62 IOWA ACADEMY OF SCIENCES. 



Acer rnhnnii L. Red maple. Soft maple. Swamp tnaple. 

 Quite common. Grows luxuriantly on the banks of streams 

 and in all low, moist places. Very frequently planted in 

 groves and on lawns, where its soft wood is often broken by 

 high winds which it is unable to resist without the protection 

 of larger timber. 



('anja alba N. Shell-bark hickory. Common along the 

 larger streams, where it grows well up on the bluffs, and 

 occasionally in the bottoms. 



Carya glabra Torr. Pig nut. A somewhat smaller and 

 coarser species than the preceding. Usually found on lower 

 land. The two species are about equally common. 



Juglans nigra L. Walnut. Common along the larger 

 streams, where it grows luxuriantly and attains a good height. 

 Never seen on the prairie, except when planted there, which is 

 not often the case. The walnut was much more abundant a 

 quarter of a century ago than it is to-day, although it is still a 

 very common tree. Owing to the value of the wood it has 

 probably suffered more at the hands of woodmen than has any 

 other tree found in Adair county. 



Tilia americana L. Basswood. Linden. Quite common in 

 all river bottoms. Seldom seen elsewhere. 



Populu.s canadeniiis Desf. Cottonwood. Not rare. May be 

 found in occasional clumps in all low, moist situations. Is 

 occasionally planted in groves or hedges. 



Celti>i o(ride)if(Ui.s L. Hackberry. Not rare. Found only in 

 timber along the larger streams — always on low land. Is 

 occasionally transplanted and makes a very handsome lawn 

 tree. 



AemuluH flava Ait. Buckeye. A tolerably common species 

 along Middle river and the Nodaway, but never found on 

 Grand river. 



GlediUchia tracanthus L. Honey locust. Not common. Is 

 found in scattered groups along both the Nodaway and Middle 

 river. 



PruiiHH serofhta Ehr. Wild cherry. Tolerably common 

 along the roads and on all waste land. 



Prunus americana L. American plum. Wild plum. Very 

 common on all low lands. About equally abundant in the 

 larger timber and along the small prairie streams where it 

 and the wild crab are often the only species of trees. Occurs 

 occasionally on the uplands in company with hazel, bur oak 

 and sumac. 



