''Calamagrostis rubescens'' is a species of

grass Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns an ...

known by the common name pinegrass.

Distribution

It is native to western North America, including Canada from

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

Manitoba Manitoba ( ) is a Provinces and territories of Canada, province of Canada at the Centre of Canada, longitudinal centre of the country. It is Canada's Population of Canada by province and territory, fifth-most populous province, with a population o ...

and the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

from

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...

. It can be found in several types of habitat, including forest and woodlands.

Description

It is a

perennial A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

bunchgrass Tussock grasses or bunch grasses are a group of grass species in the family Poaceae. They usually grow as singular plants in clumps, tufts, hummocks, or bunches, rather than forming a sod or lawn, in meadows, grasslands, and prairies. As perennial ...

growing erect to heights between 60 centimeters and one meter. The

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. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

is a dense bunch or open array of spikelets. Each spikelet is about half a centimeter long and has a bent or twisted

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about the same length. This perennial grass grows mainly from creeping rhizomes. The leaves are mostly basal, narrow, and flat. The collar has conspicuous tufts of hair. The inflorescences is a narrow spike-like panicle usually less than 6" long. There is one floret per spikelet with several spikelets per branch. The awn on each floret is bent and twisted. Pinegrass is unusual in that it rarely flowers. It occurs in forest areas but only flowers under full sunlight in late June through August.

Gallery

File:Calamagrostis rubescens (5192270675).jpg, Calamagrostis rubescens (5192270675) File:Calamagrostis rubescens 4.jpg, Calamagrostis rubescens 4 File:Calamagrostis rubescens 6.jpg, Calamagrostis rubescens 6 File:J20160625-0005—Calamagrostis rubescens—RPBG (27805039592).jpg, J20160625-0005—Calamagrostis rubescens—RPBG (27805039592) File:Calamagrostis rubescens 5.jpg, Calamagrostis rubescens 5 File:Calamagrostis rubescens (5192869172).jpg, Calamagrostis rubescens (5192869172)

External links

*
Jepson Manual TreatmentUSDA Plants ProfilePhoto gallery
rubescens Bunchgrasses of North America Grasses of the United States Grasses of Canada Flora of Canada Flora of the United States Native grasses of California Flora of Oregon Flora of Washington (state) Flora of Colorado Flora of Nevada Flora of Utah Flora without expected TNC conservation status {{Pooideae-stub