434 
—_ 
Ittinois NATURAL History SURVEY BULLETIN 
Vol. 26, Art. 5 
Fig. 28.—Mentzelia oligosperma growing in thin loess just above a limestone cliff, south of 
New Canton, Pike County. 
spaces just above or just below slopes. 
Presumably it cannot compete with vig- 
orous species. 
*Torilis japonica (Houtt.) DEC. 
Hedge-parsley was found in hill prairie 
only at Chautauqua. This species seem- 
ingly is becoming widespread in I[]linois. 
Zizia aurea (L.) Koch. Golden alex- 
anders, a plant of both prairie and forest, 
grew in the rock prairie at Cave Creek. 
CORNACEAE 
Cornus drummondi Meyer. This dog- 
wood, common in thickets and in wood- 
land borders, was observed growing singly 
or in small thickets in loess prairie at 19 
sites. It was common also in the adjoin- 
ing coves. 
Cornus florida L. Scattered individuals 
of flowering dogwood, a very attractive — 
plant in springtime, were seen in Swarnes” 
and Cave Creek prairies. 
Cay aS 
ERICACEAE 
Vaccinium arboreum Marsh. Farkle- 
berry, or tree huckleberry, a plant of — 
rocky woods, was collected in rock prairie ~ 
at Government Rock. 
~ Vaccinium vacillans Torr. Hill or low 
blueberry, a species of rocky woods, bluffs, 
