Salic. SALICACE.E. 101 



A tree 12 to 18 metres in height, with a trunk sometimes 0.G0 metre 

 in diameter ; banks of streams ; very common ; varying in the shape of 

 the leaves and character of the aments (var. lancifolia and Fendleriana, 

 Bebb). 



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

 rays numerous, very obscure ; color light brown, the sap-wood lighter or 

 often nearly white. 



310. Salix longifolia, Mull. 

 Sand-bar Willow. 



Valley of the Connecticut River and of the Potomac River at "Wash- 

 ington ; west and northwest through the region of the great lakes to the 

 valley of the Mackenzie River, in latitude 66 c N., through the Mississippi 

 basin, Texas, the Rocky Mountain region, and the Pacific Coast States. 



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

 0.30 metre in diameter ; borders of streams and river sand-bars, in low, 

 wet sandy soil, often forming low, dense clumps ; rare east of the Alle- 

 ghany Mountains ; very common throughout the Mississippi River basin, 

 and reaching its greatest development in the valleys of Oregon and 

 northern California. 



Forms found from western Texas to Oregon, varying in the shape of 

 the leaves, aments, nature of pubescence, etc., are var. exigua, Bebb, and 

 var. argyrophylla, Anders. 



Wood light, soft, very close-grained, compact ; medullary rays numerous, 

 very obscure ; color brown tinged with red, the sap-wood brown. 



311. Salix sessilifolia, Nutt. 



Puget Sound southward, near the coast, and through the California 

 Coast Ranges. 



A small tree, 9 to 12 metres in height, with a trunk rarely exceeding 

 0.30 to 0.45 metre in diameter ; borders of streams, in low, wet ground. 



A form with narrower entire leaves, of the Sacramento Valley and the 

 California Coast Ranges, is var. Hindsiana, Anders. 



Wood light, soft, close-grained, compact ; medullary rays thin ; color 

 light red, the sap-wood nearly white. 



312. Salix discolor, Muhl. 

 Glaucous Willow. 



Labrador, west to the valleys of the Peace and Athabasca Rivers, south- 

 ward through the Atlantic region to Delaware and southern Missouri. 



A small tree, rarely exceeding 6 metres in height, with a trunk some- 

 times 0.30 metre in diameter, or more often a tall, straggling shrub 3 

 to 6 metres in height ; borders of streams and swamps, in low, wet soil ; 

 varying greatly in the form of leaves, aments, and nature of pubescence. 



