96 PHYSICAL GEOGRAPHY. 



76. Low Birch [Be tula pumilla.) Found rather frequently in 

 most of the timber belts on the Missouri, Nemaha and Niobrara. 



77. Western Birch (B. occidentallis.) Have found it only on the 

 Niobrara. 



78. Green Alder (Alnus viridis.) Have found it only on the 

 Niobrara. 



79. Speckled Alder [A. incana.) Sparingly in Northeastern Ne- 

 braska. 



80. Smooth Alder [A. serrulata.) Rare in eastern Nebraska. 

 Have only found half a dozen specimens along the counties on the 

 Missouri. 



81. Hoary Willow (Salix candidal) Common in low situations 

 over the greater part of Nebraska. 



82. Dwarf Gray Willow (S. tristis.) In eastern Nebraska; most 

 abundant north of the Platte, and especially on the Niobrara. 

 Rarely on the Republican. 



83. Bush Willow (S. humilis.) Missouri bottoms, Niobrara. 

 Loups, Elkhorn, Logan, Platte and Republican. 



84. Glaucous Willow (S. discolor?) Sometimes a small tree. 

 Republican River, Willow Creek, Loups, Elkhorn, and Missouri 

 bottoms. 



85. Heart-leaved Willow (S. cordata.) Lower Niobrara, 

 Platte, Nemaha, Republican, and occasionally on the Missouri bot- 

 toms. 



86. Narrow-leaved Willow (S. augustata.) Common over the 

 State. Have observed it on the west line of the State on the Re- 

 publican and Niobrara. On Loups, Elkhorn, etc. 



87. Long Beaked Willow (S. roslrata.) Habital same as the 

 preceding. Often a small tree. 



88. Shining Willow (S. lucida.) Low bottoms in eastern and 

 northern Nebraska, and on some of the tributaries of the Repub- 

 lican. 



89. Long Silver-leaved Willow (S. longifolia, var. argophylla.) 

 Mostly a shrub, but sometimes becomes a tree. Loup Rivers, Ni- 

 obrara, Republican and Missouri. 



90. Stalk-fruited Willow (S. pedicellaris.) On the Niobrara. 



91. Common Juniper (Juniperus communis?) Missouri River, 

 counties north of the Platte, and the Niobrara. 



