2io DAVENPORT ACADEMY OF SCIENCES. 



LINACE^. 



Linum, Tourn. 



122. L. sulcatum, Riddell. Yellow Flax. 



Dry sterile soil; Cedar River region, Montpelier. 



123. L. usitatissimum, P. Common Flax. 

 Railroad tracks ; common. 



GERANIACEiE 



Geranium, Tourn. Cranesbill. 



124. G- tnacu latum, L. 

 Open woods ; common. 



125. G. Carolinianum, L. 



Sandy soil; along Cedar River ; Muscatine Island and Noels. 

 Oxalis, L. Wood Sorrel. 



126. O. violacea, L. 



( >pen woods ; common. 



127. O. comiculata, L., var. stricta, Sav. 

 Common. 



Impatiens, L. Balsam. Jewel-weed. 



i2«. /. pallida, Ntitt. Pale Touch-me-not. 

 Moist shady places ; not infrequent. 



129. I.fulva, Nutt. Spotted Touch-me-not. 



Habitat same as that of preceding species. Rather common. 



ZYGOPHYLLACEyE. 

 Tribulus, L. 



130. T. terrestris, L. 



Railroad track near Muscatine and Fruitland. Infrequent. 

 Fruit greatly resembles common sand-burr. 



RUTACEiE. 



Xanthoxylum, \.. 



131. X. Americanum, Mill. Prickly Ash. 



Dry woods, especially along rivers; frequent. 



Ptelea, P. 



132. P. trifoliata, P. Hop-tree. 



Dry soil, borders of woods, etc.; frequent. 



