FLOWERING PLANTS AND FERNS OF INDIANA. 713 



Q. platanoide8 (Lam.) Sudw. Swamp White Oak. 



(Q. bicolor Willd. 



Well distributed in the State along the borders of streams and 

 swamps, but not found in the central-eastern counties. A large tree, 

 from 90 to 120 feet in height, with a trunk diameter of from four to 

 eight feet. 



The wood is heavy, hard, strong and tough, checking to some ex- 

 tent in drying. It is used for the same purposes as the white oak; 

 locally to some extent for wheel stock. 



Flowers in May and June ; acorns ripen in September and Oc- 

 tober. 



Distribution general in situations indicated. 



Q. Michauxii Nutt. Basket Oak. 



Found in low, wet alluvial soil, especially in the southwestern 

 portion of the State. Dr. Ridgway reports it as common in Knox 

 and Gibson counties; at times the prevailing species on limited 

 areas. A tree about 100 feet high, with a trunk diameter ranging 

 from four to seven feet. 



The wood is easily split, very durable in contact with the soil, 

 tough and strong. Used for agricultural implements, wheel stock, 

 baskets, cooperage, fencing and construction. The large, sweet 

 acorns are eagerly eaten by stock. 



Flowers in April and May; fruit ripens in September and Oc- 

 tober. 



Distribution as indicated above. 



Q. Prinus L. Rock Chestnut Oak. 



This species was found by Miss Alida Cunningham in Tippecanoe 

 County in 1896. The form was growing in dry soil, and the tree 

 from which material was collected was about 80 feet in height, with 

 a trunk diameter of a little more than two feet. So far as I am 

 aware, the only record for the State. 



Q. acuminata (Michx.) Sarg. Yellow Oak. Chinquapin Oak. 

 (Q. Muhlenbergii Engelm.) 

 Well distributed throughout the State in rich soils. A tree from 

 80 to 100 feet in height, with a trunk diameter of from two to three 

 feet. According to Mr. Blatchley, two marked varieties of the 

 species occur in Vigo County. "In the one the leaves closely re- 

 semble those of the chestnut, being lanceolate, acuminate, sharply 

 serrate, the veins very prominent ; five and one-half inches long by 

 one and three-fourths inches wide (average). In the other the 



