SALICACE^E. l-7 



I., section 74, for (Inscription of typical flowers.) This Order 

 comprises the Willows and Poplars. 



Synopsis of the Genera. 



1. Salix. Trees with mostly long and pointed leaves and slender branches. 



Bracts or scales of the catkins not toothed. Stamens mostly 2 under 

 each bract, but in one or two species as many as 5 or 6. Stigmas short. 

 Catkins appearing before or with the leaves. 



2. Pop'ulus. Trees with broad and more or less heart-shaped leaves. Bracts 



of the catkins toothed or cut at the apex. Stamens 8-30, or even more, 

 under each scale. Stigmas long. Catkins long and drooping, preceding 

 the leaves. 



1. SALIX, Tourn. WILLOW. 



* Catkins lateral and sessile, appearing before, the leaves. Scales dark red or 

 brown, persistent. Usually no leaf -like bracts at the base of the catkins. 

 Stamens 2. 



-- Leaves veiny, hairy or woolly, and with somewhat revolute margins. 



1. S. can'dida, Willd. (HOARY WILLOW. ) A shrub not more 

 than 3 or 4 feet high, growing in bogs and wet places ; the twigs 

 and leaves clothed with a web-like wool, giving the whole plant 

 a whitish aspect. Leaves lanceolate, narrow. Stipules small, 

 lanceolate, toothed. Catkins cylindrical. 



2. S. hu'milis, Marshall. (PRAIRIE WILLOW.) A shrub 3-8 

 feet high, growing usually in dry or barren places. Leaves 

 lanceolate, not so taper-pointed as in No. 1, slightly downy 

 above, thickly so beneath. Stipules semi-ovate or moon-shaped, 

 with a few teeth, shorter than the petioles. Catkins ovoid. 



-*- -*- Leaves smooth and shining above, not woolly beneath. Catkins large t 

 clothed with long glossy hairs. 



3. S. dis'color, Muhl. (GLAUCOUS WILLOW.) A shrub or 

 small tree, 8-15 feet high, growing in low grounds and along 

 streams. Leaves lanceolate or ovate-lanceolate, irregularly 

 toothed in the middle of the margin, entire at each end, white- 

 glaucous beneath. Stipules moon-shaped, toothed. 



The 3 species just described frequently have compact heads of leaves, resem- 

 bling cones, at the ends of the branches. This is probably a diseased condition 

 due to puncturing by insects. 



4. S. petiola'ris, Smith. (PETIOLED WILLOW.) A shrub on 

 sandy river-banks. Leaves lanceolate, finely and evenly serrate, 



