Calamagrostis rubescens

Calamagrostis rubescens
	Calamagrostis rubescens near Peshastin, Chelan County Washington
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Pooideae
Genus:	Calamagrostis
Species:	C. rubescens
Binomial name
	Calamagrostis rubescens; Buckley

Calamagrostis rubescens is a species of grass known by the common name pinegrass.

Distribution

It is native to western North America, including Canada from British Columbia to Manitoba and the United States from California to Colorado.^[1] It can be found in several types of habitat, including forest and woodlands.^[2]

Description

It is a perennial bunchgrass growing erect to heights between 60 centimeters and one meter. The inflorescence is a dense bunch or open array of spikelets. Each spikelet is about half a centimeter long and has a bent or twisted awn 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

References

^ Petersen, Terry D. (1988). "Effects of Interference from Calamagrostis rubescens on Size Distribution in Stands of Pinus ponderosa". Journal of Applied Ecology. 25 (1): 265–272. Bibcode:1988JApEc..25..265P. doi:10.2307/2403624. ISSN 0021-8901. JSTOR 2403624.
^ Marr, Kendrick L.; Hebda, Richard J.; Zamluk, Elizabeth Anne (1 October 2011). "Morphological Analysis and Phytogeography of Native Calamagrostis (Poaceae) from British Columbia, Canada and Adjacent Regions". Madroño. 58 (4): 214–233. doi:10.3120/0024-9637-58.4.214. ISSN 0024-9637.

External links

Media related to Calamagrostis rubescens at Wikimedia Commons
Jepson Manual Treatment
USDA Plants Profile
Photo gallery

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[1] Petersen, Terry D. (1988). "Effects of Interference from Calamagrostis rubescens on Size Distribution in Stands of Pinus ponderosa". Journal of Applied Ecology. 25 (1): 265–272. Bibcode:1988JApEc..25..265P. doi:10.2307/2403624. ISSN 0021-8901. JSTOR 2403624.

[2] Marr, Kendrick L.; Hebda, Richard J.; Zamluk, Elizabeth Anne (1 October 2011). "Morphological Analysis and Phytogeography of Native Calamagrostis (Poaceae) from British Columbia, Canada and Adjacent Regions". Madroño. 58 (4): 214–233. doi:10.3120/0024-9637-58.4.214. ISSN 0024-9637.

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