322 SALICACE^. . 



ovate, serrate ; aments appearing with the leaves ; scales ovate-lanceolate, 

 woolly, black; ovaries pedicellate, lanceolate, smooth; style very short; 

 stigmas 2-cleft. 



Banks of streams. N. Y. to Virg. N. to Arct. Amer. April. T^.Stem 

 4 8 feet high, with yellowish-green branches. Leaves large and broad. 

 Aments an inch to an inch and a half long. Anthers yeUow. 



Heart-leaved Willow. 



18. S. petiolaris Smith: leaves lanceolate, serrate, smoothish above, 

 glaucous and silky-pubescent beneath ; stipules lunate, toothed ; aments 

 appearing before the leaves, loose ; scales obovate, obtuse, black at the tip ; 

 ovaries on long pedicels, ovoid, silky ; stigmas nearly sessile, 2-lobed, S. 

 grisea WMd. S. sericea Muhl. 



Banks of streams. N. Y. to Virg. Stem 4 10 feet high ; twigs green or 

 purple, tough but brittle at base. Aments scarcely an inch long ; the fertile 

 ones often recurved. Anthers at first reddish, then yellow, and finally brown. 



Dark Long-leaved Willow. 



19. S. vitellina Linn.: leaves lanceolate, acuminate, with glandular 

 serratures, smoothish above, paler and somewhat silky beneath ; stipules 

 minute or caducous ; aments appearing with the leaves, cylindric ; scales 

 ovoid-lanceolate, externally pubescent; ovaries sessile, ovate-lanceolate, 

 smooth ; style short ; stigmas 2-lobed. S. alba Linn. 



Road sides and about fanns. May. A tree 20 40 feet high, with numerous 

 somewhat erect branches ; twigs yellowish and shining. Fertile aments about 

 2 inches long. Introduced from Europe and naturalized in many places. Ac- 

 cording to Dr. Darlington S. Russeliana is naturalized along the Brandywine in 

 Pennsylvania. It is closely allied to, if not identical with, S. decipiens of Hoff- 

 man ; which is said to be a native of Arctic America. Yettoio Willow. 



2. POPULUS. Linn.Poflax. 



(From the Latin populus, the people ; on account of its having been used to 

 shade public walks.) 



Dioecious. Ament cylindric ; scales lacerately fringed at the 

 summit. STERILE FL. Anthers 8 30, arising from a turbi- 

 nate oblique entire single perianth, . FERTILE FL. Perianth 

 turbinate, entire. Stigmas 4. Capsule superior, 2-celled, 2- 

 valved, many-seeded. Seeds comose. 



1. P. bolsamifera Linn.: leaves ovate, acuminate, appressed-serrate, 

 smooth on both sides, white and reticular-veined beneath ; stamens very 

 numerous ; buds resinous. 



Can. Ver. Northern and Western N. Y. N. to the Arctic Sea. March. A 

 tree from 40 80 feet high. Sterile aments 2 3 inches, fertile ones at length 

 4 6 inches, long. Anthers purple. According to Mr. Douglass, on the North- 

 west Coast this tree sometimes attains the height of 140 feet. The young buds 

 are covered with an odoriferous balsam. Balsam Poplar. Tacamahac. 



2. P. candicans Ait. : leaves cordate, ovate, acuminate, obtusely and 

 unequally serrate, whitish and reticular-veined beneath ; petioles hairy ; 

 buds resinous. 



Woods. N. H. Ver. and N. Y. March. A tree from 4050 feet high, with 

 smooth and greenish bark. Leaves large, the petiole somewhat compressed 

 above. Fertue aments 6 inches long. The young buds, as in the preceding, are 

 covered with an odoriferous balsam. Balm ofGilead. 



