22 



base sometimes acute ; five-nerved ; primary veins of the blade 

 remarkably incurved ; margin closely crenated ; crenatures 

 glandular ; above intense but bright green, beneath paler, 

 and with fine reticulations. 



Leaves on young trees lanceolate and feather-nerved. 



N.B. I have met with several young trees of this in the 

 Gorenki gardens at Moscow, where nothing was known of 

 their origin. The beautiful pyramidal form of this plant 

 when 18 to 20 feet high, and its very short leafstalks, are 

 remarkable features. 



32. PopuLus candicans, Hort. Kew? Mich. Arb. Forest, 

 t. 98. f. 2. Spach. I. c.jo. 33. 



Tree subpyramidal, with bright green round branches, 

 which in adult trees are stout and brown ; heads swollen, 

 abounding in resin smelling like rhubarb. 



Stipules spreading, acute, balsamiferous. 



Petioles of adult trees long, equal to half the length of the 

 blade of the leaf, often longer, with a very open furrow run- 

 ning from the base to the apex. 



Leaves spreading, flat, and slightly cordate at the base, 

 broadly ovate or ovate-orbicular, shortly acuminate, delicately 

 five-nerved, deeply and flatly crenated ; crenatures connecting 

 a minute gland, which is sometimes obliterated, ovate-oblong 

 and even somewhat rhomboid leaves occur ; otherwise all are 

 coriaceous, above bright green and shining, beneath paler and 

 opaque, with very slender reticulations hardly even when old 

 rust-coloured. 



Leaves on young trees unknown. 



N.B. This tree occurs here and there planted about St. 

 Petersburgh. 



33. PopuLUS pseudo-balsamifera, Fisch. 



Tree large, pyramidal, bright green ; branches terete, 

 somewhat fastigiate, but also graceful in adult trees ; buds 

 slender, varnished with but a little balsam which smells 

 slightly. 



Stipules, in living specimens not seen, in dried ones appa- 

 rently adpressed. 



Petioles long, scarcely shorter than the blade of the leaves, 

 roundish, slender, with an open furrow extending from the 

 base to the apex. 



