IOWA ACADEMY OF SCIENCES. 
185 
Iowa Acad, of Sciences, Yol. 3, p. 132; Iowa Geol. Sur., 
Yol. 5, p, 238; Yol. 10, p. 313; Fink, Proc. Iowa Acad, of 
Sciences, Yol. 4, p. 101; Fitzpatrick, Proc, Iowa Acad, of 
Sciences, Yol. 5, p. 127 and p. 163; Yol. 6, p. 196; Iowa Geol. 
Sur. Yol. 8, p. 314; Gow, Proc. Iowa Acad, of Sciences, 
Yol. 6, p. 61; Cameron, Iowa Geol. Sur., Yol. 8, p. 198; Mac- 
bride, Iowa Geol. Sur., Yol. 4, p. 119; Yol. 7, p. 107; Yol. 9, 
p. 153; Yol. 10, p. 238 and p. 648; Reppert, Iowa Geol. Sur., 
Yol. 9, p. 386; Shimek, Iowa Geol. Sur., Yol. 10, p. 163; 
Barnes, Reppert, and Miller, Proc. Davenport Acad, of 
Nat. Sciences, Yol. 8, p. 256. 
ff Leaves sinuate, crenate, or toothed. 
Quercus platanoides (Lam.) Sudw. Swamp White Oak. 
Tree forty to one hundred feet high; bark gray, flaky; 
leaves obovate or oblong-obovate, base cuneate and entire, 
margin coarsely sinuate-crenate, white-downy beneath; 
acorns ovoid oblong, in pairs on long peduncles; cup hem- 
ispheric, scales lanceolate, pubescent, appressed, the upper 
acute or acuminate. Quercus prinus, platanoides Lam., 
Encycl., 1:720, 1783; Quercus bicolor Willd., Neue Schrift, 
Ges. Nat. Fr., Berlin, 3: 396, 1801; Quercus platanoides 
Sudw., Rep. Secy. Agric., 1892:327, 1893. 
The wood of this species is denser than the white oak, 
but not so dense as that of the post oak and is tough, hard, 
strong, and close-grained. So far as our observations go, 
trees rarely exceed eighteen or twenty inches in diameter. 
The wood is valuable for fuel, posts, lumber, etc. The 
species has a limited range in Iowa, though of frequent 
occurrence in that range. The small size of our trees pre- 
vents its use much beyond posts and fire wood. Our speci- 
mens are from Jefferson, Appanoose, Decatur, and Ring- 
gold counties. Professor Pammel reports the species from 
Lee, Muscatine, and Clayton counties; and Messrs. Barnes, 
Reppert, and Miller, from Scott and Muscatine counties. 
Arthur, Contr. to the Flora of Iowa, p. 29; Pammel, 
Proc. Iow r a Acad, of Sciences, Yol. 1, pt. 2, 1890-1891, p. 91; 
Fitzpatrick, Iowa Geol. Sur., Yol. 8, p. 314; Proc. Iowa 
Acad, of Sciences, Yol. 5, p. 163; Yol. 6, p. 196; Barnes, 
