Page  208




Liana N. May

Collinsonia canadensis L. Lamiaceae Richweed

Significance ofReport.Significant range extension northward.

Previous Knowledge. Collinsonia canadensis is widespread in the eastern UnitedStatesandCanada, rangingfromFloridato Ontario andwestwardtoMissouri, southern Michigan, Illinois, and southeastern Louisiana, though it is absent from much of the southeastern coastal plain. It is presumed extirpated in Wisconsin (SX), possibly extirpated in New Hampshire (SH), and rare in Vermont and Louisiana (S2) (Kartesz 1994, NatureServe 2015). The global conservation status is ranked as secure (G5) though roughly half of the range, including Michigan, has not been reviewed and ranked (NatureServe 2015). It is found in mesic deciduous forests and occasionally in deciduous swamps (Voss and Reznick 2012). Several medicinal uses of this herb have been documented (Hamel et al 1975; Herrick 1977).

Discussion. One small colony of Collinsonia canadensis was documented during the summer of 2010 along the border of a rich conifer swamp and old fieldin the Cedar River Preserve in Leelanau County, Michigan, which is owned bythe Leelanau Conservancy.Thoughthisspecies hasbeencollectedthroughout Southern Lower Michigan, this is the first collection north of Saginaw and Kent Counties, thereby significantly extending the range northward.This is the northernmost record, not only for Michigan, but also possibly for the United States (Kartesz 2015). Collectors should be aware that this species may be found in intermediary counties and in northwestern Lower Michigan.

Diagnostic Characteristics. Collinsonia canadensis is the only species of Collinsonia in Michigan. It can be distinguished from other species in Lamiaceae by its combination of tall stature, broadly ovate leaves, and loosely-flowered terminal racemes of pale yellow, bilaterally symmetrical, flowers that have afringedlower lip.The pedicels extendbeyondthe minute subtendingbract.The two fertile stamens are long-exerted, and the style is gynobasic. The plant spreads by stout rhizomes. The leaves have a lemon-like fragrance (Voss and Reznicek 2012).

Specimen Citation. Michigan. Leelanau Co: NW¼ of NE¼ Sec. 9, T28N R12W. Cedar River Preserve, 1.5 mi east of Cedar, 0.5 mi south of S. Lake Lee


lanau Rd. One small colony of approx. 20 individuals along upland edge of the rich coniferous swamp at the border of old farm field on mesic soils in partial shade. 44º50¢ 47.90¢¢ N, 85º46¢ 06.30¢¢ W ±6 m.WGS 84. 186 melevation.Associates: Thuja occidentalis, Pteridium aquilinum, Bromus inermis. July 15, 2010. May 005 (MICH).

Vaccinium corymbosum L. Ericaeae Highbush blueberry

Significance ofReport.Significant range extension northward.

Previous Knowledge. Vaccinium corymbosum is a native blueberry of wet sandy or peaty areas, wetland forests, shrublands, bogs, fens, and rarely oak forests in the eastern United States and Canada (Voss and Reznicek 2012; Kartesz 1994). In the U.S., native populations are concentrated in southern Michigan, New England, the mid-Atlantic states, and the Atlantic and Gulf coastal plain from southeastern Virgina to eastern Texas (Kartesz 2015). This species is secure globally (G5), but declining in several regions, including New Brunswick, Illinois, and Oklahoma, where it is critically imperiled (S1), and Quebec,whereitis vulnerable(S3)(Kartesz1994, NatureServe2015).Theblue- berries of commerce are derived from cultivars of this species in NorthAmerica, which are often planted beyond its native range.

Discussion. During the growing season of 2016, three individual shrubs of Vaccinium corymbosum were found in a hardwood–conifer swamp at Soper Nat- uralArea in the northern quarter of Leelanau County, Michigan, which is owned by the Leelanau Conservancy,. This extends the range of V. corymbosum north- wardfromMasonCounty. Commercialplantationsofthisblueberryarecommon in Leelanau and Benzie counties, including on several remnant farms that are now within Sleeping Bear Dunes National Lakeshore; these populations were not been included in the Lakeshore’s flora (Hazlett 1991). The population at Soper Natural Area does not appear to have spread from cultivation. The plants are isolatedwithin alarge wetlandofnative flora, and,thoughthe parcel was his- toricallya farmstead,it wasusedforgrazingcattleandthereisnorecordofblueberry cultivation. Collectors should be aware that this species may occur across northern Lower Michigan and should be looked for in similar wetland habitats.

Diagnostic Characteristics. Vaccinium corymbosum is easily distinguished from other species of Vaccinium in Michigan, since it is the only species greater than one meter in height.The corollas are large, 6.5–8.5 mm long, and the leaves are mostly 4–5.5 cm long (Voss and Reznicek 2012).

SpecimenCitation.Michigan,LeelanauCo:S½ofNE¼Sec4,T31NR11W, Leelanau Township. Soper Natural Area, one mile southwest of the village of Northport on Johnson Rd. Fifty meters N of Johnson Rd, 0.4 mi W of the M-22 intersection in hardwood-conifer swamp. 45.1207753ºN, -85.6306608ºW, WGS 84, ± 10 m., 204 m elevation. Associated plants: Larix laricina, Thuja occidentalis, Linnaea borealis, Cypripedium reginae, Gaultheria procumbens, and Pyrola asarifolia. July 14, 2016. May 148 (MICH).

Page  210 210 THE GREAT LAKES BOTANIST Vol. 56


Hamel, P. B., and M. U. Chiltoskey. (1975). Cherokee plants and their uses:A 400 year history. Herald Publishing Co., Sylva, North Carolina.

Hazlett, B.T. (1991). The Flora of Sleeping Bear Dunes National Lakeshore, Benzie and Leelanau Counties, Michigan. The Michigan Botanist 30: 139–207.

Herrick, J. W. (1977). Iroquois medical botany. PhDThesis, State University of NewYork, Albany.

Kartesz, J.T. (1994).Asynonymized checklist ofthe vascular flora ofthe UnitedStates, Canada, and Greenland, second edition. Timber Press, Portland, Oregon.

Kartesz, J. T. (2015). The Biota of North America Program (BONAP). North American Plant Atlas. ChapelHill, NorthCarolina. [mapsgeneratedfromKartesz, J.T. 2015. FloristicSynthesisof NorthAmerica, Version 1.0. Biota of NorthAmerica Program (BONAP). (in press)]. Available at (Accessed December 5, 2016)

NatureServe. (2015). NatureServe Explorer: An online encyclopedia of life. Version 7.1. Nature- Serve, Arlington, Virginia. Available at (Accessed December 5, 2016 ).

Voss, E. G., and A. A. Reznicek. (2012). Field manual of Michigan flora. University of Michigan Press, AnnArbor.