New York Natural Heritage Program
Creeping St. John's-wort
Hypericum adpressum Raf. ex W. Bart.
Dicots
Links
Best Identification Reference
Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

Other References
Clemants, Steven and Carol Gracie. 2006. Wildflowers in the Field and Forest. A Field Guide to the Northeastern United States. Oxford University Press, New York, NY. 445 pp.
Crow, Garrett E. and C. Barre Hellquist. 2000. Aquatic and Wetland Plants of Northeastern North America: A revised and enlarged edition of Norman C. Fassett's a Manual of Aquatic Plants. Volume One: Pteridophytes, Gymnosperms, and Angiosperms: Dicotyledons. The University of Wisconsin Press. Madison, Wisconsin. 536 Pages.
Enser, Richard W. 2000. Hypericum adpressum Barton, Creeping St. John's-wort. New England Plant Conservation Program Conservation and Research Plan. New England Wild Flower Society, Framingham, MA 01701.
Fernald, M.L. 1950. Gray's manual of botany. 8th edition. D. Van Nostrand, New York. 1632 pp.
Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.
Keys, Jr.,J.; Carpenter, C.; Hooks, S.; Koenig, F.; McNab, W.H.; Russell, W.;Smith, M.L. 1995. Ecological units of the eastern United States - first approximation (cd-rom), Atlanta, GA: U.S. Department of Agriculture, Forest Service. GIS coverage in ARCINFO format, selected imagery, and map unit tables.
NatureServe. 2005. NatureServe Central Databases. Arlington, Virginia. USA
New York Natural Heritage Program. 2010. Biotics database. New York Natural Heritage Program. New York State Department of Environmental Conservation. Albany, NY.
Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research http://www.fccdr.usf.edu/. University of South Florida http://www.usf.edu/]. New York Flora Association http://wwws.nyflora.org/, Albany, New York

Acknowledgements

Funding from the NYSDEC Hudson River Estuary Program made the initial development of these guides possible.

Additional support has been provided by

Website architect: Andrew Blick.
Modifications and updates: David Marston and Matthew Buff.

Global data are provided by NatureServe and its Natural Heritage member programs, a leading source of information about rare and endangered species, and threatened ecosystems.

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This guide was authored by: Stephen M. Young
Information for this guide was last updated on: 22-Aug-2017