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Vaccinium oxycoccos L.   (redirected from: Vaccinium microcarpum (Turcz. ex Rupr.) Schmalh.)
Go To Encyclopedia of Life...
Family: Ericaceae
Small Cranberry
[Vaccinium microcarpum (Turcz. ex Rupr.) Schmalh., moreVaccinium microcarpus (Turcz. ex Rupr.) Schmalh., Vaccinium palustre Salisb.]
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Sam P. Vander Kloet in Flora of North America (vol. 8)
Plants trailing, shoots 0.1-0.3(-0.5) dm. Leaf blades glaucous abaxially, green adaxially, ovate, sometimes elliptic, 3-10 × 1-5 mm, coriaceous, margins entire, strongly revolute. Inflorescences in axils of leaflike bracts at base of previous year´s or older shoots, (leafy portion often failing to elongate). Pedicels nodding, slender, 2-3 cm, bracteolate or not; bracteoles 1-5, reddish, scalelike, to 1 mm wide. Flowers: calyx lobes relatively small; corolla strongly reflexed at anthesis, white to deep pink; filaments hairy; anther tubules 2-2.5 mm. Berries deep red, red-spotted at first, 6-12 mm diam., smooth. 2n = 24, 48, 72. Flowering early summer. Half buried in Sphagnum hummocks in bogs, fens, muskeg, arctic-alpine tundra; 0-1500 m; Greenland; St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon; Alaska, Calif., Conn., Idaho, Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., Ohio, Oreg., Pa., R.I., Vt., Wash., W.Va., Wis.; n Europe; n Asia. Vaccinium oxycoccos is interruptedly circumboreal (absent from the Canadian Arctic Archipelago, including Baffin Island) extending southward in North America to California in the Cascade Range and to West Virginia in the Appalachian Mountains. In Europe, some chromosome races of Vaccinium oxycoccos have been given specific rank (S. P. Vander Kloet 1983) at one time or another; unfortunately, hexaploids cannot be differentiated consistently from diploids or tetraploids using morphological features such as leaf indumentum or bract size.

On most vines, especially north of 50° north latitude, the leafy portion of the fertile shoot fails to develop, giving the illusion that Vaccinium oxycoccos has an inflorescence comprising a short rachis bearing flowers on a slender pedicel.

From Flora of Indiana (1940) by Charles C. Deam
Found only in boggy places associated with sphagnum. It is exceedingly rare and, no doubt, will soon become extinct except possibly in the La Porte County station.

……

Indiana Coefficient of Conservatism: C = 10

Wetland Indicator Status: OBL

Vascular plants of NE US and adjacent Canada
Much like no. 17 [Vaccinium macrocarpon Aiton]; lvs flat to strongly revolute, ovate or elliptic-ovate, 2-10 mm, commonly acute; fls 1-4 from the axils of the uppermost reduced lvs, forming a terminal cluster; bracteoles red, scale-like, 0.5-1.5(-2) נ< 1 mm, borne somewhat above to considerably below the middle of the pedicel; style 3-4 mm; fr 6-12 mm; 2n=24, 48, 72. Bogs; circumboreal, s. to N.J., Pa., O., n. Ind., and Minn. May-July. (Oxycoccus o.; O. palustris; O. quadripetalus)

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.
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Developments of SEINet, Symbiota, and associated specimen databases have been supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)