ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Equisetum X trachyodon
 
 
 CLASS:    EQUISETOPSIDA
 ORDER:    EQUISETALES
 FAMILY:   EQUISETACEAE
 SCIENTIFIC NAME:  Equisetum X trachyodon
 AUTHORITY:  A.Br.
 
 COMMON NAMES:
    HORSETAIL
 
 SYNONOMY:
     Equisetum variegatum Schleich. var. jesupi A. A. Eaton
 
 PLANTS CODE: EQTR
 
 NATURAL COMMUNITIES:
     PRIMARY
       LAKE SHORE
 
 SAF FOREST COVER TYPE:  UNAVAILABLE
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   COOK            MASON
 
 GROWTH FORM:  Fern-allies
 
 TAXONOMY COMMENTS:
     This is considered a hybrid between E. variegatum and E. hyemale.
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Adventitious   (fibrous)   (rhizomes)
    LEAF ARRANGEMENT:    Whorled
    LEAF TYPE:   Simple
    LEAF SHAPE:       Other
    INFLORESCENCE:           No
    FRUIT:   No
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     Stems are evergreen, unbranched; leaves are reduced to a whorl of
     scales with persistent teeth.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Rare
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Perennial
     REPRODUCTION:   Vegetative
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C3
     SEX:      Unisexual   -dioecious
 
 BIOLOGIC COMMENTS:
     Stems are evergreen.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:
     SHOWY FLOWERS:  NO
 
 WILDLIFE AND LIVESTOCK INFORMATION:   No data entered
 
 REVEGETATION PLANTINGS:    No data entered
 
 
 REFERENCES:
Fernald, M. L.  1950.  Gray's manual of botany.  8th ed.  American Book Co.,
     New York.  1632 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.
 
 END OF DATA FOR SPECIES  Equisetum X trachyodon
 
 ------------------------------------------------------------------------
 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