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 tills 



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 J3 III 



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Pop^J^if^.] LXXXV. SALICACE-^. 411 



2. PopuLus ZfwK. Poplar J 



Scales of the catkins usually jagged, very rarely quite entire. 

 Ferianth cup-shaped, oblique, entire, surrounding the stamens 

 ^nd pistil; nectariferous glands 0. — Barren Jl, Stamens 4— SO. 



fl. Stigmas 2, bipartite or 3 — 4-cleft. Caps. 2- 

 celled by the introflexion of the edge of the valves, loculicidal. 



>/ the people^ for such it was esteem 



ontii *o ^^ ^'^ ^^^ ^^^^ ^^ *^^ Eomans.^ 



i^ * Scales of catkins hairy or silky. Catkins in fruit dense. Stamens 

 Kjualit 4 — 8. Stigmas with narrow divisions. Leuce. 



1. P. '^dlha L. (great white P., or Ahele)\ leaf-buds downy 

 not viscous, leaves roundish-cordate lobed toothed glabrous and 

 shining above downy and very white beneath, old ones some- 

 times glabrous, fertile catkins while flowering more slender 

 tlian the barren ones, scales entire or incise only at the apex, 

 those of the barren flowers woolly of the fertile ones thinly 



... hairy, stigmas (yellow) bipartite their segments linear. E. B. 



'A t. 1618. 



pill Moist and mountain woods. Tz . 3, 4. — A large tree, with smooth 



M^ bark and spreading branches, of very rapid growth. Old leaves 



sometimes quite glabrous on both sides. Scales of the fertile catkins 

 caducous. It is impossible to say where this species, now so much 

 cultivated, is truly indigenous, or if it have any pretensions to be a 

 native of this country. The late Dr. Graham informed us that it 



never flowered about Edinburgh, indicating that it was a much more 



southern plant. The wood is white and soft, and only used for coarse 



work. All the British species have the young branches and shoots 

 \^^i cylindrical. 



^ 2. P. * canescens Sm. (gray P.) ; leaf-buds downy not viscous, 



■n '• leaves roundish deeply waved toothed hoary and downy beneath, 



old ones sometimes glabrous, fertile catkins as large as the bar- 

 ren ones, scales of both deeply palmatifid and sericeo-pilose, 

 stigmas (purple) cuneate irregularly 3— 4-lobed. E. B. 1. 1619. 



jfffffJ ^ ^Vet turfy meadows and dry heaths, scarcely indigenous. Frequent 

 arl-^ in Norfolk (Sm.). I^ . 3,4.— Tree tall and handsome, of slower 



growth than the preceding, and producing better wood. Usually con- 

 tounded with the last species on account of its downy leaves, and 

 those of the young shoots from the root being often also palmately 



5-lobed: Dr. Bromfield thinks it a variety : M. Spach, however, 

 considers it in reality much nearer the next, from which it is only 

 ^^y JO be distinguished with certainty by the leaf-buds and the leaves of 

 / ^^^^ root-shoots, which in P. tremula are never palmate. 



^- r. tremula L. (trembling 



* 





It 



ncarlvaVVm^ul^ *^^V^^' genus, a transverse section of a branch exhibits the pith of 

 in Sa'lij- ^^^^'^^ pentagonal form : an approach to the same may also be observed 



T 2 



