Equisetum x ferrissii Clute

Synonyms	Equisetum hyemale L. var. elatum (Engelm.) C.V. Morton Equisetum hyemale L. var. intermedium A.A. Eaton Equisetum intermedium (A.A. Eaton) Rydb.
Lower taxa	none
Origin	native
Growth habit	forb/herb
Habitat	open, moist watersides in sandy or clayey alluvium
Range	Sussex and Warren Counties; collected once (in 1926) in Gloucester County
Frequency	rare
Rank	not ranked
Status	none
Wetland status	US: FAC, FACW; Northeastern region: NI
Reproductive parts present	sporophylls, which bear sterile spores, present late spring to early summer
Comments	This plant is a sterile hybrid of Equisetum hyemale and E. laevigatum, a species not found in New Jersey. Reproduction is only vegetative. Stems are perennial and evergreen, with stomata in rows. The sheaths are enlarged upwards, with a black girdle at the base. The cones have rigid points.

Herbarium records: Academy of Natural Sciences (PH), Chrysler Herbarium at Rutgers University (CHRB), New York Botanical Garden (NY).
Flora of North America Editorial Committee. 1993. Flora of North America North of Mexico, vol. 2. Oxford University Press, New York, N.Y.
Hough, M.Y. 1983. New Jersey wild plants. Harmony Press, Harmony, N.J.
Montgomery, J.D., and D.E. Fairbrothers. 1985. New Jersey ferns and fern-allies. Rutgers University Press, New Brunswick, N.J.
NatureServe. 2006. NatureServe explorer: an online encyclopedia of life. Version 4.7. 10 March 2006. <http://www.natureserve.org/explorer>.
U.S. Department of Agriculture and Natural Resources Conservation Service. 2006. The PLANTS database. 29 August 2006. <http://plants.usda.gov>.

Species page by Gerry Moore and Janet Novak. © 2006 by the Flora of New Jersey Project. Last updated January 14, 2008.
Hosted by Rutgers, the State University of New Jersey in collaboration with the Chrysler Herbarium.

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