122 ILLINOIS ACADEMY OF SCIENCE 



0. Tuna. Key West, Fla. 



Specimens of what is supposed to be O. dillenii have 

 been secured from the main coast of Florida. The most 

 perfect by E. N. Reasoner. None show any definite differ- 

 ence from 0. Tuna except in size. 



0. pes-corvi. Sand wastes North and South Carolina, 

 more abundant in the mountain regions in Virginia and 

 West Virginia. This species although often resembling 

 O. opuntia is always smaller and the older growths always 

 prostrate. 



0. youngi. Sand wastes a few miles below Atlanta, Ga., to 

 Ybor City, Fla. 



0. pollardii. Coast near Biloxi, Miss. 



0. Traccyi. Sand wastes northward of Biloxi. One of 

 our smallest and spineist optuna. Spines are often more 

 than twice the length of the joint. 



0. humifusa. Havana, 111., and southward along the Illi- 

 nois river. Eaffluesque's type was undoubtedly from near 

 either Quiver or Beardstown. Therefore the true type is 

 procumbent or prostrate, with redisli brown bristles, 1 to 2 

 strong variegated spines and 1 to 3 secondary gray ones. 

 Flowers bright yellow. Fruit greenish or purplish on 

 upper side, small areoles bearing short bristles, pyriform, 

 with deep umbellicus, seed light gray. 



The unlimited number of variations extending from this 

 locality westward well into California and merging into 

 O. camanchica in the prostrate forms and 0. leptocarpa in 

 the upright forms unless well marked cannot reasonably 

 be separated as species. 



Opuntia fragalis. Distribution, sterile but often moist 

 situations, Lake Michigan to the foot-hills of eastern Colo- 

 rado, thence southward into Xew Mexico, where it becomes 

 var. hrachyarthera. Northern limits extending into Can- 

 ada southern limits; Kansas, central Iowa and southern 

 Wisconsin. The only dry fruited species east of the Mis- 

 sissippi. This little Ojnintia is also the most widely dis- 

 tributed and the most definite in character of any in the 

 aenus. 



