496 



SALICACEAE. 



5. Salix fragilis L,. Crack Willow. 

 Brittle Willow. (Fig. 1177.) 



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; glandu- 

 lar at the base of the blade; petioles 3 // -8 // long, 

 glandular above ; stipules semicordate, fugacious^ 

 staminate aments i / -2 / 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, Massachuseetts to- 

 New Jersey and Pennsylvania. Native of Europe. 

 Hybridizes with the following species. The twigs 

 break away and grow into new plants. April-May. 

 Salix fragilis decipiens (Hoffm. ) Anders., with yellowish or red twigs and smaller brighter green 

 leaves, appears to be known only in cultivation within our area. 



/ 6. Salix alba L. White Willow. 



Huntingdon Willow. (Fig. 1178.) 

 Salix alba L,. Sp. PI. 1021. 1753. 



A large tree, sometimes 90 tall and a trunk diam- 

 eter of 8; bark gray, rough; twigs brittle at the 

 base. Leaves lanceolate or oblong-lanceolate, acute 

 or acuminate, narrowed at the base, serrulate, silky- 

 pubescent on both sides when young, less so and pale 

 or glaucous beneath when mature, 2 / -4J^ / long, 4"- 

 S // wide; stipules ovate-lanceolate, deciduous; peti- 

 oles 2 // -4 // long, glandless or sparingly glandular; 

 aments on short lateral leafy branches; scales decid- 

 uous; stamens 2; filaments distinct, pubescent at the 

 base; pistillate aments linear-cylindric, i^ / -2^ / 

 long; stigmas nearly sessile; capsule ovoid, acute, 

 glabrous, short-pedicelled or sessile. 



In moist soil, especially along streams, New Bruns- 

 wick and Ontario to Pennsylvania, sparingly escaped 

 from cultivation. Native of Europe. April-May. 



Salix alba coerulea (J. E. Smith) Koch, Dendr. 2: 512. 

 Salix coerulea]. E. Smith, Engl. Bot. pi. 2431. 1801. 



Mature leaves bluish-green, glabrous, glaucous beneath. Occasional in the Eastern States. 



Salix alba vitellina (L,.) Koch, Dendr. 2:512. 1869. GOLDEN OSIER. 

 Salix vitellina L.. Sp. PI. Ed. 2, 1442. 1763. 



Mature leaves glabrous above ; twigs yellowish-green. The commonest form in North America. 



7. Salix Babylonica L,. Weeping Willow. 



Ring Willow. (Fig. 1179.) 

 Salix Babylonica L. Sp. PI. 1017. 1753. 



A large tree, with rough gray bark, sometimes at- 

 taining a height of 70 and a trunk diameter of 6, the 

 twigs slender, green, elongated, drooping. Leaves 

 narrowly lanceolate, long-acuminate at the apex, ser- 

 rulate all around, narrowed at the base, sparsely pubes- 

 cent when young, glabrous when mature, green 

 above, paler beneath, 4 / -7 / long, $"-6" wide, some- 

 times curling into rings; petioles 3 // -6 // long, glandu- 

 lar above; aments appearing on short lateral leafy 

 branches; scales ovate-lanceolate, obtuse, deciduous; 

 stamens 2; style almost none; capsule ovoid-conic, 

 sessile, glabrous. 



Widely cultivated and sometimes spreading by tin- dis- 

 tribution of its twigs. Native of Asia. April-May. 



1869. BLUE WILLOW. 



