[34] Elliott: Histological variations of _Quercus Muhlenbergii_. University of Kansas Science Bul. 9:45:54:8 Plates:1914. [35] Gorby: Trees and shrubs indigenous to Miami County, Ind. Geol. Rept. 16:168-170:1889. [36] Wilson: Flora of Hamilton and Marion Counties, Indiana. Proc. Ind. Acad. Science. 1894:156-176:1895. [37] Higley and Raddin: Flora of Cook County Illinois, and a part of Lake County Indiana. Bul. Chicago Acad. Sci. Vol. 2: 106:1891 [38] Nieuwland: Notes on our local flora. Amer. Mid. Nat. Vol. 3:230:1914. [39] Michaux: North American Silva. J. J. Smith's Trans. Vol. 1:37:1871. [40] Nieuwland: Notes on our local flora. Amer. Mid. Nat. Vol. 3:230:1914. [41] Prof. B. Shimek told me that recently a few trees were found about 30 miles west of Iowa City, Iowa. [42] Sargent: Notes on North American Trees. Bot. Gaz. Vol. 65:424:1918. [43] Brown: Trees of Fountain County, Ind. Geol. Rept. Vol. 11:123:1882. [44] Sargent: Notes on North American Trees. Bot. Gaz. Vol. 65:427:1918. [45] Bot. Gaz. Vol. 67:217-229:1919. [46] Hill: Notes on Celtis pumila, etc. Bul. Torrey Club: Vol:27:496-505:1900. [47] Bot. Gaz. Vol. 67:228-229:1919. [48] Garden & Forest 9:375:1896. [49] =Morus alba= Linnæus. White Mulberry. A small crooked tree; leaves ovate, sometimes lobed, blades 6-13 cm. long, cordate at the base, acute at apex, at maturity glabrous above and glabrous beneath or with some hairs on the veins and in the axils of the veins; fruit subglobose or oblong, 1-2 cm. long, white to pinkish. This is an introduced tree and has been reported as an escape in many parts of the State, especially by the older botanists. =Morus alba= variety =tatarica= Loudon, the Russian mulberry, has been reported as an escape. The writer has seen single specimens as an escape in woods in Cass and Marshall Counties. It can be distinguished by practically all of the leaves being more or less lobed and the reddish fruit. This form was introduced into the United States in great numbers about fifty years ago by the Mennonites. It was especially recommended by nurserymen for fence posts and it has been planted to some extent in Indiana, but it cannot be recommended. It grows too slowly and is too crooked to compensate for any lasting qualities the wood may have. =Morus nigra= has been reported from Indiana by Phinney, Brown and McCaslin as a forest tree. Since this is an introduced tree, and is not supposed to be hardy in our area, their reports should be transferred to some other species. [50] Amer. Midland Naturalist Vol. 3:347:1914. [51] Contributed by W. W. Eggleston, Bureau Plant Industry, Washington, D.C. [52] Proc. Ind. Acad. Sci. 1917:445:1918.