Culver's-root is a popular garden plant and available in many native plant nurseries in the Northeast. Its large size and showy spikes of white flowers and whorled leaves are a beautiful addition to an early-summer perennial garden, especially if you want to help feed the bees and bumblebees. There are a number of cultivars available now. The common name comes from a mysterious Dr. Culver (or Coulvert), an early pioneer physician who used it in his practice since it had many medicinal uses, beginning with Native Americans (Wikipedia contributors).
There are 16 verified occurrences. There are about 40 historical occurrences.
The short term trend is unknown, given that known populations have only been surveyed once.
The long term trend indicates a somewhat significant decline as the known populations have declined to 16 from the 40 historically documented. Additional survey efforts are needed is determine the overall trend for this species.
The known populations are threatened by increased mowing, along with habitat alteration and loss due to incompatible management or corridor, including driveway, improvements. The collection for medicinal uses may also threaten this plant. Other potential threats include loss of habitat through competition with invasive plant species and the loss of local native genotypes thorough interbreeding with cultivated varieties or non-local ecotypes.
Time mowing and other compatible habitat management efforts to occur during the growing season but outside the period of flowering and fruiting. Avoid the application of herbicides and repeated mowing during the growing season. Monitor populations for impacts from deer browse, habitat loss to competition from invasive species. and loss of habitat suitability due to excessive shading. Protect the populations from direct disturbance from trail expansion or development.
Additional survey work is needed both to locate new populations and at the historical records with specific locational information, to determine if those populations remain extant. Clear and consistent estimates of population size at extant populations is needed to help determine the trend of this species.
In New York the few known sites for Veronicastrum virginicum are forest edges, including along bike trails and driveways. It has been found on north or northwest-facing slopes as well as along the bottomlands of major rivers (New York Natural Heritage Program 2010). Prairie remants, fens, and meadows; river banks; deciduous woodlands (especially with oaks); and adjacent roadsides (Voss 1996). Moist and dry upland woods and prairies (Gleason and Cronquist 1991).
Populations are scattered throughout New York, south of the Adirondacks.
Culver's root is found from southeastern Manitoba and southwestern Ontario to Maine, south to Florida and Texas. It is known only from historical records in Louisiana, and North Dakota and the Maine populations are the result of introductions.
Culver's-root is a large, showy, herbaceous perennial. Plants have erect, unbranched stems reaching 80 cm to 2 m in height. Each stem has many whorls of 3 to 7 narrow, lanceolate, to lance-ovate, somewhat stiff, finely serrate leaves that are typically hairy on their underside. The inflorescence is a showy, branched, terminal raceme 6 to 15 cm long and densely packed with small (7 - 9 mm long) tube-like white or pink flowers with two exerted stamens.
Culver's root is most easily found when in flower, though fruiting and possibly even sterile specimens may also be identified. Flowering typically occurs from early July through late August.
When in flower or fruit Culver's root does not closely resemble any other plant species due to its unique combination of unbranched upright stems, height, slender spike-like racemes resembling an extended candelabra, and numerous sets of narrowly whorled leaves.
Veronicastrum typically flowers in late summer, and the fruits are present from late August into October.
The time of year you would expect to find Culver's Root flowering and fruiting in New York.
Veronicastrum virginicum (L.) Farw.
APSU Center for Field Biology and University of Tennessee Herbarium. 1999. October 6-last update. Atlas of Tennessee Vascular Plants. Online. Available: http://www.bio.utk.edu/botany/herbarium/vascular/atlas.html. Accessed 2000-Jan.
Amoroso, Jame. Personal communication. Botanist. North Carolina Heritage Program, NC Dept. of Environment, Health, & Natural Resources, Division of Parks And Recreation, Raleigh, NC.
Beckstrom-Sternberg, S.M., D.E. Moerman, and J.A. Duke. 1995. Medicinal plants of native America database. Online. Available: http://ars-genome.cornell.edu/cgi-bin/WebAce/webace?db=mpnad b. Accessed 2000, January 7.
Boyle, K., C. Eastman, and T. Mousseau. South Carolina plant atlas. Online. Available: http://cricket.biol.sc.edu/herb. Accessed 2000, January 7.
Brunet, David. Botanist, Louisiana Natural Heritage Program. Personal communication.
Cooperrider, T.S. 1995. The Dicotyledoneae of Ohio. Ohio State University Press, Columbus.
Cusick, A. Botanist, Ohio Natural Heritage Program. Personal communication.
Davidson, Campbell. Director, Morden Research Centre, Agriculture and Agri-Food Canada. Personal communication.
Fernald, M. L. 1950. Gray's manual of botany. 8th edition. Corrected printing (1970). D. Van Nostrand Company, New York. 1632 pp.
Ford, B. Personal communication. Professor and Curator of the University of Manitoba Herbarium, University of Manitoba, Winnipeg, MB.
Freeman, Craig. Personal communication. Botanist, Kansas Natural Features Inventory. Kansas Biological Survey, Lawrence, KS.
Gleason, H.A. 1952. The new Britton and Brown illustrated flora of the northeastern United States and adjacent Canada. 3 volumes. Hafner Press, New York. 1732 pp.
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.
Greenall, Jason. Botanist, Manitoba Department of Natural Resources. Personal communication.
Haines, A. and T.F. Vining. 1998. Flora of Maine, A Manual for Identification of Native and Naturalized Vascular Plants of Maine. V.F.Thomas Co., Bar Harbor, Maine.
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.
Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
Kindscher, K. 1992. Medicinal wild plants of the prairie: An ethnobotanical guide. University Press of Kansas, Lawrence.
Lakela, O. 1965. A Flora of Northeastern Minnesota. University of Minnesota Press, Minneapolis, Minnesota. 541 pp.
Looman, J. and K. Best. 1979. Budd's flora of the Canadian Praire Provinces. Agriculture Canada, Research Branch Publication 1662.
McAvoy, Bill. Personal communication. Botanist, Delaware Natural Heritage Program.
McGuffin, Michael. Personal communication. American Herbal Products Association, Silver Spring MD
McHale, Maureen. Natural Features Inventory Biologist, The Nature Conservancy/Missouri Department of Conservation. Personal communication.
Mitchell, Richard S. and Gordon C. Tucker. 1997. Revised Checklist of New York State Plants. Contributions to a Flora of New York State. Checklist IV. Bulletin No. 490. New York State Museum. Albany, NY. 400 pp.
Moerman, D.E. Native American Ethnobotany: a database of foods, drugs, dyes and fibers of Native American peoples, derived from plants. University of Michigan, Dearborn, MI. Online. Available: http://www.umd.umich.edu/cgi-bin/herb
Moorhead, William. Botanist, Connecticut Natural Diversity Database. Personal communication.
New York Natural Heritage Program. 2021. New York Natural Heritage Program Databases. Albany, NY.
Ode, David. Botanist/Ecologist, South Dakota Natural Heritage Database. Personal communication.
Oldham, Michael. Personal communication. Botanist, Ontario Natural Heritage Information Centre.
Popp, Robert. Heritage Coordinator/Botanist, Vermont Nongame and Natural Heritage. Personal communication.
Punter, C. Elizabeth. Special Projects Botanist, Manitoba Conservation Data Centre. Personal communication.
Radford, A.E., H.E. Ahles, and C.R. Bell. 1968. Manual of the vascular flora of the Carolinas. Univ. North Carolina Press, Chapel Hill, NC. 1183 pp.
Scoggan, H.J. 1978-1979. The flora of Canada: Parts 1-4. National Museums Canada, Ottawa. 1711 pp.
Smith, Tim. Personal communication. Botanist, Missouri Department of Conservation. Missouri Department of Conservation, Jefferson City, MO
Steyermark, J.A. 1963. Flora of Missouri. Iowa State Univ. Press, Ames. 1728 pp.
U.S. Department of Agriculture. 1997. July 16-last update. Western wetland flora: Field office guide to plant species. Online. Available: http://www.npwrc.usgs.gov/resource/othrdata/westflor/westflor.htm. Accessed 2000, January 7.
Voss, E.G. 1985. Michigan flora. Part II. Dicotyledons. Cranbrook Institute of Science and University of Michigan Herbarium. Ann Arbor, Michigan. 1212 pp.
Voss, E.G. 1996. Michigan Flora. Part III. Dicots (Pyrolaceae-Compositae). Cranbrook Institute of Science Bulletin 61 and Univ. Michigan Herbarium. Ann Arbor, Michigan. 622 pp.
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://newyork.plantatlas.usf.edu/, Albany, New York
Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (eds.) 1993. A Utah flora. 2nd edition. Brigham Young Univ., Provo, Utah. 986 pp.
Westad, Kristin. Wisconsin Natural Heritage Inventory. Personal communication.
Information for this guide was last updated on: January 6, 2016
Please cite this page as:
New York Natural Heritage Program. 2021. Online Conservation Guide for Veronicastrum virginicum. Available from: https://guides.nynhp.org/culvers-root/. Accessed September 24, 2021.