168 FOREST TEEES OF NORTH AMERICA 



310. Salix longifolia, Muhlenberg, 



Neue Sckriften Gesell. Nat. Fr. Berlin, iv,238,t. 6, f. 6 (Ann. Bot. ii, 66, t. 5, f. 6). Willdenow, Spec, iv, 670. Persoon, Syn.ii, 600. 

 Pursh, Fl. Am. Sept. ii, 613. Nuttall, Genera, ii, 231. Torrey in Ann. Lye. N. York, ii, 248; Fl. N. York, ii, 209; Nicollet's Rep. 

 160; Fremont's Rep. 97; Emory's Rep. 412; Sitgreaves' Rep. 172; Bot. Mex. Boundary Survey, 204. Barratt, Sal. Am. No. 

 23. Beck, Bot. 320. Eaton, Mannal, 6 cd. 319. Eaton & Wright, Bot. 408. Hooker, Fl. Bor.-Am. ii, 149. Dietrich, Syn. v, 

 420. Parry in Owen's Rep. 618. Richardson, Arctic Exped. 439, 440. Cooper in Smithsonian Rep. 1858, 261. Andersson in Ofv. 

 af. Vet. Akacl. Forh. 1858, 116 (Proc. Ain. Acad. iv, 5G) ; Kongl. Sven. Akad. Handl. vi, 54, f. 35; Do Candollo, Prodr. xvi 3 , 214. 

 Walpers, Ann. v, 745. Lesquereux in Owen's 2d Rep. Arkansas, 369. Wood, Cl. Book, 653 ; Bot. & Fl. 310. Engelinann in Proc. 

 Am. Phil. Soc. new ser. xii, 209. Gray, Manual N. States, 5 ed. 465. Watson in King's Rep. v, 324 ; Wheeler's Rep. 1872, 493. 

 Gray in Proc. Am. Acad. vii, 402. Macoun in Geological Rep. Canada, 1875-'76, 210. Vasey, Cat. Forest Trees, 29. Hall in 

 Coulter's Bot. Gazette, ii, 91. Bebb in Wheeler's Rep. vi, 240 ; Bot. California, ii, 84. Ward in Bull. U. S. Nat. Mus. No. 22, 116. 



S. fluviatalis, Nuttall, Sylva, i, 73; 2 ed. i,89. 

 f S. rubra, Richardson, Arctic Exped. Appx. 37. 



S. longifolia, var. pedicellata, Andersson in Kongl. Sven. Akad. Handl. vi, 55, f. 35 ; De Candolle, Prodr. xvi s , 214. 

 Macoun in Geological Rep. Canada, 1875-76, 210. 



SAND-BAB WILLOW. 



Valley of the Connecticut river (Sunderland, Massachusetts, N. G. Jesup) and of the Potomac river at 

 Washington ( Ward) ; west and northwest through the region of the great lakes to the valley of the Mackenzie 

 river, in latitude 66 N. (Richardson), through the Mississippi basin, Texas, the Eocky Mountain region, and the 

 Pacific Coast states. 



A small tree, 6 to 9 meters in height, with a trunk rarely exceeding 0.30 meter in diameter; borders of streams 

 and river sand-bars, in low, wet sandy soil, often forming low, dense clumps ; rare east of the Alleghauy mountains; 

 very common throughout the Mississippi River basin, and reaching its greatest development in the valleys of 

 Oregon and northern California. 



Well-marked forms, varying from the type in the form of the leaves, aments, and nature of pubescens, etc., are 



var. exigua, Bebb in Bot. California, ii, 85. 

 S. exigtta, Nuttall, Sylva, i, 75 ; 2 ed. i,90. 



8. longifolia, var. angustissima, Andersson in Ofv. af. Vet. Akad. Forh. 1858, 116 (Proc. Am. Acad. iv, 56). 

 Western Texas to California and Oregon. 



var. argyrophylla, Andersson in Kongl. Sven. Akad. Handl. vi, 55; De Candolle, Prodr. xvi a , 214. Watson in King's Rep. v, 

 324. Porter in Hayden's Rep. 1872, 493. Rothrock, PI. Wheeler, 50. Porter & Coulter, Fl. Colorado ; Hayden's 

 Surv. Misc. Pub. No. 4, 128. Maconn in Geological Rep. Canada, 1875-76, 210. Bebb in Bot. California, ii, 85. 



8. argophylla, Nuttall, Sylva, i, 71, t, 20; 2ed.i, 87, t.20. 



t 8. brachycarpa, Nuttall, Sylva, i, 69 ; 2 ed. i, 85. 



S. longifolia, var. opaca, Andersson in Kongl. Sven. Akad. Handl. vi, 55. 



8. longifolia, var. argyrophylla angttstissima, Andersson in Kongl. Sven. Akad. Handl. vi, 55; De Candolle, Prodr. 

 xvi*. 214. 



S. longifolia, var. argyrophylla opaca, Auderssoa in De Candolle, Prodr. xvi 2 , 214. 



Western Texas to Oregon. 



Wood light, soft, very close-grained, compact; medullary rays numerous, very obscure; color, brown tinged 

 with red, the sap-wood brown ; specific gravity, 0.4930 ; ash, 0.48. Var. exigua, heavier, the heart- and sap-wood 

 darker colored ; specific gravity, 0.5342 ; ash, 1.06. 



311. Salix sessilifolia, Nuttall, 



Sylva, i, 68; 2 ed. i, 84. Andersson in Ofv. af. Vet. Akad. Forh. 1858, 116 (Proc. Am. Acad. iv, 56) ; Kongl. Sven. Akad. Handl. vi, 55, 

 f. 36; De Candolle, Prodr. xvi 2 , 214. Walpers, Ann. v, 746. Bebb in Bot. California, ii, 85. 



8. sessilifolia, var. Villosa, Andersson in De Candolle, Prodr. xvi 2 , 215. 



Puget sound southward to northern California, near the coast. 



A small tree, 9 to 12 meters in height, with a trunk rarely exceeding 0.30 to 0.45 meter in diameter; borders 

 of streams, in low, wet ground. 



