BOTANY OF LA SALLE COUNTY. 119 



Maclura aurantia ca. Osage Orange. Bois d'arc. 

 MOR US rubra. Leaves large, ovate, serrate rough 

 above, on young shoots some are 2 or 3 lobed, 

 fruit a long, black berry. 



M. alba. Leaves small, smooth, fruit small, W. 

 URTI CA. gra cilis. Nettle. Along fences. 



U. dioica. Stinging Nettle. Very bristly. 



Lapor tea Canadensis. Wood Nettle. 



Pilea pumila. Stems shining, clear. 

 Jh. Parieta ria Pennsylvan ica. Shaded, rocky 

 places. 



Order 100. PLATANA CEAEX Plane Trees. 



Plat anus occidental is. Sycamore. Button wood. 



Order 101. JUGLANDA CEAE. Walnuts. 



Jug lans ciner ea. Butternut, White Walnut. 

 . J. nig ra. Black Walnut. Along streams. 



Car ya al ba. Shell-bark or Shag-bark Hickory. 



C. Sulca ta. Kingnut. Not common. 



C. amara. Bitternut, Pignut. 



Order 103. CUPULIF ERAK. Oaks. 



Bet ula papyrif era. White Birch. Common. 



Al nus serrula ta. Smooth Alder. 



Cor yluo America na. Hazlenut. Common. 



Os trya Virgin ica. Hop, Hornbeam, Ironwood. 



Carpi nus Carolinia na. Blue or Water Beech. 

 QUER CUS alba. White Oak. 



Q. macrocar pa. Bur Oak. Mossy-cup Oak. 



Q. lyra ta. Over-cup Oak, Swamp Post Oak. 



Q. bic olor. Swamp W'hite Oak. Wet places. 



Q. pri nus. Chestnut Oak. Not common. 



Q. ru bra. R. Oak Acorn, broad and short. 



Q. coccin ea. Sc. Oak. Leaves scarlet after frost. 



Q. coccin var. tinctor ia. Black oak. 



Q. ni gra. Bl. Jack. Barren Oak. Sandy lands. 



O. imbrica ria. Laurel or Shingle Oak. Ra. 



