota, and south to northern Florida and Texas.
Salix scouleriana is a species of willow native to northwestern North America. Other names occasionally used include fire willow, Nuttall willow, mountain willow, and black willow.
Salix barrattiana is a species of flowering plant in the willow family known by the common name Barratt's willow. It is native to North America, where it is distributed across Alaska and western Canada, with also a few populations in Montana and Wyoming. These disjunct populations are probably relics from a time when the climate was colder. The southernmost population is technically in Wyoming, but it is located at the Montana state line and it is limited to one clone of all-staminate plants within an area of 100 square meters (1,100 sq ft) in a high-elevation habitat.
Salix drummondiana is a species of willow known by the common name Drummond's willow. It is native to western North America from Yukon and the Northwest Territories in the north to California and New Mexico in the south. It is a resident of moist mountain habitats, including forests, riverbanks, and floodplains.
Salix geyeriana is a species of willow known by the common names Geyer's willow, Geyer willow and silver willow. The type specimen was collected by the botanist Karl Andreas Geyer, for whom it was named. Its conspicuous, yellow flowers begin to bloom as early as March, to as late as the end of June.
Salix gooddingii is a species of willow known by the common name Goodding's willow, or Goodding's black willow. It was named for its collector, Leslie Newton Goodding.
Salix lemmonii is a species of willow known by the common name Lemmon's willow, named after J.G. Lemmon. It is native to western North America from British Columbia to California to Colorado, where it grows in moist and wet areas in mountain coniferous forest habitat, such as streambanks and meadows.
Salix planifolia is a species of willow known by the common names planeleaf willow, diamondleaf willow, and tea-leafed willow. It is native to northern and western North America, including most of Canada and the western United States. It grows in many types of arctic and alpine habitats in the north, and mountainous areas in the southern part of its range.
The ecology of the Rocky Mountains is diverse due to the effects of a variety of environmental factors. The Rocky Mountains are the major mountain range in western North America, running from the far north of British Columbia in Canada to New Mexico in the southwestern United States, climbing from the Great Plains at or below 1,800 feet (550 m) to peaks of over 14,000 feet (4,300 m). Temperature and rainfall varies greatly also and thus the Rockies are home to a mixture of habitats including the alpine, subalpine and boreal habitats of the Northern Rocky Mountains in British Columbia and Alberta, the coniferous forests of Montana and Idaho, the wetlands and prairie where the Rockies meet the plains, a different mix of conifers on the Yellowstone Plateau in Wyoming and in the high Rockies of Colorado and New Mexico, and finally the alpine tundra of the highest elevations.
Salix alaxensis is a species of flowering plant in the willow family known by the common names Alaska willow and feltleaf willow. It is native to northern North America, where it occurs throughout Alaska and northwestern Canada.
Salix arbusculoides is a species of flowering plant in the willow family known by the common name little tree willow. It is native to northern North America, where its distribution extends across Alaska and most of Canada.
Salix brachycarpa is a species of flowering plant in the willow family known by the common names barren-ground willow, small-fruit willow and shortfruit willow.
Salix fuscescens is a species of flowering plant in the willow family known by the common name Alaska bog willow. It is native to northern North America, where it occurs throughout much of Alaska and across northern Canada. It is also present in Eurasia.
Salix glauca is a species of flowering plant in the willow family known by the common names gray willow, grayleaf willow, white willow, and glaucous willow. It is native to North America, where it occurs throughout much of Alaska, northern and western Canada, and the contiguous United States south through the Rocky Mountains to northern New Mexico. It can also be found in Greenland, northwestern Europe, and Siberia.
Salix hastata is a species of flowering plant in the willow family, known by the common name halberd willow. It has an almost circumpolar distribution, occurring throughout the northern latitudes of the Northern Hemisphere, most frequently found near the coast of the Arctic Ocean. In Alaska, it occurs in the north and in the central mountains. It also occurs in northwestern Canada, and in Norway and Russia, as well as various alpine or mountainous areas of Eurasia.
Salix monticola is a species of flowering plant in the willow family known by the common names mountain willow, cherry willow, serviceberry willow, and park willow. It is native to the United States, where it occurs in the Rocky Mountains region from Wyoming to Arizona and New Mexico. It also occurs in Alaska and parts of Canada.
Salix myrtillifolia is a species of flowering plant in the willow family known by the common name blueberry willow. It is native to northern North America, where it occurs in Alaska and much of Canada.
Salix pulchra is a species of flowering plant in the willow family, known by the common names diamondleaf willow, tealeaf willow, and thin red willow. It is native to northern North America, where it occurs in Alaska, Yukon, the Northwest Territories, and Nunavut. The species is also found in northern British Columbia, and occurs in Russia.
Salix richardsonii is a species of flowering plant in the Salicaceae, or willow family. It is known by the common names Richardson's willow and woolly willow. It is native to Russia and northern North America, where it occurs in Alaska and northern Canada. Some authorities consider it to be a subspecies, Salix lanata subsp. richardsonii(Hook.) A. K. Skvortsov rather than a species itself.
Salix repens, the creeping willow, is a small, shrubby species of willow in the family Salicaceae, growing up to 1.5 metres in height. Found amongst sand dunes and heathlands, it is a polymorphic species, with a wide range of variants. In the UK, at least, these range from small, prostrate, hairless plants at one end of the spectrum to taller, erect or ascending silky-leaved shrubs at the other. This wide variation in form has resulted in numerous synonyms.
