62 
IOWA ACADEMY OP SCIENCES. 
Acer Tubrum L. Red maple. Soft maple. Swamp maple. 
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. 
Garya alba N. Shell-bark hickory. Common along the 
larger streams, where it grows well up on the bluffs, and 
occasionally in the bottoms. 
Garya 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. Seldoru seen elsewhere. ^ 
Pojyulus canadensis Desf. Cottonwood. Not rare. May be 
found in occasional clumps in all low, moist situations. Is 
occasionally planted in groves or hedges. 
Geltis oGcidentalis L. Hackberry. Not rare. Pound only in 
timber along the larger streams— always on low land. Is 
occasionally transplanted and makes a very handsome lawn 
tree. 
Aesculus flava Ait. Buckeye. A tolerably common species 
along Middle river and the Nodaway, but never found on 
Grand river. 
Gleditschia tracanthus L. Honey locust. Not common. Is 
found in scattered groups along both the Nodaway and Middle 
river. 
Primus serotina Ehr. Wild cherry. Tolerably common 
along the roads and on all waste land. 
Primus 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. 
