Trees, Shrubs and Vines 



26, Downy Poplar. Swamp Cottonwood. (Populus 

 heterophylla.) 



Leaf : 4'-7', simple, alternate, serrate, broad-ovate, apex 

 blunt, base sometimes cordate, young leaves white-woolly, be- 

 coming almost smooth. Branches round. Range : west New 

 England to Illinois, and south ; swamps. (PI. V.) 



27. Red Mulberry. (Morus rubra.) 



Leaf : 3'-6', simple, alternate, crenate-serrate (sometimes 2-3- 

 V>bed), roundish to ovate, base cordate and often oblique, apex 

 pointed, rough above, soft-hairy beneath. Flower : in catkin- 

 like spikes. Fruit : reddish, then purplish, blackberry-like, in- 

 sipid ; July ; low tree and shrub. 



28. White Mulberry. (Morus alba.) 



•Leaf : 3'-6', as in 27, but glossy and smooth above, smooth 

 beneath. Fruit : whitish ; introduced, but becoming sponta- 

 neous. (PI. VII.) 



29. Paper Birch. Canoe Birch. (Betula papyrifera.) 



Leaf : 3-5', simple, alternate, serrate, broad-ovate to oval, 

 apex pointed, base cordate or obtuse. Bark chalky-white ; tree 

 much larger than white birch (65). Range : New England to 

 Pennsylvania and west (PI. IV.) 



30. Sea-side Alder. (Alnus maritima.) 



Leaf : 2'-4', simple, alternate, finely serrate, roundish to ob- 

 long, thickish. Flov^ter : in catkins in September. Delaware 

 and Maryland, near water ; low tree and shrub. 



31. Sweet Birch. Black Birch. (Betula lenta.) 



Leaf : 3'-5', simple, alternate (often in pairs), sharply serrate, 

 ovate to oval, apex pointed, base slightly cordate ; trunk-bark 

 dark, smooth, not peeling, but perpendicularly cracking ; twig- 

 bark aromatic. Range : northerly, and along Alleghanies ; 

 damp woods. (PI. IV.) 



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