| Salix petrophila | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Salicaceae |
| Genus: | Salix |
| Species: | S. petrophila |
| Binomial name | |
| Salix petrophila Rydb. | |
Salix petrophila, commonly known as alpine willow [1] and Rocky Mountain willow, is a Northwest American mountain shrub in the willow family (Salicaceae). [2]
It can be found in the subalpine zone and alpine zone of the Sierra Nevada range in wetlands such as moist banks and wet meadows, up to 9,900 to 13,000 feet (3,000 to 4,000 m). [2]
It is often overlooked because although sprawling and mat-forming, it is very small for a shrub, growing to only 4 inches (0.10 m) tall. [2]
Leaves are 3⁄4 to 1+3⁄4 inches (0.019 to 0.044 m) long, elliptic, with soft hairs on the surface when young. [2] The other mat forming Sierra Nevada alpine willow, Salix nivalis , has smaller leaves (1⁄4 to 7⁄8 inch (0.0064 to 0.0222 m) that are hairless when young. [2]
Each plant has either all male or all female flowers, with an inflorescence that is a dense, upright catkin, growing to 2 inches (0.051 m). [2]
It is pollinated by ants, as are some other willows. [2]
Salix herbacea, the dwarf willow, least willow or snowbed willow, is a species of tiny creeping willow adapted to survive in harsh arctic and subarctic environments. Distributed widely in alpine and arctic environments around the North Atlantic Ocean, it is one of the smallest of woody plants.
Salix polaris, the polar willow, is a species of willow with a circumpolar distribution in the high arctic tundra, extending north to the limits of land, and south of the Arctic in the mountains of Norway, the northern Ural Mountains, the northern Altay Mountains, Kamchatka, and British Columbia, Canada.
Salix arctica, the Arctic willow, is a tiny creeping willow. It is adapted to survive in Arctic conditions, specifically tundras.
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 reticulata, the net-leaved willow, or snow willow, is a dwarf willow, native to the colder parts of Europe, North America, and Northern Asia. It is found in the western United States, including the Sierra Nevada and Rocky Mountains. In Europe it extends south through the Carpathian Mountains and Alps to the Pyrenees and the mountains of Bulgaria and North Macedonia. It is common in Canada, Greenland and Finland, and present but rare in Scotland.
Salix lasiolepis is a species of willow native to western North America.
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 triandra, with the common names almond willow, almond-leaved willow or black maul willow, is a species of willow native to Europe and Western and Central Asia. It is found from south-eastern England east to Lake Baikal, and south to Spain and the Mediterranean east to the Caucasus, and the Alborz Mountains. It usually grows in riparian habitats, on river and stream banks, and in wetlands.
Salix delnortensis is a species of willow known by the common name Del Norte willow.
Salix laevigata, the red willow or polished willow, is a species of willow native to the southwestern United States and northern Baja California.
Salix eastwoodiae is a species of willow known by the common names mountain willow, Eastwood's willow, and Sierra willow. It was first described by Bebb in 1879 as Salix californica. This name was later found to be illegitimate, as Lesquereux had given the same name to a fossil willow in 1878.
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 orestera is a species of willow known by the common name Sierra willow, or gray-leafed Sierra willow. It is native to the Sierra Nevada of California and western Nevada, where it grows in moist areas in high mountain subalpine and alpine climates. It can also be found in Oregon.
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 arizonica is a species of willow known by the common name Arizona willow. It is native to the southwestern United States, where it occurs in Arizona, Colorado, New Mexico, and Utah.
The flora of the U.S. Sierra Nevada alpine zone is characterized by small, low growing, cushion and mat forming plants that can survive the harsh conditions in the high-altitude alpine zone above the timber line. These flora often occur in alpine fell-fields. The Sierra Nevada alpine zone lacks a dominant plant species that characterizes it, so may or may not be called a vegetation type. But it is found above the subalpine forest, which is the highest in a succession of recognized vegetation types at increasing elevations.
Sierra willow is a native shrub that grows in Central and Northern California, USA, primarily in the White and Inyo Mountains, the High Sierra Nevada and Sierra Nevada East regions. It is fast growing and moderately long-lived. It grows in an upright form to a height of 10 feet (3.0 m), with active growth during the spring and summer. Flowers are yellow and bloom in the mid-spring. Leaves are medium green and deciduous. It tends to grow in meadows and wet places. Sierra Willow is a common name for several plants and may refer to:
Salix tweedyi, or Tweedy's willow, is a shrub in the willow family. It is native to the northwestern United States.
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