ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Rorippa islandica fernaldiana
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    CAPPARALES
 FAMILY:   BRASSICACEAE
 SCIENTIFIC NAME:  Rorippa islandica fernaldiana
 AUTHORITY:  (Oeder) Borbas
 SUBSPECIFIC AUTHORITY: Butt. & Abbe
 
 COMMON NAMES:
    MARSH YELLOW CRESS
 
 SYNONOMY:   None
 
 PLANTS CODE: ROISF2
 
 NATURAL COMMUNITIES:
     FOREST
       FLOODPLAIN FOREST
         WET
     WETLAND
       BORDER OF LAKE
     CULTURAL
       SUCCESSIONAL FIELD
 
 SAF FOREST COVER TYPE:  UNAVAILABLE
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   ALEXANDER       BOND            BOONE           BUREAU          CALHOUN
   CASS            CHAMPAIGN       CLARK           CLAY            COLES
   COOK            CRAWFORD        CUMBERLAND      DEKALB          DOUGLAS
   DUPAGE          EDGAR           EDWARDS         FAYETTE         FORD
   FULTON          GREENE          GRUNDY          HAMILTON        HANCOCK
   HARDIN          HENDERSON       HENRY           IROQUOIS        JACKSON
   JASPER          JEFFERSON       JERSEY          JO DAVIESS      JOHNSON
   KANE            KANKAKEE        KENDALL         LAKE            LASALLE
   LAWRENCE        LEE             LIVINGSTON      MCDONOUGH       MCHENRY
   MACON           MACOUPIN        MADISON         MARION          MARSHALL
   MASON           MASSAC          MENARD          MERCER          MONROE
   MONTGOMERY      MORGAN          MOULTRIE        PEORIA          PERRY
   PIATT           PIKE            POPE            PULASKI         RANDOLPH
   RICHLAND        ROCK ISLAND     ST. CLAIR       SANGAMON        SCHUYLER
   SCOTT           STARK           STEPHENSON      UNION           VERMILION
   WABASH          WHITESIDE       WILL            WINNEBAGO       WOODFORD
 
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Primary
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Dentate
    LEAF VENATION:  Pinnate
    LEAF SHAPE:     Oblong   Oblanceolate
    INFLORESCENCE:   Raceme
    FLOWER MEROUS:  4
    FLOWER STRUCTURE:   Complete   Regular
    FLOWER COLOR:   Yellow
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   SILIQUE
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     Stems and leaves are glabrous.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Common
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Biennial   Annual
     REPRODUCTION:   Sexual
     FLOWERING PERIOD:
         MONTH BEGINNING-      5         MONTH END-     11
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C3
     SEX:      Perfect
 
 ECODISTRIBUTION COMMENTS:
     Species is distributed along muddy shores; ditches; along railroads.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:
     SHOWY FLOWERS:  YES      AMOUNT:  Low
 
 
 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.
Gleason, H. A., and A. Cronquist.  1963.  Manual of vascular plants of north-
     eastern United States and adjacent Canada.  Van Nostrand Reinhold Co.,
     New York.  810 pp.
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  Rorippa islandica fernaldiana
 
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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