3IO 



COVILLE 



3. SALIX NUTTALLII Sargent. Nuttall Willow. 



Salix flavescens NuTT. Sylv. i : 65. 1842, not Host, 1828. 

 Salix ituiialluSA.KG^^T, Gard. «S: For. 8: 463. 1895. 



A small tree 3 to 5 meters (about 10 to 16 feet) in height and com- 

 monly 7.5 to 10 cm. (3 to 4 inches) in diameter. The leaves are ob- 

 ovate to oblanceolate, tapering at the base, acute or sometimes obtuse 



at the apex, entire or occa- 

 sionally somewhat crenate- 

 denticulate, the lower surface 

 with some scattered appressed 

 hairs or, on vigorous shoots, 

 a somewhat velvety pubes- 

 cence, but without the satiny 

 lustre of sitchensis. When in 

 flower this willow is conspic- 

 uous for its leafless twigs and 

 the prominence of the black, 

 sparsely hairy catkin scales. 

 The original specimens were 

 collected by Nuttall "in the 

 range of the Rocky Mountains " 

 at some point near the present 

 route of the Union Pacific 

 railway from Nebraska to 

 Oregon. 



Our Alaska material is as 

 follows : 



Skag^vay to Lake Ben- 

 nett. — From Skagway to 

 Glacier on the White Pass 

 railway, Coville and Kearney (Nos. 493, 503), F. A. Walpole, 1900 

 (No. 1076). From Bennett to Log Cabin, F. A. Walpole, 1900 

 (Nos. 10S3, 1 271). AtLakeBennett, J. B. Tarleton, 1899 (No. 21). 

 Cook Inlet. — At Halibut Cove in Kachemak Bay, Coville and 

 Kearney (No. 2416), the specimens in leaf only. 



The name Salix nuttallii is ordinarily used to designate a species 

 (or perhaps a group of species) finding its eastern limit in the Rocky 

 Mountains and its western limit at the shore of the Pacific. It occurs 

 as far south as Utah and Arizona, and in California extends south- 

 ward along the coast to the bay of Monterey and along the Sierra Ne- 

 vada to the San Bernardino range. Northward from California it is 



Fig. iS. Salix 7tHttallii Sargent: «, 

 pistillate catkin, natural size; b, pistillate 

 flower, enlarged six diameters ; c, d, leaves, 

 natural size. 



