SPECIES AND VARIETIES. 65 



serrated, smooth, paler beneath; catkins cylindrical, loose; 

 stamens three. — Wet woods and hedges. Fl. May, and often 

 again in August. 



** Male catkins sessile, females sessile or on very short 

 peduncles, with or without leafy hracts. 



S. purpurea : shrub ; leaves deciduous, lanceolate or oblong- 

 lanceolate, broader upwards, serrated, smooth, whitish be- 

 neath, sometimes opposite ; catkins narrow cylindrical, closely 

 packed ; stamens one under each scale, consisting of an entire 

 filament with double anther, or a forked filament with an an- 

 ther on each branch. There are several allied forms. — Marshes 

 and river-banks. Fl. March, April. 



S. viminalis : shrub or small tree ; leaves deciduous, linear, 

 inclining to lanceolate, elongated, taper-pointed, entire, wavy, 

 white and silky beneath; catkins cylindrical; stamens two, 

 distinct. — Common Osier.-— Marshy places. Fl. April, May. 



S. Caprea : shrub or small tree ; leaves deciduous, roundish- 

 ovate, serrated, wrinkled, finely toothed, glaucous and downy 

 beneath ; catkins cylindrical ; stamens two, distinct. — Com- 

 mon Sallow. — Woods and hedges. Fl. April. 



S. repens : dwarf creeping shrub ; leaves deciduous, small, 

 ovate-oblong or lanceolate, nearly entire, glaucous and silky 

 beneath; catkins short, cylindrical; stamens two, distinct. — 

 There are several varieties. — Heaths, moors, and sandy wastes. 

 Fl. May. 



(84) Populus. Poplar. 



P. alba: tree; leaves deciduous, cordate-ovate, angularly 

 toothed, snow-white and densely downy beneath ; catkins ses- 

 sile, about two inches long. — White Poplar or Abele. The 

 Grey Poplar is a variety with smaller leaves. — Damp woods. 

 Fl. March. 



