Polygonum tenue Michx.

03152300
Polygonum tenm Miciiaux
Del. iVIihai Cos lea	2003
PLANTS OF ILLINOIS, USA
Polygonum tenue Michx.
det.: S.R. Hill, Dec. 2000 Polygonaceae
ILLINOIS: LASALLE COUNTY 41° 19' 30" N, 88° 51'
30" W Ottawa 7.5 min. quad.; T. 33 N, R. 3 E, SE/4,.
SW/4, NW/4, NW/4, sect. 14. South Ottawa; Libby
Owens Inc. property, fenced silica quarry at S side of DL
Rt. 71, on peninsula at W end of E water-filled pit. Elev.
ca. 480 ft. Disturbed nearly pure white silica sand with
some organic material over soft (crumbling) white silica
sandstone 'pavement'. Very dry.
Remnant dry sand prairie with scattered dwarfed
Quercus velutina, with Aristida basiramea, Panicum
villosissimum, Liatris aspera, Solidago speciosa,
Leptoloma cognatum, Artemisia camp&tris, Coreopsis
lanceolata. Flowers white; occasional scattered annual
herb in dry open sand with Hypericum gentianoides.
uS
Steven R. Hill 33125
7 September 2000