1S2 



THE 



[vol. V 



account of the proximity of this area to the western prairies and closer 

 geographical connection with the Southwest. 



These deficiencies are, however, more than compensated by the 

 presence here of many northern and eastern species. And it is to this 

 element that the flora owes its peculiar interest. Amongst this class the 

 following species may be mentioned: 



Magnolia 

 Magnol 



Pseudoacacia 



Lonicera ft 



Ribes Cynosbati Dirca palustris 



Philadelphia pubescent Rhododendron roseum 



Amorpha glabra Halesia monticola var. vestita 



Menisperm 



Quercus 



ery 



lea trifoliata, 

 here. Thisli 



less, constitutes about ten per cent of the total, and if" to them were added 

 the herbaceous species, which are perhaps relatively more numerous, it 

 could be made much more impressive. Most of these plants are not un- 

 known northward in the Boston Mountains and some of them even in the 

 deep valleys and canyons along the southern margin of the Ozark plateau, 

 but they occur there only in a few peculiar and isolated spots, and these 

 become rarer and more widely separated as we advance northward. 



Magnolia acuminata is found along the margins of the old Mississippi 

 Embayment, in southeastern Missouri and southern Illinois. It also turns 

 up at a number of scattered localities in the Boston Mountains of northern 

 Arkansas and we have records of it as far northwest as Eureka Springs, 

 and along tributaries of the White River, in Barry County, Missouri. 

 Magnolia tripetala is much rarer and more restricted in this region. Besides 

 the station mentioned here, on the north side of Rich Mountain, I have 

 seen it only in swampy lowlands in Hot Springs County, Arkansas. It 



Ozark 



occur 

 wrong 



in one instance at least I have seen leaves of Asimina triloba masquerading 

 under this label. Ribes Cynosbati is also found in southeastern Missouri, 

 and on high, north-facing bluffs of Current River in Shannon County, 

 Missouri, and of James River in Stone County. In Arkansas, besides the 

 locality described here, I have collected it on Magazine Mountain, in Logan 

 County, where it is abundant on the north bluffs. Philadelphus pubescent 

 has a more southern range, although growing in similar situations, usually 

 m sandstone areas. The most northern stations at which I have seen it 

 in the Ozark region are along Buffalo River, a tributary of White River, 

 in Marion County, Arkansas, and at Jasper, Newton County, in the same 

 state. Amorpha glabra appears to be one of the most restricted species in 

 this region. The only other place at which I have seen it is on Magazine 



