Calamagrostis purpurascens, is a perennial grass commonly known as purple reedgrass, purple pinegrass, or alpine reedgrass.[26]
Description
Calamagrostis purpurascens is a large, clump forming, perennial grass; growing 30-80 cm (12-31 in.) tall.[27] It grows from short rhizomes and has dense, often purpled tinted flower heads that are 4 to 13 cm (1.6 to 5.1 in.) long. It has one flowered spikelets, two subequal glumes, and lemma with a dorsal awn. The awn is longer than the glum and sharply bent, and longer than the tip of the spikelet. Flowering stems have typically one or two leaves.[28]
Further south, C. purpurascens is also known in
Chile, where it was recorded by
Rodolfo Amando Philippi in 1860. Philippi gave it the name Deyeuxia robusta, now relegated to
synonymy.[24]
Calamagrostis purpurascens grows in dry mountainous zones, from high up on the
foothills to close to the snow-line, often taking root in gaps in the
talus, where few other plants can grow.[27] It is an arctic-alpine species with disjunct boreal populations in eastern North America.[28] In Minnesota it is an endangered species found growing in the north eastern part of the state in the coniferous region in
Cook county where it is found on tall north facing cliffs composed of
slate and
diabase; these locations are cool, moist, and lack heavy competition from other plant species.[28][29]
^S. G. Aiken; L. L. Consaul; M. J. Dallwitz. (December 10, 2001).
"Calamagrostis purpurascens R.Br". Poaceae of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. Archived from
the original on June 5, 2011. Retrieved August 12, 2010.
^Arundo purpurascens was published in Mantissa in Volumen Tertium. ... (Schultes & Schultes f.) 603. 1827.
"Plant Name Details for Arundo purpurascens". IPNI. Retrieved August 12, 2010.
^C. arctica was published in Grasses of the Southwest. Plates and Descriptions of the Grasses of the Desert Region of Western Texas, New Mexico, Arizona and Southern California, 2, pt. 2: no. 55. 1892. Washington, DC.
"Plant Name Details for Calamagrostis arctica". IPNI. Retrieved August 13, 2010. Distribution:
Alaska (St. Paul Island)
^C. arundinacea f. purpurascens was published in Flora Arctica Containing a Description of the Flowering Plants and Ferns, found in the Arctic Regions ... 1: 103. 1902.
"Plant Name Details for Calamagrostis arundinacea f. purpurascens". IPNI. Retrieved August 13, 2010.
^C. arundinacea var. purpurascens was published in Meddelelser om Gronland, af Kommissionen for Ledelsen af de Geologiske og Geografiske Undersogelser i Gronland, 47: 261. 1910. Copenehagen.
"Plant Name Details for Calamagrostis arundinacea var. purpurascens". IPNI. Retrieved August 13, 2010.
^C. caespitosa was published in Botanicheskie Materialy Gerbariya Botanicheskogo Instituta Imeni V. L. Komarova Akademii Nauk S. S. S. R. Leningrad, 13: 54. 1950. Leningrad.
"Plant Name Details for Calamagrostis caespitosa". IPNI. Retrieved August 13, 2010.
^C. lepageana was published in Rhodora; Journal of the New England Botanical Club, 46: 303, tab. 837. 1944. Cambridge, MA.
"Plant Name Details for Calamagrostis lepageana". IPNI. Retrieved August 13, 2010. Distribution:
Quebec
^C. purpurascens var. arctica was published in Bulletin, Division of Agrostology United States Department of Agriculture, 11: 19. 1898.
"Name-Calamagrostis purpurascens var. arctica (Vasey) Kearney". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved August 13, 2010.
^C. purpurascens var. ophitidis was published in Leaflets of Western Botany, 4: 246. 1946. San Francisco.
"Plant Name Details for Calamagrostis purpurascens var. ophitidis". IPNI. Retrieved August 13, 2010. Distribution: California (Southwestern U.S.A., Northern America)
^C. sylvatica var. americana was published in Contributions from the United States National Herbarium. Smithsonian Institution 3: 83. 1892.
"Plant Name Details for Calamagrostis sylvatica var. americana". IPNI. Retrieved August 13, 2010. Distribution: British America and western United States
^C. sylvatica var. purpurascens was published in Contributions from the United States National Herbarium. Smithsonian Institution, 3(1): 83. 1892.
"Name-Calamagrostis sylvatica var. purpurascens Thurb. ex Vasey". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved August 13, 2010.
^C. yukonensis was published in Bulletin of the New York Botanical Garden 2: 154. 1901.
"Plant Name Details for Calamagrostis yukonensis". IPNI. Retrieved August 13, 2010. Distribution: Alaska (Subarctic America, Northern America)
^Deschampsia congestiformis was published in Rhodora; Journal of the New England Botanical Club, 45: 414. 1943. Cambridge, MA.
"Plant Name Details for Deschampsia congestiformis". IPNI. Retrieved August 13, 2010. Distribution: Montana (Northwestern U.S.A., Northern America)
^
abDeyeuxia robusta was published in Florula Atacamensis seu Enumeriatio ... 54. 1860.
"Name-Deyeuxia robusta Phil". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved August 13, 2010. Locality:
Chile:
Vallem Zorras
^Trisetum sesquiflorum was published in Mémoires de l'Académie Impériale des Sciences de Saint-Pétersbourg. Sixième Série. Sciences Mathématiques, Physiques et Naturelles. Seconde Partie: Sciences Naturelles 4,2(1): 14. 1836.
"Name-Trisetum sesquiflorum Trin". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved August 13, 2010. Locality:
Unalashka
^
abTesky, Julie L. (1992).
"Calamagrostis purpurascens". Fire Effects Information System (online). Rocky Mountain Research Station, Fire Sciences Laboratory (Producer): U.S.D.A; Forest Service. Retrieved August 12, 2010.