686 



CGI. SALICINE^3. 



Willow, 

 flower (mag.). 



Willow. 

 Embryo (mng.). 



Willow. 

 <? catkin. 



Willow. 

 9 flower (mag.). 



Black Poplar. (Populus nigra.) 

 <$ catkins. 



fopulus virgmiana, 

 9 catkin. 



Willow. (Salix caprcea.) 

 Q catkin. 



Willow. 

 Fruit (mag.). 



Willow. 

 Seed (mag.). 



Willow. 



Transverse section 

 of ovary 

 (mag.). 



Poplar. 

 9 flower (mag.). 



bract. FLOWERS $ : PERIANTH replaced by a glandular annular or urceolate and 

 obliquely truncate disk. STAMENS 2-oo , inserted on the centre of the torus ; filaments 

 filiform, free, or more or less connate ; anthers basifixed ; cells parallel, contiguous, 

 dehiscence longitudinal.- FLOWERS Q : PERIANTH 0, disk glandular or urceolate. 

 OVARY sessile [or pedicelled], 1-celled ; placentas 2, parietal ; styles 2, very short, more 

 or less connate, each terminated by a 2-3-lobed stigma; ovules many, ascending, 

 anatropous. CAPSULE 1-celled, valves 2, revolute when ripe, semi-seminiferous. SEEDS 

 numerous, erect, minute ; testa membranous ; hilum basilar, truncate ; funicle short, 

 thick, expanding into a woolly tuft which envelops the seed. EMBRYO exalbuminous, 

 erect ; cotyledons plano-convex, elliptic ; radicle very short, inferior. 



GENERA. 

 Salix. * Populus. 



