FLORA OF WASHINGTON AND VICINITY. Ill 



t Celtis occidentalis, L. Hackberry. Sugarberry. 

 Early part of May. 



Humulus Lupulus, L. Common Hop. 



Rock Creek, near the Adams Mill; rare. August. 

 Cannabis saliva, L. Hemp. 



Waste lots in the city. August. 



Madura aurantiaca, Nutt. Osage-Orange. Bois c'arc. 



Deserted hedges, growing thrifty and bearing fruit. End of May. 

 tMorus rubra, L. Red Mulberry. 



Middle of May; fruit ripe in June. 

 Morus alba, L. White Mulberry. 



Roadside near Uniontown (Prof. J, H. Comstock), May 7, 1881. 

 tUrtica dioica, L. Nettle. 



July. 



tLaportea Canadensis, Gaudichaud. Wood-Nettle. 

 July. 



t Pilea pumila. Gray. Richweed. Clearweed. 



August. 



tBoehmeriacylindrica, Willd. False Nettle. 



Two forms; a slender, narrow-leaved, and a shorter, broad-leaved one. July 



August. ' 



Parietaria Pennsylvanica, Muhl. Pellitory. 



Below the Insane Asylum. First week in June. ' 



PLATANACEiE. 



Plane-Tree Family. 



tPlatanus occidentalis, L. American Plane-Trek. Sycamore. Buitonwood. 

 First week in May. 



JUGLANDACEiE. 



Walnut Family. 



Carya alba, Nutt. Shell-bark Hickory. Shag-bark Hickory. 



Rare, and perhaps only as intentionally planted. Middle of May; fruit, Septem- 

 ber or October. 



Carya microcarpa, Nutt. Small-fruited Hickory. 



It is to be hoped that this may be ultimately retained as distinct from C. alba. 

 The differences in this locality are immense. First week in May; fruit in October. 



t Carya tomentosa, Nutt. Mocker-nut. White-heart Hickory. 

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



t Carya porcina, Nutt. Pig-nut. Broom Hickory. Brown Hickory. 

 First week in May ; fruit, October. 



