FLORA OF WASHINGTON AND VICINITY, 71 



Linum striatum, Walt. 



Reform School. Falls Church. Third week in July. 



iljinum. usitatissimum, L. Common Flax. 

 Waste places in the city. August. 



GERANIACE^. 



Geranium Family. 



t Geranium maculatum, L. Spotted Cranesbill. 

 April or May. 



t Geranium Carolinianum, L. Carolina Cranesbill. 

 May. 



Geranium columhinum, L, Long-stalked Cranesbill. 



lu one small spot on Hunting Creek, also near Rosslyn on the Falls Church Eoad 

 (Professor Chickeriug). Last half of May. 



Geraniuia pusillum, L. Small-flowered Cranesbill. 

 Main street of Bladensburg. Latter part of May. 



Xirodium eicutarium, L'Her. Storksbill. 



Found only near the canal, at the foot of Ei ^hteenth street ; apparently introduced 

 and scarcely able to maintain its hold against opposition. March 20 to June. 



tOxalis violacea, L. Violet Wood-Sorrel. 



Occasionally found with a large conical tap-root, which, however, is clear, trans- 

 parent, and watery, and shrinks .away almost entirely on drying. This tap-root 

 proceeds from the bottom of the bulb. It terminates in a few small fibers and 

 throws off other and finer lateral ones. The plant has not been seen to bear fruit 

 here. Last half of May. 



tOxalis corniculata, L., var. stricta, Sav. [0. stricta, L.] Yellow Wood-Sorrel. 

 April to June. 



f Impatiens pallida, Nutt. Pale Touch-me-not. 

 Juno to September. 



t Impatiens fiilva, Nutt. Spotted Touch-me-not. 

 Jwie to September. 



RUTACEiE. 



Rue Family. 



Xanthoxylum Americanum, Mill. Prickly Ash. Toothache-Tree. 

 Pierce's Mill. Probably originally cultivated. 



t Ptelea trifoliata, L. Hop-Tree. Shrubby Trefoil. 

 Last half of May. 



ILICINEiB. 



Holly Family. 



tilez opaca, Ait. American Holly. 



Usually small, but in one locality, on Paint Branch, trees were found measuring 

 one meter in girth some distance above the base. End of May. 



