44 MICHIGAN ACADEMY OF SCIENCE. 



FAMILY 20. CORYLACE^. Hai;el-nut Family. 



82. CARPINUS, Lin. 



268. Virginiana (Marsh.) Sudw. Hornbeam, Blue or water beach. Com- 



mon on Belle Isle and elsewhere. 



83. OSTRYA, Scop. 



269. Virginiana (Mill.) Koch. At places in Detroit. Rare. 



84. CORYLUS, Lin. 



270. Americana, Walt. Hazel-nut. Common on Belle Isle and elsewhere. 



FAMILY 21. CASTANEACEiE. Oak Family. 



85. FAGUS, Lin. Beech. 



271. Americana-latifolia, Muench. Near Palmer Park. Rare. 



86. QUERCUS, Lin. Oak. 



272. rubra, Lin. On Belle Isle and near Palmer Park. Rare. 



273. palustris, DuRoi. On Belle Isle. Common. 



274. coccinea x palustris, Hill. Near Palmer Park. Common. 



275. alba, Lin. On Belle Isle. Common. 



276. macrocarpa, Mx. On Belle Isle. Frequent. 



277. platanoides (Lam.) Sudw. Belle Isle, etc. Common. 



Obder 11. Ueticales. 



FAMILY 22. ULMACE^E. Elm Family. 



87. ULMUS, Lin. 



278. Americana, Lin. Elm. In woods on Belle Isle. Frequent. 



FAJVllLY 23. LUPULACE^. Hop Family. 



88. CANNABIS, Lin. 



279. sativa, Lin. Hemp. On ballast grounds, etc., Detroit. Rare. 



FAMILY 24. URTICACE.F. Nettle Family. 



89. URTICA, Lin. 



280. dioica, Lin. Stinging Nettle. North shores Belle Isle. Frequent. 

 280a. gracilis. Ait. Near water works. Rare. 



90. URTICASTRUM, Fabr. 



281. divaricatum (Lin.) 0. K. Wood Nettle. Belle Isle woods. Common. 



91. ADICEA, Raf. 



282. pumila (Lin.) Raf. Clearweed. Belle Isle woods. Common. 



Order 12. Santalales. 



FAJVIILY 25. SANTALACE.F;. Sandalwood Family. 



92. COMANDRA, Nutt. 



283. umbellata (Lin.) Nutt. Bastard Toad Flax. At Linden Park. Fre- 



quent. 



Order 13. Aristolochiales. 



FAMILY 26. ARISTOLOCHIACEiE. Birthwort Family. 



93. AS ARUM, Lin. 



284. Canadense, Lin. Wild Ginger. Belle Isle woods. Frequent. 



