ï~~2003
THE MICHIGAN BOTANIST
257
Rubus parviflorus Nutt. THIMBLEBERRY. Locally in gravelly upland woods and borders.
One of the famous (at least among botanists) Great Lakes "western disjuncts" (Marquis &
Voss 1981), here at the southern edge of its range in this part of Wisconsin. (252, 1891,
2392, 2715)
Rubus pensilvanicus Poiret (R. frondosus Bigelow; including R. abactus Bailey) PENNSYLVANIA BLACKBERRY. Collected from a low woods of paper birch, balsam poplar, fir,
and red maple in the CNF. (Gale & Struick s.n. WIS, 1957- annotated "R. abactus complex" by A. M. Fuller.)
Rubus pubescens Raf. DWARF RASPBERRY. Abundant in damp woods and swamps. (136,
3256)
Rubus setosus Bigelow (including R. regionalis Bailey, R. superioris Bailey, and R. vermontanus Blanchard) BRISTLY BLACKBERRY. In a variety of habitats, including dry open
roadsides, damp woods, and bogs; frequent to fairly common. (387, 1318, 1330, 1517,
2420; Gale & Struick s.n. WIS, 1957-annotated by A. M. Fuller: "comes closest to R. regionalis.")
Sorbaria sorbifolia (L.) A. Braun FALSE SPIRAEA. Occasionally escapes cultivation. Once
established, this species is capable of forming extensive patches in rich mesic woods, even
dominating the shrub and ground layers in a large section of one maple-basswood woods.
East Asia. (1623, 1625, 1912)
Sorbus americana Marshall AMERICAN MOUNTAIN-ASH. Wet thickets and swamps,
rocky upland woods; occasional. Seedlings are frequently encountered in swamps. (999,
2577)
Sorbus aucuparia L. EUROPEAN MOUNTAIN-ASH. Spontaneous in a brushy old pasture
on the Kuse farm near Medford. Europe. (1800)
Sorbus decora (Sarg.) C. Schneider SHOWY MOUNTAIN-ASH. My one collection is from
a lone tree in a wet alder-sedge meadow, seemingly the wrong habitat. Also known from a
woods on the south shore of Rib Lake. (1153; Anderson 183 WIS, 1947.)
Spiraea alba Duroi MEADOWSWEET. Wet meadows, old fields, roadsides; common. (386,
1803)
Spiraea tomentosa L. STEEPLEBUSH, HARDHACK. Swamps, wet meadows, roadsides;
common. (1609)
Excluded species:
Crataegus calpodendron (Ehrh.) Medikus. Piehl (1955) notes it from a brushy pasture, however, no specimen could be located.
Crataegus pruinosa (Wendl.) K. Koch. Listed by Piehl (1955) from thickets and pastures. No
specimen located.
Spiraea x vanhouttei (Briot) Carr. BRIDAL WREATH. Not known as an escape in Taylor
County, but plantings are long- persisting, as in old cemeteries. (1111)
Additional records from adjacent counties:
Agrimonia pubescens Wallr. Rusk: shady roadside in oak-maple woods.
Chaenomeles lagonaria Koidz. Lincoln: "wild" in woods.
Crataegus fluviatilis Sarg. Clark, Lincoln, Price: sandy soil near streams; specimens at WIS.
I can find no reference to this "species" in recent manuals.
Crataegus succulenta Schradern (incl. C. macrantha Lodd.). Chippewa, Rusk: roadsides.
Geum macrophyllum Willd. Chippewa: edge of moist woods in rich soil. A state special concern species.
Geum triflorum Pursh. Chippewa: dry prairies and roadsides.
Potentilla intermedia L. Chippewa, Marathon: weed in sandy soil.
Potentilla tridentata Sol. Clark, Lincoln, Marathon: sandy places.
Prunus pumila L. Chippewa, Lincoln, Marathon: dry woods, sandy river banks.
Rosa acicularis Lindley. Price: " West of Round Lake."
Rosa palustris Marshall. Clark, Marathon: wet roadsides.
Waldsteinia fragarioides (Michaux) Tratt. Lincoln, Marathon, Price, Rusk: woods, riverbank,
firelane.
