Helianthus strumosus L.

PLANTS OF ILLINOIS, USA
Helianthus strumosus L.
det.: S.R. Hill, Dec. 2000 Asteraceae
ILLINOIS: LASALLE COUNTY 41° 18' 38" N, 88° 57' 15"
W; Starved Rock 7.5 min. quad.; T. 33 N., R. 2 E.,
center of NW/4, NE/4, NE/4, section 26; Starved Rock
State Park; vicinity of IL Rt. 71 bridge crossing over
Hennepin Canyon Stream, NW quadrant of that crossing.
South side of Illinois River. Deer Park township (9 km
SW of Ottawa). Elev. ca. 600 ft. Disturbed sandy soil
and humus at roadside slope. Possibly calcareous.
Mesic upland forest bordering dry sandstone barrens at
canyon rim, Acer saccharum, Carya spp., Quercus spp.
Rays and disc yellow, most past flower; leaves scabrous;
frequent rhizomatous perennial ca. 1 m tall in large
colonies, on banks, slopes.
Steven R. Hill 33161
7 September 2000
02893294