ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Bartonia paniculata
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    GENTIANALES
 FAMILY:   GENTIANACEAE
 SCIENTIFIC NAME:  Bartonia paniculata
 AUTHORITY:  (Michx.) Muhl.
 
 COMMON NAMES:
    SCREWSTEM
 
 SYNONOMY:   None
 
 PLANTS CODE: BAPA2
 
 NATURAL COMMUNITIES:
     WETLAND
       SEEP & SPRING
         ACID GRAVEL SEEP
         SAND SEEP
       LISTED
         CHARACTERISTIC
     PRIMARY
       BLUFF
         CLIFF (ROCKY BLUFF)
           SANDSTONE
 
 
 SAF FOREST COVER TYPE:
     NO
 
 
 NATURAL DIVISION:
     Coastal Plain
        Cretaceous Hills
        listed
 
 COUNTIES:
   JOHNSON         POPE
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Primary
    LEAF ARRANGEMENT:   Alternate     Opposite
    LEAF TYPE:   Simple
    LEAF SHAPE:       Other
    INFLORESCENCE:   Panicle  Raceme
    FLOWER MEROUS:  4
    FLOWER STRUCTURE:   Complete   Regular
    FLOWER COLOR:   White
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   Capsule
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     Scale-like leaves;  sometimes twining.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 GEOGRAPHIC COMMENTS:
     Northern range limit.
 
 POPULATION DYNAMICS:
     STATE STATUS: Endangered-ST
     FEDERAL STATUS: Not listed
     COMMONNESS:  Rare
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Biennial   Annual
     REPRODUCTION:   Sexual
     FLOWERING PERIOD:
         MONTH BEGINNING-      8         MONTH END-      9
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C3
     SEX:      Perfect
 
 BIOLOGIC COMMENTS:
     Also Trophic Status:  saphrophytic
 
 ECODISTRIBUTION COMMENTS:
     Wet peat and sand with sphagnum moss.
 
 ENVIRONMENTAL RELATIONSHIPS:
     SOIL CHEMISTRY INDICATOR:   Acidic
     GROWTH OF SPECIES IN VARIOUS CONDITIONS:
          GRAVEL         No data entered    SAND           No data entered
          SANDY LOAM     No data entered    LOAM           No data entered
          CLAY LOAM      No data entered    CLAY           No data entered
          DENSE CLAY     No data entered    ORGANIC SOIL   Good
          NEUTRAL pH     No data entered    ACIDIC SOIL    Good
          EXTREMELY ACID No data entered    SALINE SOIL    No data entered
          SODIC SOIL     No data entered    SODIC-SALINE   No data entered
          ROCKY OUTCROPS Good               GENTLE SLOPES  Good
          MODERATE SLOPE Good               STEEP SLOPES   Good
     HABITAT:   Wet
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:
     SHOWY FLOWERS:  NO     LANDSCAPING:  NO
 
 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.
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.
Schwegman, J. E., G. D. Fell, M. Hutchison, G. Paulson, W. M. Shepherd, and
     J. White.  1973.  Comprehensive plan for the Illinois Nature Preserves
     System.  Part 2 - The Natural Divisions of Illinois.  Illinois Nature
     Preserves Commission, Springfield.  32 pp., plus map.
White, J., and M. H. Madany.  1978.  Classification of natural communities in
     Illinois.  Pages 309-405 in J. White, ed., Illinois natural areas
     inventory technical report.  Vol. 1.  Survey methods and results.
     Illinois Natural Areas Inventory, Urbana.
Porter, C. L.  1967.  Taxonomy of flowering plants.  W. H. Freeman and
     Company, San Francisco.  472 pp.
Gleason, H. A.  1952.  The new Britton and Brown illustrated flora of the
     northeastern United States and adjacent Canada.  3 vols.  The New York
     Botanical Garden, New York.
Sheviak, C. J.  1981.  Endangered and threatened plants.  Pages 70-179 in M.
     L. Bowles, V. E. Diersing, and J. E. Ebinger, eds., Endangered and
     threatened vertebrate animals and vascular plants of Illinois.  Illinois
     Department of Conservation, Springfield.
Downton, W. J. S.  1975.  The occurrence of C4 photosynthesis among plants.
     Photosynthetica 9(1): 96-105.
 
 END OF DATA FOR SPECIES  Bartonia paniculata
 
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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