Agrostis hallii

• Overview
• Interesting Facts
• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Overview

Interesting Facts

Common Names

Description

Genus Agrostis

Annuals or perennials , tufted or sometimes with rhizomes or stolons. Leaf blades linear to filiform or setaceous , flat or rolled; ligule membranous. Inflorescence a panicle, open to contracted or spikelike. Spikelets with 1 floret, small, often gaping , without rachilla extension ; rachilla disarticulating above glumes ; glumes persistent , longer than floret, subequal or lower a little longer, membranous, 1-veined, apex subacute to acuminate; floret callus glabrous or shortly pilose ; lemma oblong to elliptic , thinner than glumes, often hyaline , 5-veined, rounded on back, glabrous or hairy , lateral veins sometimes excurrent, awnless or awned from back, apex truncate or toothed ; awn usually geniculate , sometimes weakly so or straight when short; palea shorter than lemma, sometimes very small. Stamens 3. Caryopsis oblong, sulcate on ventral side.

About 200 species:temperate and cold regions of the N hemisphere, also on tropical mountains; 25 species (eight endemic) in China.

The genus includes some good fodder and lawn plants .

Some species are superficially very similar, and correct identification depends on careful observation of spikelet details. It is also important to collect the basal parts to show the presence or absence of rhizomes and stolons. When the palea is long it is normally obvious, but small paleas usually adhere to the mature caryopsis and may appear to be absent. The presence or absence of awns is useful for identification, but awned species may have awnless variants , and vice versa, and the position of the awn on the lemma back can also be rather variable.[1]

Physical Description

Habitat

Typically found at an altitude of 0 to 1,751 meters (0 to 5,745 feet).[2]

Biology

Reproduction

Duration: Perennial

Growth

Temperature: Cold Hardiness: 7a, 7b, 8a, 8b, 9a, 9b. (map)

Taxonomy

Synonyms

Agrostis geminata Trin. • Agrostis hyemalis var. geminata (Trin.) A. S. Hitchc. • Agrostis hyemalis var. tenuis (Tuckerman) Gleason • Agrostis scabra septentrionalis< /i> (Fern.) A. & D. Löve • Agrostis scabra var. geminata (Trin.) Swallen • Agrostis scabra var. septentrionalis Fern.

Notes

Publishing author : Vasey Publication : Contr. U.S. Natl. Herb. iii. (1892) 74; et Grass . Pacif. Slope (1893) t.32.

Similar Species

Members of the genus Agrostis

ZipcodeZoo has pages for 51 species, subspecies, varieties, forms, and cultivars in this genus:

A. aequivalvis (Arctic Bentgrass) · A. alascana (Alaska Bentgrass) · A. alba var. major (Black Bent) · A. avenacea (Pacific Bentgrass) · A. blasdalei (Blasdale Bentgrass) · A. blasdalei var. blasdalei (Blasdale Bentgrass) · A. canina (Brown Bentgrass) · A. canina canina (Velvet Bent Grass) · A. capillaris (Brown-Top Bent) · A. capillaris var. aristata (Colonial Bent) · A. capillaris 'Jorvik' (Common Bent 'jorvik') · A. castellana (Bentgrass) · A. clavata (Clavate Bentgrass) · A. clivicola (Coastal Bluff Bentgrass) · A. clivicola var. clivicola (Coastal Bluff Bent Grass) · A. clivicola var. punta-reyesensis (Point Reyes Bentgrass) · A. densiflora (California Bentgrass) · A. elliottiana (Elliot Bentgrass) · A. exarata (Longtongue Bentgrass) · A. exarata var. exarata (Spike Bentgrass) · A. gigantea (Black Bent) · A. hallii (Hall's Bentgrass) · A. hallii var. hallii (Hall's Bentgrass) · A. hendersonii (Henderson's Bentgrass) · A. hooveri (Hoover Bentgrass) · A. howellii (Howell's Bentgrass) · A. humilis (Alpine Bentgrass) · A. hyemalis (Winter Bentgrass) · A. idahoensis (Idaho Bentgrass) · A. idahoensis var. idahoensis (Idaho Bentgrass) · A. longiligula var. longiligula (Longtongue Bentgrass) · A. mertensii (Arctic Bentgrass) · A. microphylla (Small-Leaf Bentgrass) · A. microphylla var. microphylla (Smallleaf Bentgrass) · A. muelleriana (He'u-Pueo) · A. nebulosa (Bentgrass) · A. oregonensis (Oregon Bentgrass) · A. pallens (Leafy Bentgrass) · A. perennans (Autumm Bentgrass) · A. pringlei (Pringle's Bentgrass) · A. rossiae (Mountain Bentgrass) · A. sandwicensis (Hawai'i Bentgrass) · A. scabra (Hairgrass) · A. scabra var. scabra (Rough Bentgrass) · A. stolonifera (Carpet Bentgrass) · A. stolonifera palustris (Creeping Bent Grass) · A. stolonifera var. stolonifera (Creeping Bentgrass) · A. tandilensis (Kennedy's Bentgrass) · A. variabilis (Mountain Bentgrass) · A. vinealis (Brown Bentgrass) · A. vinealis vinealis (Brown Bentgrass)

More Info

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• Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books

Further Reading

• A flora of California, by Willis Linn Jepson. San Francisco, Calif., Cunningham, Curtis & Welch, 1909- url p. 116, p. 116, p. 118, p. 118.
• An illustrated flora of the Pacific States: Washington, Oregon, and California. Stanford University, Stanford University Press, 1923-[60] url p. 148, p. 152, p. 155.
• Contributions from the United States National Herbarium 11 1906 Washington, D.C.: Smithsonian Institution Press, 1890- url p. 119, p. 55, p. 61, p. 62, p. 71, p. 75.
• Flora of the northwest coast, including the area west of the summit of the Cascade Mountains, from the forty-ninth parallel south to the Calapooia Mountains on the south border of Lane County, Oregon. Lancaster, Pa., Press of the New Era Printing Company, 1915. url , .
• Flora of the northwest coast: including the area west of the summit of the Cascade Mountains, from the forty-ninth parallel south to the Calapooia Mountains on the south border of Lane County, Oregon / by Charles V. Piper and R. Kent Beattie. Lancaster, Pa.: Press of the New era printing company, 1915. url p. 42, p. 43.
• Flora of the state of Washington / by Charles V. Piper. Washington: G.P.O., 1906 url p. 119, p. 121.
• Manual of the grasses of the United States / by A.S. Hitchcock. Washington: U.S. G.P.O., 1935. url p. 23, p. 333, p. 334.
• Point Lobos Reseerve; State Park, California. Interpretation of a primitive landscape. Sacramento, [State Print. Off., 1954] url p. 88.
• Proceedings of the California Academy of Sciences, 4th series. San Francisco, California Academy of Sciences. url p. 657.
• The genera of grasses of the United States: with special reference to the economic species / by A.S. Hitchcock. Washington, D.C.: U.S. Dept. of Agriculture, 1920. url p. 15.

Notes

Contributors

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

Data Sources

Accessed through GBIF Data Portal November 18, 2007:

• Berkeley Natural History Museums, University and Jepson Herbaria DiGIR provider
• Oregon State University, Vascular Plant Collection
• USDA PLANTS, USDA PLANTS Database
• Utah State University, USU-UTC Specimen Database

Identifiers

• Biodiversity Heritage Library NamebankID: 2660742
• Catalogue of Life Accepted Name Code: ITS-40415
• Global Biodiversity Information Facility Taxonkey: 13753256
• Globally Unique Identifier: urn:lsid:ipni.org:names:385817-1
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 40415
• International Plant Names Index (IPNI) ID: 7645-2
• Natural Heritage Network Species Identifier: PMPOA040J2
• U.S.D.A. Plant Symbol: AGHAP
• Zipcode Zoo Species Identifier: 20302

Footnotes

1. Sheng-lian Lu & Sylvia M. Phillips "Agrostis". in Flora of China Vol. 22 Page 317, 340, 348, 349, 351, 353, 358, 359, 361. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
2. Mean = 234.360 meters (768.898 feet), Standard Deviation = 379.880 based on 134 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]

©2004-2012 David Stang. All rights reserved.