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Vaccinium macrocarpon Aiton  
Family: Ericaceae
Large Cranberry, more...cranberry
Vaccinium macrocarpon image
Paul Rothrock
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Sam P. Vander Kloet in Flora of North America (vol. 8)
Plants often ascending, shoots 0.4-1.5 dm. Leaf blades glaucous abaxially, green adaxially, usually narrowly elliptic to elliptic, rarely oblong, 5-18 m 2-55 mm, margins entire, slightly revolute. Inflorescences in axils of leaflike bracts at base of current year´s shoots. Pedicels nodding, slender, 2-3 cm, bracteolate; bracteoles 2, greenish white, scalelike, 1-2 mm wide. Flowers: calyx lobes relatively small; corolla strongly reflexed at anthesis, white to pink; filaments hairy; anther tubules 1-2 mm. Berries red to pink, 9-14 mm diam., smooth. 2n = 24. Flowering late spring-early summer. Bogs, swamps, mires, wet shores and headlands; 0-1400 m; St. Pierre and Miquelon; B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Conn., Del., D.C., Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., Tenn., Vt., Va., Wash., W.Va., Wis.; introduced in Europe. Vaccinium macrocarpon is introduced and escaping elsewhere (British Columbia, Oregon, Washington) with respect to its normal range in eastern North America.

From Flora of Indiana (1940) by Charles C. Deam
In boggy and marshy places, usually associated with sphagnum. Formerly there were large areas of "cranberry marshes" in Indiana but now the species has become rare.

……

Indiana Coefficient of Conservatism: C = 10

Wetland Indicator Status: OBL

Vascular plants of NE US and adjacent Canada
Evergreen trailing shrub with very slender stems; lvs leathery, subsessile, elliptic-oblong, 5-15 mm (the largest usually > 1 cm), rounded at the tip, flat or scarcely revolute; fls 2-6 in a cluster, solitary in the axils of the reduced lower lvs of a normal branch; pedicels 1-3 cm; bracteoles above the middle of the pedicel, green, 2-4 נ1-2 mm; cor white to pink, 1 cm wide, deeply 4-cleft, the lobes strongly reflexed; styles 5-7 mm; fr red, 1-1.5 cm, tart; 2n=24. Bogs; Nf. to Man., s. to Va., O., and n. Ill., and locally in the mts. to N.C. and Tenn. June-Aug. (Oxycoccus m.)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Vaccinium macrocarpon
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Paul Rothrock
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Paul Rothrock
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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