102 SALICACE.E. Salix. 



Wood light, soft, close-grained, compact, containing many evenly dis- 

 tributed small open ducts; medullary rays and layers of annual growth not 

 obscure ; color brown streaked with orange, the sap-wood light brown. 



313. Salix flavescens, Nutt. 

 Willow. 



Rocky Mountains of Idaho and Montana southward to southern New- 

 Mexico ; on the Cascade Mountains, Oregon, and the Sierra Nevada, 

 California. 



A small tree, sometimes 6 to 9 metres in height, with a trunk rarely 

 0.30 metre in diameter : borders of streams, reaching its greatest develop- 

 ment in the southern Rocky Mountain region. A form found from Alaska 

 to California upon dry hillsides and slopes near the coast, distinguished by 

 its broadly obovate leaves, larger size, heavier and harder wood, and dark 

 sap-wood, is var. Scouleriana, Bebb. 



Wood light, soft, not strong, close-grained, compact ; medullary rays 

 numerous, obscure ; color brown tinged with red, the sap-wood nearly 

 white. 



314. Salix Hookeriana, Barratt. 



Grand Rapids of the Saskatchewan ; coast of Washington Territory 

 and Oregon. 



A small tree, 8 to 9 metres in height, with a trunk rarely 0.30 metre 

 in diameter, or more often a low, straggling shrub with many prostrate 

 stems ; on the coast generally along the edge of beaches, or in low, 

 rather moist, sandy soil. 



Wood light, soft, close-grained, compact, containing many minute open 

 ducts; medullary rays thin, very obscure; color light brown tinged with 

 red, the sap-wood nearly white. 



315. Salix cordata, var. vestita, Anders. 

 Diamond Willow. 



Valley of the Missouri River and its tributaries, — Fort Osage, Mis- 

 souri, Iowa, Nebraska, and westward to about the one hundred and tenth 

 meridian. 



A small tree, rarely 8 metres in height, with a trunk 0.15 to 0.20 

 metre in diameter, or more often a low, straggling shrub, not exceeding 

 1.80 to 3 metres in height ; bottom-lands, in wet. sandy soil. S. cordata, 

 Muhl., of wide distribution through the Atlantic region, rarely, if ever, 

 attains arborescent size or habit. 



Wood light, soft, close-grained, compact, reported very durable in con- 

 tact with the ground ; annual layers of growth clearly defined ; medullary 

 rays very obscure; color brown or often tinged with red, the sap-wood 

 nearly white ; used for fence-posts. 



