594 



SALICACEAE. 



Vol. I. 



5. Salix serissima (Bailey) Fernald. 

 Autumn Willow. Fig. 1455. 



5 1 . lucida serissima Bailey ; Arthur, Bull. Geol. Surv. 

 Minn. 3:19. 1887. 



S. serissima Fernald, Rhodora 6: 6. 1903. 



A shrub, up to 12° high, the bark brown or 

 yellowish-brown, shining. Leaves oblong-lanceo- 

 late, lanceolate or elliptic-lanceolate, mostly 

 acute or short-acuminate at the apex, narrowed 

 at the base, glabrous, glandular-serrulate, dark 

 green and shining above, pale beneath, 1F-4' 

 long, firm in texture; petioles slender, 6" long 

 or less, with 2 to 6 glands at the base of the 

 blade; aments terminating leafy branches, the 

 stalk and rachis pilose; staminate aments about 

 ¥ long, the pistillate 1-2' long in fruit, persistent 

 until autumn; scales deciduous; filaments hairy 

 below; stigmas distinctly stalked; capsule conic- 

 subulate, glabrous, 3"-6" long, short-pedicelled. 



In bogs and swamps, Quebec to New Jersey, Al- 

 berta and Wisconsin. May-July. 



6. Salix fragilis L. Crack Willow. Brittle 

 or Snap Willow. Fig. 1456. 



Salix fragilis L. Sp. PI. 1017. 1753. 



A tall, slender tree, with roughish gray bark, 

 attaining a maximum height of about 80° and a 

 trunk diameter of 7°, twigs reddish green, very 

 brittle at the base. Leaves lanceolate, long-acu- 

 minate, narrowed at the base, sharply serrulate, 

 glabrous on both sides, rather dark green above, 

 paler beneath, 3'-6' long, J'-i' wide; glandular 

 at the base of the blade; petioles 3"-*" long, 

 glandular above ; stipules semicordate, fugacious ; 

 staminate aments i'-a' long; stamens 2, or some- 

 times 3-4; filaments pubescent below, distinct; 

 pistillate aments 3-5' long in fruit, rather loose ; 

 stigmas nearly sessile; capsule long-conic, gla- 

 brous, 2}"-3" long, short-pedicelled. 



Escaped from cultivation, Newfoundland to New 



Jersey and Kentucky. Native of Europe. Hybridizes 



with Salix alba. The twigs break away and grow 



into new plants. Stag's-head, red-wood or varnished 



willow. April-May. 



Salix pentandra L., the bay-leaved willow of Europe 

 with shining ovate-oblong, short-acuminate leaves, and 

 smooth long-conic capsules rounded or impressed at the 

 base, is much planted for ornament, and occasionally es- 

 capes from cultivation. 



7. Salix exigua Nutt. Slender Willow. 

 Fig. 1457- 



Salix exigua Nutt. Sylva 1 : 75. 1842. 



5 1 . fluviatilis exigua Sargent, Silva 9: 124. 1896. 



S. luteosericea Rydb. in Britton, Man. 316. 1901. 



A shrub or small tree up to 20° high, the twigs often 

 permanently pubescent. Leaves linear to linear- 

 oblanceolate, small, usually not more than 3' long and 

 3" wide, short-petioled, entire, acute at each end, often 

 permanently silky-hairy; stipules early deciduous; 

 aments borne on lateral leafy branches, 2' long or less; 

 bracts obtuse, pubescent, deciduous; stamens 2, the fila- 

 ments hairy below; capsule silky when young, becom- 

 ing about 2J" long and glabrous when mature, very 

 short-stalked ; style very short, shorter than the stigmas. 



River and lake shores, Nebraska to Wyoming, British 

 Columbia, Texas and California. 



