5] 
4. Populus tremuloides Michaux. Corronwoop. QuaAkING Asp. 
Plate 22. Bark usually smooth, greenish-white or gray, turning an 
ash color on age and on old trees becoming rougher or fissured and 
much darker; twigs smooth or with a few hairs, reddish-brown, 
shiny the first season, gradually turning gray; leaves 3-9 em. (1144-4 
inches) long; usually wider than long, dark green above, lighter 
beneath, more or less pubescent when young, soon becoming gla- 
brous, petioles flattened; catkins at first 3-7 em. (1-3 inches) long, 
the fertile gradually increasing in length to about 10 em. (38 inches). 
Usually a small tree, 30-45 feet high, and less than 3 dm. (12 inches) 
in diameter. 
Distribution. Alaska and Hudson Bay south to the Ohio River 
and along the mountains of Mexico. Found in all parts of Indiana, 
becoming rare or infrequent towards the Ohio River. It is found 
usually in colonies in open places about swamps, lakes and along 
streams. 
The published records of the distribution are as follows: Clark 
(Baird and Taylor); Dearborn (Collins); Decatur (Ballard); Dela- 
ware (Phinney); Delaware, Jay, Randolph and Wayne (Phinney); 
Fountain (Brown); Franklin (Meyncke); Gibson (Schneck); Ham- 
ilton (Wilson); Jay (M’Caslin); Jefferson (Coulter); Knox (Ridg- 
way); Kosciusko (Clark), (Scott) and (Youse); Marion (Wilson); 
Miami (Gorby); Noble (Van Gorder); Posey (Schneck); Putnam 
(MacDougal); Steuben (Bradner); Vigo (Blatchley). 
Additional records are: Putnam (Grimes); Tippecanoe (Coul- 
ter); Allen, Lake, Laporte, Marshall, Porter, Steuben, Warren and 
Wells (Deam). 
Economic uses. Not of sufficient size and abundance to be of 
much economic importance. 
5. Populus deltoides Marshall. Corronwoop. Plate 23. Bark 
on old trees ash colored, deeply furrowed; branchlets round or those 
on vigorous trees angled, glabrous, yellowish-green becoming gray; 
leaf blades 4-12 em. (114-5 inches) long, usually about as wide, 
coarsely toothed, teeth glandular, incurved, lateral veins prominent 
on both sides, petioles flattened; flowering season March, April or 
May. 
Distribution. Quebec to Florida and west to the Rocky Moun- 
tains. Frequent in low woods and along streams in all parts of 
Indiana. The largest tree of the genus, usually 1-1.6 m. (3-5 feet) 
in diameter. In the original forests it was one of the largest of 
Indiana trees. 
