IOWA ACADEMY OP SCIENCES. 
101 
Laportea canadensis Gaudichaud. Low moist woods, com- 
mon. 
Pilfa pumila Gray. Low woods, frequent. 
Boehmeria cyHndrica Wiild. Low woods, frequent. 
JUGLANDACE^. 
Juglans cinerea L. Woods, frequent. 
J. nigra L. Woods, frequent. 
Cary a alba Nutt. Woods, infrequent here, but common 
along streams in Bremer county. 
G. amara Nutt. Woods, frequent. 
CUPULIPERAS. 
Betula payyrifera Marshall. Woods, infrequent. 
B. nigra L. Woods, frequent on the Turkey river. 
Corylus americana Walt. Thickets and open woods, common. 
Ostrya virginica Wiild. Woods, frequent. 
Garpinus caroliniana Walter. Woods, along streams, fre- 
quent. 
Quercus alba L. Woods, frequent ten miles northeast of 
Fayetie. 
Q. macrocarpa Michx. Woods, common. 
Q mulilenbergii Engelm. Woods on the Turkey river, infre- 
quent. 
Q. rubra L. Woods, frequent twelve miles northeast of 
Fayette. 
Q. coccinea Wang. Woods, common. 
Q. coccinea Wang,, var. tinctoria Gray. Woods, infrequent. 
SALICACE^. 
Salix nigra Marsh. Along streams, frequent. 
8. amygdaloides Anders. Low ground, frequent. 
8. lucida Muhl. Low ground, frequent. 
8. fragilis L., X alba L. Low ground, rare and probably 
introduced and escaped. Not before reported in Iowa. 
8. longifolia Muhl. Low ground, common. 
8. rostrata Richardson. Low prairies, infrequent. 
8. discolor Muhl., var. prinoides Anders. Low ground, com- 
mon. Perhaps not the variety. 
8. humilis Marsh. Prairies, frequent. 
8. sericea Marsh. Low ground, frequent. Mr. Bebb 
expressed surprise at finding this here, especially a “pure 
form,” which he said replaces 8. petiolaris Smith. 
