ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Eleocharis verrucosa
 
 
 CLASS:    MONOCOTYLEDENAE
 ORDER:    CYPERALES
 FAMILY:   CYPERACEAE
 SCIENTIFIC NAME:  Eleocharis verrucosa
 AUTHORITY:  (Svens.) Harms
 
 COMMON NAMES:
    SLENDER SPIKE RUSH
 
 SYNONOMY:
     Eleocharis tenuis (Willd.) Schult. var. verrucosa (Svens.) Svens.
 
 PLANTS CODE: ELTEV
 
 NATURAL COMMUNITIES:
     FOREST
       UPLAND FOREST
         WET-MESIC
       FLOODPLAIN FOREST
         WET
       FLATWOODS
     PRAIRIE
       TYPICAL PRAIRIE
         WET
       SAND PRAIRIE
         WET
       DOLOMITE PRAIRIE
         WET
     WETLAND
       SEDGE MEADOW
       SEEP & SPRING
         ACID GRAVEL SEEP
       BORDER OF LAKE
     PRIMARY
       GLADE
       BLUFF
         CLIFF (ROCKY BLUFF)
     CULTURAL
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NO
 
 
 NATURAL DIVISION:
     Coastal Plain
        Cretaceous Hills
 
 COUNTIES:
   BOND            CASS            CHAMPAIGN       CHRISTIAN       CLARK
   CLAY            COLES           COOK            EDGAR           EDWARDS
   EFFINGHAM       FAYETTE         HAMILTON        HANCOCK         HENDERSON
   HENRY           JACKSON         JEFFERSON       KANKAKEE        LEE
   LIVINGSTON      MCDONOUGH       MACON           MACOUPIN        MARION
   MASON           MASSAC          MENARD          MONROE          PEORIA
   POPE            PULASKI         SALINE          SCOTT           SHELBY
   STARK           UNION           VERMILION       WABASH          WASHINGTON
   WAYNE           WILLIAMSON
 
 GROWTH FORM:  Monocot
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Adventitious   (rhizomes)
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire
    LEAF VENATION:  Parallel
    LEAF SHAPE:     Linear
    INFLORESCENCE:   Head
    FLOWER MEROUS:  3
    FLOWER STRUCTURE:   Complete   Regular
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   Achene
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     Versus all other Illinois Eleocharis, this species has: 1) 5 angled
     culm; 2) dark red or purple scales; 3) olivaceous-yellow
     achenes with reticulate surfaces. In younger stages, it is
     similar to E. compressa.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 GEOGRAPHIC COMMENTS:
     Species is found throughout most of Illinois, except apparently for some of the
     northernmost counties.
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Occasional
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Grasslike
     LIFE CYCLE:   Perennial
     REPRODUCTION:   Vegetative
     FLOWERING PERIOD:
         MONTH BEGINNING-      5         MONTH END-      9
     TROPHIC STATUS:  Autotrophic
     SEX:      Perfect
 
 ECODISTRIBUTION COMMENTS:
     Species is distributed in moist crevices on dry bluffs; prairie
     swales along railroads; roadside openings, ditches, and slough
     borders.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:    No data entered
 
 WILDLIFE AND LIVESTOCK INFORMATION:   No data entered
 
 REVEGETATION PLANTINGS:    No data entered
 
 
 REFERENCES:
Mohlenbrock, R. H., ed.  1975.  Guide to the vascular flora of Illinois.
     Southern Illinois University Press, Carbondale.  494 pp.
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.
 
 END OF DATA FOR SPECIES  Eleocharis verrucosa
 
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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