TREES AND SHRUBS 



Leaves alternate, on young plants and suckers cordate, 7-8 ins. long and 

 wide ; those on older trees about \ the size, commonly without sinuses, crenate, 

 with obtuse teeth. 



A deciduous tree, 120-150 ft. ; very erect, rapid in growth ; Brcmches acutely 

 angled or winged. 



Native of N. America ; introduced to Europe 1769, and to England from the 

 Continent 1772. Probably a variety of P. nigra ; given in Kew Hand-list as 

 synonymous with P. canadensis and P. deltoidea. Called Necklace Poplar from 

 the fact that the female catkins resemble a string of beads ; also sometimes 

 called Black Italian Poplar. 



BLACK POPLAR, Popuhs nigra. 



River banks and moist places. March, April. Will grow in damp, boggy 

 soil and on exposed sites. 



Flowers dioecious, appearing before leaves ; Male catkins lax, pendulous, 

 dark red, 2-3 ins. long, drooping, scales hairy at tips; Stametis 12-30, usually 

 8, anthers purple ; Female catkins shorter, not drooping, greenish, cylindrical, 

 4 ins. long; Ovary ovoid-conic, stigmas 2, sessile, 2-8-lobed at apex, lobes 

 short and broad, yellow ; Frnit a capsule, ovoid, J in. long, glabrous, pedicelled, 

 2 valves, recurved, widely divaricating ; seeds cottony, ripe in May. 



Leaves alternate, nearly triangular, crenated, teeth small, acuminate, thick, 

 tough, green on both sides, glabrous beneath, rhombic, silky and ciliate in 

 young state, 1-4 ins. long, 2 ins. broad ; petioles slender, compressed, 1^2 

 ins. long. 



A deciduous tree, erect, 50-80 ft. ; Branches large, massive, ascending, 



smaller ones ramifying, greenish-white, young shoots smooth, shining yellow 



or light bronze ; Bark dark ash-grey, with large swellings, yellowish on young 



trees; Buds very viscid, sharp-pointed, thick, yellowish ; Suckers rarely produced ; 



rapid in growth; Wood white, soft, tough, not easily split; used for carving 



and charcoal ; bark for tanning. 



Not indigenous, but long naturalised. 



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