IOWA ACADEMY OF SCIENCES. 161 



This species occurs in rich woods, flowering in April and 

 May and the fruit ripening in October or November. It is 

 common throughout the state. The wood is heavy, hard, 

 strong, coarse-grained, liable to check in seasoning, and 

 takes a beautiful polish. The wood has been much used in 

 cabinet making, interior finish, for gun stocks, picture 

 frames, etc. For many years walnut logs were a common 

 shipment until the supply was practically exhausted. Oak 

 has now taken the place of the walnut in cabinet making. 

 The corrugated nut is frequently gathered and kept for 

 sale. A decoction of the bark is a frequent domestic dye. 



Our specimens are from Johnson, Jefferson, Decatur, and 

 Pottawattamie counties. We have observed the species in 

 Winneshiek, Allamakee, Clayton, Dubuque, Jackson, Scott, 

 Lee, Van Buren, Appanoose, Ringgold, Union, Page, Tay- 

 lor, Fremont, and Montgomery counties. The State Uni- 

 versity herbarium has specimens from Story, Calhoun, and 

 Delaware counties. Prof. Pammel reports the species 

 from Woodbury, Hamilton, Boone, and Hardin counties; 

 Mr. Reppert, from Muscatine county; Prof. Bessey, from 

 Fayette and Des Moines counties; Prof. Mac bride, from 

 Dubuque, Humboldt, and Dickinson counties; Mr. Gow, 

 from Adair county; Mr. J. P. Anderson, by note, from 

 Lucas county; and Mr. Mills, by letter, from Henry county. 

 In general the black walnut is common throughout the 

 state and represented mostly by the second growth trees. 



Parry, in Owen's Geol. Sur. Wisconsin, Iowa, and Min- 

 nesota, p. 618; White, G-eol. Sur. of Iowa, Vol. 1, p. 138. 

 Bessey, Contr, to the Flora of Iowa in Fourth Report Iowa 

 Agr. Col., p. 118; Arthur, Contr. to the Flora of Iowa, p. 

 29; Nagel and Haupt, Proc. Davenport Acad, of Natural 

 Sciences, Vol. 1, p. 163; Hitchcock, Trans. St. Louis Acad, 

 of Science, Vol. 5, p. 157; Pammel, Proc. Iowa Acad, of 

 Sciences, Vol. 3, p. 132; Iowa Geol. Sur., Vol. 10, p. 312; 

 Fink, Proc. Iowa Acad, of Sciences, Vol. 4, p. 101; Fitzpat- 

 rick, Proc. Iowa Acad, of Sciences, Vol. 5. p. 127 and p. 

 163; Vol. 6, p. 196; Iowa Geol. Sur., Vol. 8, p. 313; Came- 

 ron, Iowa Geol. Sur., Vol. 8, p. 198; Macbride, *Iowa Geol. 

 Sur., Vol. 4, p. 119; Vol. 7, p. 107; Vol. 10, p. 237 and p. 

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