Juncus saximontanus
Encyclopedia
Juncus saximontanus is a species of rush
Juncus
Juncus is a genus in the plant family Juncaceae. It consists of some 200 to 300 or more species of grassy plants commonly called rushes...

 known by the common name Rocky Mountain rush. It is native to much of western North America from Alaska
Alaska
Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

 to central Mexico, where it grows in wet habitat, often in mountainous areas, such as bog
Bog
A bog, quagmire or mire is a wetland that accumulates acidic peat, a deposit of dead plant material—often mosses or, in Arctic climates, lichens....

s and moist meadows.

This is a rhizomatous
Rhizome
In botany and dendrology, a rhizome is a characteristically horizontal stem of a plant that is usually found underground, often sending out roots and shoots from its nodes...

 perennial herb producing a clump of stems up to about 60 centimeters tall. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 is made up of several oval or spherical heads containing up to 25 flowers each. The flower has narrow, pointed brown segments not more than about 3 millimeters long. This rush is sometimes treated as a variety of Juncus ensifolius
Juncus ensifolius
Juncus ensifolius is a species of rush known by the common name swordleaf rush. It is native to much of western North America from Alaska to central Mexico, and into eastern Canada. It is present in Japan and far eastern Russia, and it has been introduced to many other regions of the world,...

.

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