820 Wisconsin Academy of Sciences, Arts, and Letters . 
202. Juncus Gerardi, Loisel. 
Rare; a single station only (and that now destroyed), 
in sand, Lake Michigan beach under willows. Both 
Gray and the Ill. Flora say of this rush, “Of rare oc¬ 
currence about the Great Lakes.” 
203. Juncus tenuis, Willd. Yard Rush. 
Common, occupying a variety of situations ranging 
from roadsides in hard, packed soil to low meadows. 
Our commonest rush, and varies greatly accordingly as 
environmental conditions are favorable or otherwise. 
204. Juncus Dudleyi, Wiegand. (Bull. Torr. Bot. Club, 27: 
524, 1900) 
Common; prairies. Well distinguished from J. 
tenuis by its cartilaginous auricles, few-flowered in¬ 
florescence and shorter involucral bracts. (Verified by 
Wiegand) 
205. Juncus Richardsonianus, Schult. (J. alpinus, VahL, • 
var. insignis, Fries) 
Rare; reported in Swezey’s list from Manitowoc Co. 
only, on authority of Th. A. Bruhin. Occurs at sev¬ 
eral points in wet sand on beach of Lake Michigan. 
Also met with on the edge of limestone pits at the Hor- 
licksville quarries. The station at which' this rush 
grows in greatest profusion has been preserved without 
molestation, and specimens collected by Dr. Davis in 
1879 at this very station, were by Dr. Engelman pro¬ 
nounced this species! Seeds hoarhound color. 
206. Juncus nodosus, L. 
Common; wet sand of Lake Beach and wet situations 
throughout. 
207. Juncus Torreyi, Coville. (J. nodosus, L., var. mega- 
cephalus, Torr.) 
Frequent; wet sand of Lake Beach and low prairies 
inland. FTot reported in any catalogue of Wisconsin 
plants. Very distinct, and properly raised to specific 
rank. Seeds cinnamon-colored. 
208. Juncus Canadensis, J. Gay. 
Occasional; in swamps and low grass land. A robust 
