105 
-f"909. B. papyrifera, Marsh. Paper or Canoe Birch. 
B. papyracea, Ait. 
Rich and moist woods and banks; frequent, especially near the 
sandy sloughs southeast. (B.) 
Prof. Hill reports the following forms from Pine Station, Ind. : 
(a.) Leaves abrupt or wedge-shaped at the base, short pointed. 
( b .) Leaves heart-shaped at the base, somewhat pointed. 
(c.) Leaves abrupt or rounded at the base, long pointed. 
The trees were small, 10 to 20 feet high; bark white, except in the 
youngest trees; leaves on the young shoots large and hairy. 
910. B. pumila, L. Low Birch. Tag Alder. 
Two specimens were found in a slough near Lake George and East 
Chicago. Sloughs at Miller’s, Ind. ; common, BabcocJiS Rose 
Hill, Johnson . 
ALNUS, Tourn. 
911. A. incana, Willd. Speckled, Black or Hoary Alder. 
Banks of streams and sloughs; infrequent. April — May. 
Banks of Desplaines river, near Riverside. (B. P.) 
912. A. serrulata, Willd. Smooth iUder. 
Edgemoor, Ind., Boltwood. (B.) 
CORYLTJS, Tourn. 
913. C. amerlcana, Walt. Common Wild Hazel-nut. 
Clearings and woods; common. April. 
OSTRYA, Micheli. 
914. 0. virginica, Willd. American Hop-Hornbeam. Iron- wood. 
Lever wood. Deer-wood. 
Rich woods, throughout our district, especially north v/ard, but far 
from common. 
Usually the trees are much scattered. 
GAR.PINUS, L. 
915. C. Caroliniana, Walt. American Hornbeam. Blue or Water 
Beech. Iron-wood. 
C. americana , Michx. 
Ravines of the north ; rare. May. 
Calumet river, near Miller’s, Ind. Banks of the Desplaines river, 
Babcock ! 
QJJERCTJS, L. Oak. 
916. Q. alba, L. White Oak. 
Rich soil; common. May 20th — June 15th. 
