112 FLOEA OF WASHINGTON AND VICINITY. 



t Carya atnara, Niitt. Bitter-nut. Swamp Hickort. White Hickory. 

 Second or third week in May ; fruit, September or October. 



tJuglans nigra, L. Black Walnut. 



Second week in May ; fruit, October or November. 



Juglans cinerea, L. Butternut. 



Not common. Second week in May ; fruit, September or October. 



MYRICACEiE. 



Sweet Gale Family. 



Myrica cerifera, L. Bayberrv. Wax-Myrtle. 



Terra Cotta Swamp; also blufts of the Potomac, in Virginia; the former wet, the 

 latter dry ground. Rare ; fruit not yet seen. Very irregular in its flowering-time. 

 Staminate flowers have been collected May 2 and June 17, and fertile flowers May 

 30 and July 15 ; but both kinds have not been found at the same date. 



CUPULIFER^. 



Oak Family. 



tBetula nigra, L. River Birch. Red Birch. 



Last half of April or first of May ; fruit in June 



t Alnus serrulata, Ait. Smooth Alder. 

 Last half of March or first of April. 



t Carpinus Caroliniana, Walt. [C. Jmericaurt, Michx.] Blue Beech. Water-Bekch. 

 American Hornbeam. 

 Usually small, 5<=™ to 10«™ in diameter, but one tree is known which haa a girth 

 of If". April ; fruit, July. 



t Ostrya Virginica, Willd. Iron-wood. Lever-wood. Hop-Hornbeam. 

 April ; fruit, July. 



t Corylus Americana, Walt. Hazel-nut. Filbert. 

 Rather rare. April ; fruit, October. 



t Quercus alba, L. White Oak. 



First week in May ; fruit, September. 

 t Quercus stellata, Wang. [(). obtusiloba, Michx.] Post-Oak. Rough or Box 

 White Oak. 



First week in May ; fruit, late in September. 



Quercus macrocarpa, Michx. Bur-Oak. Over-cup Oak. Mossy-cup White Oak. 

 Aberrant forms ; only one small fruit-bearing tree known, located on Cameron Run. 



t Quercus bicolor, Willd. Swamp White Oak. 



Varies greatly in leaf and length of peduncle. There is a dwarf form at Little 

 Falls which bears fruit at the height of three to four feet, but these fruit-bearing 

 branches appear to proceed from a large subterranean stump which the annual ice- 

 gorges of that locality have prevented from rising above the ground. First week 

 in May ; fruit, end of September. 



