ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Agrostis hyemalis
 
 
 CLASS:    MONOCOTYLEDENAE
 ORDER:    CYPERALES
 FAMILY:   POACEAE
 SCIENTIFIC NAME:  Agrostis hyemalis
 AUTHORITY:  (Walt.) BSP.
 
 COMMON NAMES:
    HAIR GRASS
    TICKLE GRASS
    WINTER BENT GRASS
 
 SYNONOMY:   None
 
 PLANTS CODE: AGHY
 
 NATURAL COMMUNITIES:
     PRAIRIE
       TYPICAL PRAIRIE
       SAND PRAIRIE
       GRAVEL PRAIRIE
       HILL PRAIRIE
     CULTURAL
       SUCCESSIONAL FIELD
         ABANDONED CROPLAND
         ABANDONED FORAGELAND
       RESTORATION
 
 
 SAF FOREST COVER TYPE:
     NO
 
 
 NATURAL DIVISION:
     Rock River Hill Country
        Freeport
     Northeastern Morainal
        Winnebago
     Grand Prairie
        Grand Prairie
        Springfield
     Western Forest Prairie
        Galesburg
     Southern Till Plain
        Effingham Plain
        Mt. Vernon Hill Country
     Shawnee Hills
        Greater Shawnee Hills
     Coastal Plain
        Cretaceous Hills
 
 COUNTIES:
   ALEXANDER       BOND            BOONE           CALHOUN         CASS
   CHAMPAIGN       CHRISTIAN       CLAY            COLES           COOK
   CRAWFORD        CUMBERLAND      DEKALB          DEWITT          DOUGLAS
   DUPAGE          EFFINGHAM       FAYETTE         FRANKLIN        FULTON
   GREENE          GRUNDY          HAMILTON        HANCOCK         HENRY
   IROQUOIS        JACKSON         JASPER          JEFFERSON       JERSEY
   JO DAVIESS      JOHNSON         KANE            KANKAKEE        KENDALL
   KNOX            LAKE            LASALLE         LEE             LIVINGSTON
   LOGAN           MCDONOUGH       MCHENRY         MCLEAN          MACON
   MACOUPIN        MADISON         MARION          MARSHALL        MASON
   MASSAC          MENARD          MONTGOMERY      MORGAN          OGLE
   PEORIA          PERRY           PIATT           PIKE            POPE
   PULASKI         RANDOLPH        RICHLAND        ST. CLAIR       SALINE
   SANGAMON        SCHUYLER        SCOTT           SHELBY          STARK
   STEPHENSON      TAZEWELL        UNION           VERMILION       WABASH
   WARREN          WHITE           WHITESIDE       WILL            WILLIAMSON
   WINNEBAGO
 
 GROWTH FORM:  Monocot
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Adventitious   (fibrous)
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire
    LEAF VENATION:  Parallel
    LEAF SHAPE:     Linear
    INFLORESCENCE:   Panicle
    FLOWER MEROUS:  3
    FLOWER STRUCTURE:   Complete
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   Grain
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     This is the smallest lemma of any Agrostis in Illinois; is tufted. When
     mature, entire inflorescence breaks from the plant and is carried
     away by the wind as in the manner of tumbleweeds; size varies
     greatly with growing conditions.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Common
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Grasslike
     LIFE CYCLE:   Perennial
     REPRODUCTION:   Sexual
     FLOWERING PERIOD:
         MONTH BEGINNING-      3         MONTH END-      6
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C3
     SEX:      Perfect
 
 ECODISTRIBUTION COMMENTS:
     Species is distributed in open woods, meadows, sandy soil.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:
     MAJOR DISPERSAL AGENTS:   GRAVITY   WIND
 
 
 FUNCTIONAL DATA COMMENTS:
     Panicles break off and blow around in the wind, thereby dispersing
     the grains (Rabinowitz and Rapp, 1979).
 HUMAN RELATIONSHIP DATA:    No data entered
 
 WILDLIFE AND LIVESTOCK INFORMATION:   No data entered
 
 REVEGETATION PLANTINGS:    No data entered
 
 
 REFERENCES:
Steyermark, J. A.  1963.  Flora of Missouri.  Iowa State University Press, Ames.
     1725 pp.
Swink, F., and G. S. Wilhelm.  1979.  Plants of the Chicago region.  Third ed.
     The Morton Arboretum, Lisle, Illinois.  922 pp.
Mohlenbrock, R. H.  1967-continuing.  The illustrated flora of Illinois.
     Southern Illinois University Press, Carbondale.
Downton, W. J. S.  1975.  The occurrence of C4 photosynthesis among plants.
     Photosynthetica 9(1): 96-105.
 
 OTHER REFERENCES:
     Rabinowitz, D., and J.K. Rapp. 1979. Dual dispersal modes in
          hairgrass, Agrostis hiemalis (Walt.) B.S.P. (Gramineae).
          Torrey Botanical Club Bulletin 106:32-36.
 
 END OF DATA FOR SPECIES  Agrostis hyemalis
 
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 ILPIN was developed by Louis Iverson*, with data compiled by David Ketzner and Jeanne Karnes
 Illinois Natural History Survey, 607 E. Peabody Dr., Champaign, IL 61820
     *currently employed by USDA Forest Service, 359 Main Rd., Delaware, OH 43015