Overview
Interesting Facts
Common Names
Common Names in English:
Hooker's Alpine Oat Grass, Spike-Oat, Spikeoat
Description
Physical Description
Species Helictotrichon hookeri
Perennial
, rhizomes very short or absent, forming mats. Culms
tufted
,
erect
, 20-70 cm tall, usually 2-noded. Leaf sheaths
of cauline leaves
closed
for less than 1/4 of length
; leaf blades flat or folded, 10-25
cm, 2-5 mm wide, smooth
or scabrid
, margins
thick, white, base
straight,
apex subacute
; ligule lanceolate, 3-6 mm.
Panicle contracted
, sometimes
dense, 4-15 cm; branches usually paired
, erect or ascending
, scabrid,
bearing 1-4 spikelets
. Spikelets 1.1-1.7 cm, green or brown, florets
3-6; rachilla hairs
1-2 mm; glumes
membranous, 3(-5) -veined, lower
glume 9-12 mm, upper glume 10-13 mm; lemmas leathery, hyaline
above
awn
insertion
, lowest 10-13 mm, asperulous
, apex 2-toothed; awn 1.2-1.5
cm, geniculate
, column twisted, flat; palea keels minutely ciliolate
.
Anthers
ca.
4 mm. Fl.
and fr. Jun-Sep. [source]
This is a variable species with higher-altitude forms distinguishable
at subspecific rank. These forms correspond to plants
from uplands
in W North America, from where the species was first described. [source]
Habitat
Hill slopes in steppe , forest margins , moist meadows in high mountains; 100-3500 m [1].
Taxonomy
- Domain:
Eukaryota
(
)
- Whittaker & Margulis,1978
- eukaryotes
- Kingdom:
Plantae
()
- Haeckel, 1866
- Plants
- Subkingdom:
Viridaeplantae
()
- Cavalier-Smith, 1981
- Phylum:
Tracheophyta
()
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Subphylum:
Euphyllophytina
()
- (Auct.) Cavalier-Smith, 1998
- Infraphylum:
Angiospermae
()
- Auct.
- Class:
Spermatopsida
()
- Brongniart, 1843
- Subclass:
Commelinidae
()
- Takhtajan, 1967
- Superorder:
Juncanae
()
- Takhtajan, 1967
- Order:
Poales
()
- Small, 1903
- Family:
Gramineae
()
- A.L. de Jussieu, 1789, nom. cons., nom. alt.
- Subfamily:
Pooideae
()
- Tribe:
Aveneae
()
- Subtribe:
Aveninae
()
- Genus:
Helictotrichon
()
- Besser, in J.A. Schultes & J.H. Schultes, 1827
- Specific epithet:
hookeri
- (Scribn.) Henr.
- Botanical name: - Helictotrichon hookeri (Scribn.) Henr.
- Specific epithet:
hookeri
- (Scribn.) Henr.
- Genus:
Helictotrichon
(
- Subtribe:
Aveninae
(
- Tribe:
Aveneae
(
- Subfamily:
Pooideae
(
- Family:
Gramineae
(
- Order:
Poales
(
- Superorder:
Juncanae
(
- Subclass:
Commelinidae
(
- Class:
Spermatopsida
(
- Infraphylum:
Angiospermae
(
- Subphylum:
Euphyllophytina
(
- Phylum:
Tracheophyta
(
- Subkingdom:
Viridaeplantae
(
- Kingdom:
Plantae
(
Synonyms
Avenochloa hookeri (Scribn.) Holub • Avenula hookeri (Scribn.) Holub
Notes
Name
Status: Accepted Name
.
Last scrutiny: 15-Mar-2000
Similar Species
Members of the genus Helictotrichon
ZipcodeZoo has pages for 7 species, subspecies, varieties, forms, and cultivars in this genus:
H. dahuricum (Emperor Alpineoatgrass) · H. hookeri (Hooker's Alpine Oat Grass) · H. mortonianum (Alpine Oat) · H. pubescens (Downy Alpineoatgrass) · H. sempervirens (Blue Oat Grass) · H. sempervirens 'Saphirsprudel' (Sapphire Fountain Blue Oat Grass) · H. sempervirens 'Sapphire' (Blue Oat Grass)
More Info
- Search for Pictures: images.google.com
- Search for Scholarly Articles: Google Scholar
- Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
- Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books
Further Reading
- Budd's flora of the Canadian Prairie Provinces / [Ottawa]: Research Branch, Agriculture Canada, 1987. url p. 135.
- Plant species of special concern and plant associations of Sheridan County, Montana / Helena, Mont.: Montana Natural Heritage Program, 2000. url , .
- Sensitive plant species survey, Garfield and McCone Counties, Montana / prepared by Bonnie L. Heidel; prepared for Bureau of Land Management. Helena, MT: Montana Natural Heritage Program, [1994] url .
- Syllogeus. Ottawa, National Museum of Natural Sciences, 1972-1995. url p. 17, p. 23, p. 29, p. 31, p. 46, p. 61, p. 9.
- The Canadian field-naturalist. 75 1961 Ottawa, Ottawa Field-Naturalists' Club. url p. 112, p. 187, p. 216, p. 262, p. 270, p. 392, p. 431, p. 435, p. 45, p. 493, p. 527, p. 532, p. 532, p. 55, p. 64, p. 693, p. 697, p. 74.
- The Great Basin naturalist. 39 1979 Provo, Utah: M.L. Bean Life Science Museum, Brigham Young University, 1939-1999. url p. 281.
- Vegetation and flora of the Line Creek Plateau area, Carbon County, Montana / prepared by Peter Lesica and the Montana Natural Heritage Program; prepared for USDA Forest Service, Intermountain Research Station. Helena, MT: Montana Natural Heritage Program, [1993] url p. 24.
Notes
Contributors
- Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
- Global Biodiversity Information Facility. Accessed February 28, 2008. http://www.gbif.org Mediated distribution data from 2 providers.
- "Helictotrichon hookeri". in Flora of China Vol. 22 Page 317, 318. Published by Missouri Botanical Garden Press. Online at EFloras.org.
- Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.
- USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. URL (April 26, 2008)
- USDA, NRCS. 2005. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Data Sources
Accessed through GBIF Data Portal February 28, 2008:
- Canadian Museum of Nature: Canadian Museum of Nature Herbarium
- Natural History Museum, Vienna - Herbarium W: Herbarium W
- University of Alaska Museum of the North: University of Alaska Museum of the North Herbarium (ALA)
- University of Colorado Museum: Zoological specimens
- USDA PLANTS: USDA PLANTS Database
- Utah State University: USU-UTC Specimen Database
Identifiers
- Biodiversity Heritage Library NamebankID: 2667402
- Catalogue of Life Accepted Name Code: ITS-502934
- Globally Unique Identifier: urn:lsid:ipni.org:names:404583-1
- GRIN Nomen Number: 18808
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 502934
- MoBot NameID: 25511144
- Natural Heritage Network Species Identifier: PMPOA32040
- U.S.D.A. Plant Symbol: AVHO3
- Zipcode Zoo Species Identifier: 24479
Footnotes
- "Helictotrichon hookeri". in Flora of China Vol. 22 Page 317, 318. Missouri Botanical Garden Press. Online at EFloras.org. [back]
