MUSEUM OF NATURAL HISTORY. 



9 



(c) Red or Norway Pine {Pinus resinosa), in February, 14. Black Walnut 

 (Juglans nigra) in March. 15. White Poplar or Silver-Leaf Poplar (Populus 

 alba) in April. 16. Larch, Tamarack, Hackmatack, Juniper (Larix ameri- 

 cana) in May. 17. American Beech {Fagus americana) in June. 18. Lombardy 

 Poplar (Populus nigra italica) in July. 19. Red Mulberry (Mortis ruba), White 

 Mulberry (Morus alba) in September. 20. Scottish Rowan Tree or Moun- 

 tain Ash (Pyrus aucuparia) in October. 21. Red, Brown or River Ash 

 (Fraxinus Pennsylvanica) in November. 22. Balm of Gilead (Populus bal- 

 samifera) in December. 23. Sassafras (Sassafras sassafras) in January, 

 1909. 24. Birches: (a) Canoe, White or Paper Birch (Betula papyrifera), 

 (b) White, Gray, Poplar or Poverty Birch (Betula populifoUa), (c) Black, 

 Cherry or Sweet Birch (Betula lenta), (d) Red or River Birch (Betula nigra), 

 (e) Yellow or Gray Birch (Betula lutea), in February. 25. Hedge Trees: (a) 

 Buckthorn (Rhamnus cathartica), (b) Arbor-Vitae (Thuja oecidentalis), (c) Osage 

 Orange (Madura pomifera) in March. 26. Cottonwood or Necklace Poplar 

 (Populus deltoides), in April-May. 



