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Salix herbacea (Dwarf Willow, Least Willow or Snowbed Willow) is a species of tiny creeping willow
Willow

Willows, sallows, and osiers form the genus Salix, around 400 species of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere....
 (family Salicaceae
Salicaceae

Salicaceae is a family of flowering plants. Recent genetics studies by the Angiosperm Phylogeny Group has greatly expanded the circumscription of the family to contain 57 genera....
).

It is adapted to survive in harsh Arctic and sub-Arctic environments, and has a wide distribution on both sides of the North Atlantic
Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions; with a total area of about 106.4 million square kilometres . It covers approximately one-fifth of the Earth's surface....
, in Arctic northwest Asia
Asia

Asia is the world's largest and most populous continent. It covers 8.6% of the Earth's total surface area and, with over 4 billion people, it contains more than 60% of the world's current human population....
, northern Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
, Greenland
Greenland

Greenland is a member country of the Kingdom of Denmark located between the Arctic Ocean and Atlantic Oceans, east of the Canadian Arctic Archipelago....
, and eastern Canada
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
, and further south on high mountain
Mountain

A mountain is a landform that stretches above the surrounding land in a limited area usually in the form of a peak. A mountain is generally steeper than a hill....
s, south to the Pyrenees
Pyrenees

The Pyrenees are a mountain range in southwest Europe that form a natural border between France and Spain. They separate the Iberian Peninsula from the rest of continental Europe, and extend for about from the Bay of Biscay to the Mediterranean Sea ....
, the Alps
Alps

The Alps is the name for one of the great mountain range systems of Europe, stretching from Austria and Slovenia in the east; through Italy, Switzerland, Liechtenstein and Germany; to France in the west....
 and the Rila
Rila

Rila is a mountain range in southwestern Bulgaria and the highest mountain range of Bulgaria and the Balkans, with its highest peak being Musala at 2,925 metre....
 in Europe, and the northern Appalachian Mountains
Appalachian Mountains

The Appalachian Mountains or , often called the Appalachians, are a vast mountain range in eastern North America. Definitions vary on the precise boundaries of the Appalachians....
 in the eastern United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
.






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Salix herbacea (Dwarf Willow, Least Willow or Snowbed Willow) is a species of tiny creeping willow
Willow

Willows, sallows, and osiers form the genus Salix, around 400 species of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere....
 (family Salicaceae
Salicaceae

Salicaceae is a family of flowering plants. Recent genetics studies by the Angiosperm Phylogeny Group has greatly expanded the circumscription of the family to contain 57 genera....
).

It is adapted to survive in harsh Arctic and sub-Arctic environments, and has a wide distribution on both sides of the North Atlantic
Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions; with a total area of about 106.4 million square kilometres . It covers approximately one-fifth of the Earth's surface....
, in Arctic northwest Asia
Asia

Asia is the world's largest and most populous continent. It covers 8.6% of the Earth's total surface area and, with over 4 billion people, it contains more than 60% of the world's current human population....
, northern Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
, Greenland
Greenland

Greenland is a member country of the Kingdom of Denmark located between the Arctic Ocean and Atlantic Oceans, east of the Canadian Arctic Archipelago....
, and eastern Canada
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
, and further south on high mountain
Mountain

A mountain is a landform that stretches above the surrounding land in a limited area usually in the form of a peak. A mountain is generally steeper than a hill....
s, south to the Pyrenees
Pyrenees

The Pyrenees are a mountain range in southwest Europe that form a natural border between France and Spain. They separate the Iberian Peninsula from the rest of continental Europe, and extend for about from the Bay of Biscay to the Mediterranean Sea ....
, the Alps
Alps

The Alps is the name for one of the great mountain range systems of Europe, stretching from Austria and Slovenia in the east; through Italy, Switzerland, Liechtenstein and Germany; to France in the west....
 and the Rila
Rila

Rila is a mountain range in southwestern Bulgaria and the highest mountain range of Bulgaria and the Balkans, with its highest peak being Musala at 2,925 metre....
 in Europe, and the northern Appalachian Mountains
Appalachian Mountains

The Appalachian Mountains or , often called the Appalachians, are a vast mountain range in eastern North America. Definitions vary on the precise boundaries of the Appalachians....
 in the eastern United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
. It grows in tundra
Tundra

In physical geography, tundra is an biome where the tree growth is hindered by low temperatures and short growing seasons. The term tundra comes from Kildin Sami tund?r, which means "uplands, treeless mountain tract." There are two types of tundra: Arctic tundra and alpine tundra....
 and rocky moorland
Moorland

File:Pennine scenery.jpgMoorland or moor is a type of Habitat found in upland areas, characterised by low growing vegetation on acidic soils....
, usually at over 1,500 m altitude in the south of its range but down to sea level in the Arctic.

It is one of the smallest woody plant
Woody plant

A woody plant is a Vascular tissue plant that has a Perennial plant Plant stem that is above ground and covered by a layer of thickened bark. Woody plants are adapted to survive from one year to the next; the stem supports continued vegetative growth above ground from one year to next....
s in the world. It typically grows to only 1-6 cm in height and has round, shiny green leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 1-2 cm long and broad. Like the rest of the willows, Dwarf Willow is dioecious
Plant sexuality

Plant sexuality covers the wide variety of sexual reproduction systems found across the plant kingdom. This article describes Morphology aspects of sexual reproduction of plants....
, with male and female catkin
Catkin

A catkin or ament is a slim, cylindrical flower cluster, with inconspicuous or no petals, usually wind-pollination but sometimes insect pollinated ....
s on separate plants. As a result the plant's appearance varies; the female catkins are red-coloured, while the male catkins are yellow-coloured.