Elymus americanus

• Interesting Facts
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Description

Genus Elymus

Plants perennial , usually tufted , usually without, rarely with, rhizomes. Culms usually erect . Leaf sheath of cauline leaves split almost to base ; auricles present or absent; leaf blade flat or rolled. Spike erect to nodding . Spikelets 1 or 2(4) per node, sessile, rarely very shortly pedicellate , appressed to rachis, clearly laterally compressed , usually all similar, with 210 or more florets ; rachis tough. Glumes opposite or side-by-side, linear-lanceolate to lanceolate-ovate, firmly membranous to leathery, 19(11) -veined, not keeled , apex obtuse to shortly awned ; veins ± raised. Lemma lanceolate-oblong, rounded abaxially, 5-veined, ± pubescent , apex obtuse or acute to awned, rarely toothed ; veins connivent at apex; awn erect or reflexed . Palea shorter than or equaling lemma, apex retuse , subrounded, or acute. Caryopsis usually adherent to lemma and palea. x = 7.

About 170 species:temperate regions of both hemispheres, mainly in Asia; 88 species (62 endemic) in China.

The genus Roegneria should be referred to Elymus because of their many common characters, e.g. , plants usually tufted; spikelets usually all similar, 1 per node; lemma lanceolate-oblong, rounded abaxially, 5-veined, veins connivent at apex.[1]

Taxonomy

Similar Species

Members of the genus Elymus

ZipcodeZoo has pages for 85 species, subspecies, varieties, forms, and cultivars in this genus:

E. alaskanus alaskanus (Alaskan Wheatgrass) · E. alaskanus latiglumis (Alaskan Wheatgrass) · E. alaskanus subsp. latiglumis (Alaskan Wheatgrass) · E. albicans (Montana Wheatgrass) · E. arizonicus (Arizona Wheatgrass) · E. bakeri (Baker's Wheatgrass) · E. calderi (Yukon Wheatgrass) · E. californicus (California Bottlebrush Grass) · E. canadensis (Canada Wild Rye) · E. canadensis var. canadensis (Canada Wildrye) · E. caninus (Bearded Wheatgrass) · E. ciliaris (Wildrye) · E. dahuricus (Dahurian Wild Rye) · E. diversiglumis (Diverseglume Wildrye) · E. dorei (Dore's Wildrye) · E. elymoides brevifolius (Bottle-Brush Squirrel-Tail) · E. elymoides hordeoides (Bottlebrush Squirreltail) · E. elymoides subsp. brevifolius (Squirreltail) · E. elymoides subsp. californicus (Squirreltail) · E. elymoides subsp. hordeoides (Desert Squirreltail) · E. europaeus (Wood-Barley) · E. glaucus (Blue Wild Rye) · E. glaucus virescens (Blue Wild Rye) · E. glaucus subsp. jepsonii (Jepson's Blue Wildrye) · E. glaucus subsp. virescens (Blue Wildrye) · E. gmelinii (Wildrye) · E. hanseni (Hansen Squirreltail) · E. hansenii (Hansen Squirreltail) · E. hirsutus (Alaska Wild-Rye) · E. hoffmannii (Rs Wheatgrass) · E. hyperarcticus (Tundra Wildrye) · E. hystrix (Bottle-Brush Grass) · E. hystrix var. bigeloviana (Bottlebrush Grass) · E. hystrix var. hystrix (Eastern Bottle-Brush Grass) · E. interruptus (Texas Wildrye) · E. kronokensis (Arctic Wheatgrass) · E. kronokensis subsp. subalpinus (Northern Wheatgrass) · E. lanceolatus (Streambank Wheatgrass) · E. lanceolatus lanceolatus (Streambank Wheatgrass) · E. lanceolatus psammophilus (Streambank Wheatgrass) · E. lanceolatus subsp. psammophilus (Streambank Wheatgrass) · E. latiglumis (Alaskan Wheatgrass) · E. macrourus (Thickspike Wheatgrass) · E. magellanicus (Blue Lyme Grass) · E. maltei (Malt Wildrye) · E. mossii (Moss' Wildrye) · E. multisetus (Big Squirrel-Tail) · E. palmerensis (Palmer's Wildrye) · E. pendulina (Wildrye) · E. pinaloensis (Pinalo Wildrye) · E. pseudorepens (Creeping Wildrye) · E. repens (Couchgrass) · E. repens repens (Couch-Grass) · E. riparius (River Wild-Rye) · E. saundersii (Saunder Wildrye) · E. scaber (Common Wheat-Grass) · E. scribneri (Schribner Wheatgrass) · E. semicostatum (Drooping Wild Rye) · E. sibiricus (Siberian Wild-Rye) · E. sierrae (Sierra Wildrye) · E. stebbinsii (Parish Wheatgrass) · E. stebbinsii stebbinsii (Parish Wheatgrass) · E. submuticus (Virginia Wildrye) · E. subsecundus (Bearded Wheatgrass) · E. svensonii (Svenson's Wild-Rye) · E. tangutorum (Wildrye) · E. trachycaulus (Slender Wheatgrass) · E. trachycaulus subsecundus (Slender Wheatgrass) · E. trachycaulus trachycaulus (Slender Wheatgrass) · E. trachycaulus subsp. subsecundus (Slender Wheatgrass) · E. villosus (Hairy Wild Rye) · E. virginicus (Virginia Wild Rye) · E. virginicus var. halophilus (Terrell Grass) · E. virginicus var. virginicus (Virginia Wild Rye) · E. vulpinus (Rydberg's Wildrye) · E. wawawaiensis (Snake River Wheatgrass) · E. wiegandii (Wiegand's Wild Rye) · E. x dorei (Dore's Wildrye) · E. x hansenii (Hansen Squirreltail) · E. x maltei (Malt Wildrye) · E. x mossii (Moss' Wildrye) · E. x palmerensis (Palmer's Wildrye) · E. x pinaloensis (Pinalo Wildrye) · E. x pseudorepens (Quackgrass) · E. x saundersii (Saunders' Wheatgrass)

More Info

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Further Reading

• A preliminary catalogue of the flora of Vancouver and Queen Charlotte Islands. Victoria, B.C., Printed by W. H. Cullin, 1921. url p. 16.
• American plants. .. [Descriptions, bibliographical notes, synonymy, and other information, comp. from many sources] Charles Russell Orcutt, editor. San Diego, Calif., [1907]-1910. url p. 441.
• An illustrated flora of the northern United States, Canada and the British possessions: from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian / by Nathaniel Lord Britton and Hon. Addison Brown. New York: C. Scribner's sons, 1913. url p. 289.
• Annual report / Albany: University of the State of New York, 1902-1918. url p. 250, p. 83.
• Bulletin / U.S. Department of Agriculture, Division of Vegetable Physiology and Pathology. Washington: G.P.O., 1896-1901. url p. 43.
• Contents and index of the reports of the State entomologist of Illinois. Stephen A. Forbes. [Urbana?]: The State, 1909. url p. 77.
• Contributions from the United States National Herbarium 19 1915 Washington, D.C.: Smithsonian Institution Press, 1890- url p. 109, p. 281, p. 289, p. 89.
• Experiment station record. Washington: G.P.O., 1889-1946. url p. 804.
• Flora of New Mexico / by E.O. Wooton and Paul C. Standley. Washington: G.P.O., 1915. url p. 109.
• Flora of New Mexico. By E.O. Wooton and Paul C. Standley. WashingtonGovt. Print. Off.1915 url p. 109.
• Flora of the state of Washington / by Charles V. Piper. Washington: G.P.O., 1906 url p. 151.
• History of Pasadena, comprising an account of the native Indian, Pasadena, Cal., Pasadena history company, 1895. url p. 615.
• Injurious and beneficial insects of California. / By E. O. Essig. Sacramento, California state printing office, 1915 url p. 322, p. 322.
• Journal of economic entomology. [College Park, Md., etc.]Entomological Society of America [etc.] url p. 459, p. 479.
• Manual of the grasses of the United States / by A.S. Hitchcock. Washington: U.S. G.P.O., 1935. url p. 843.
• Minnesota botanical studies. Minneapolis, Geological and Natural History Survey of Minnesota. url p. 112.
• Museum bulletin / Albany, N.Y.: University of the State of New York, 1908-1916. url p. 83, p. 90.
• Proceedings of the Entomological Society of Washington. Washington, etc.: Entomological Society of Washington url p. 44, p. 51.
• Proceedings of the United States National Museum. Washington: Smithsonian Institution Press, [etc.] url p. 460.
• Report of the State Entomologist on the noxious and beneficial insects of the state of Illinois. [Springfield, Ill.?]: State Entomologist, [1876?]-1916. url , p. 61.
• Reports of observations and experiments in the practical work of the Division, made under the direction of the Entomologist. Washington, U.S. G.P.O., 1883-1894. url p. 93.
• Reports of the Director. .. / Experimental Farms. Ottawa: Experimental Farms, 1888-1916. url p. 187, p. 326.
• Technical series. Washington, Govt. print. off., 1895-1915. url p. 15.
• The naturalisation of animals & plants in New Zealand, by Geo. M. Thomson. Cambridge [Eng.]: The University Press, 1922. url p. 312.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.

Identifiers

• Biodiversity Heritage Library NamebankID: 3410275
• Global Biodiversity Information Facility Taxonkey: 15755189
• Globally Unique Identifier: urn:lsid:ipni.org:names:400149-1
• Zipcode Zoo Species Identifier: 3626027

Footnotes

1. "Elymus". in Flora of China Vol. 22 Page 1, 386, 387, 400. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.