120 BOTANY OF LA SALLE COUNTY. 



Castan ea sati va. Chestnut. In plantations. 



Order 104. SALIC A CEAE. Willows. 

 SA LIX ni gra. Black Willow. 20 to 25 ft. Streams. 



S. frag- ilis. Twig-s Y. W. or Cr. 60 ft. 



S. alba. White Willow. 50 to 80 ft. 



S. Babylon ica. Weeping- Willow. 50 ft. 



S. long-ifo lia. A shrub along- streams. 



S. rostra ta. A small tree. 



S. discolor. Pussy Willow. Several varieties. 4 

 to 10 ft. 



S. hu milis. Prairies, 3 to 8 ft. 



S. petiola ris. Stems red. Shrub. 

 POP ULUS. Poplar, Aspen, Cottonwood. 



P. al ba. White Pop. Leaves whitish. 



P. tremuloi des. Quaking- Asp, Aspen 



P. gradidenta ta. Leaves round-toothed. 



P. balsamif era. Aments larg-e, R. 



P. balsamif era var. con dicans. Balm of Gilead. 



P. manilif era. Cotton Wood. 



P. dilata ta. Lombardy Pop. Old places. 

 Sub Class II. GYMNOSPER MAE. Seeds naked. 



Order 107. CONIF ERAE. Pines, Conifers. 



Pi nus stro bus. W^hite Pine. 



P. resinosa. Red Pine. 



P. Austria ca. Austrian Pine. Plantations. 



Abies balsa mea. Balsam Fir. Plantations. Cones P. 



La rix Americana. Larch Tamarak. 



L- Europae a. European Larch. Both species 

 are sometimes planted. 



Thu ya. occidenta lis. Arborvitae, White Cedar. 



Junip erus. Virg-inia na. Red Cedar. Savin. 



Tax us. Canaden sis. American Yew. Ground 

 Hemlock. 



The last three are found along- the bluffs of the 111. 

 especially W. of Ottawa. 



