134 FLORA OF WASHINGTON AND VICINITY. 



Bromus ciliatus, L., var. purgans, Gray. 

 June. 



Bromus sienlis, L. 



Anacostia Road above Uuiontown, rare. Collected only July 8, 1877, then rather 

 advanced. 



tUniola latifolia, Michx. Spike-Grass. 



Bluffs of the Potomac. Last of July or in August. 



Uniola gracilis, Michx. 



Reform School. Last of July or first of August. 



tLoliumjJCJ-enjje, L. Darnel. Ray-Grass. Rye-Grass. 

 Last of May or iirst of June. 



Triticum repens, L. Couch-Grass. Quitch-Grass. Quick-Grass. 



Last of May. 

 Elymus Virginicus, L. Lyme-Grass. Wild Rye. 



July, August. 



Elymus Canadensis, L. 



August, September. 



Elymus striatus, Willd. 



First of July. , 



Elymus striatus, Willd., var. villosus, Gray. 

 High Island. First half of July. 



Gymnostichum Hystrix, Schreb. Bottle-brush Grass. 

 June. 



Danthonia spicata, Beauv. Wild Oat-Grass. 

 Middle of May to Middle of June. 



tTrisetum palustre, Torr. 



Not common. Last half of May. 



Aira flexuosa, L. Common Hair-Grass. 



Often nearly a meter in height. Last of May. 



Aira caryophijllca, L. 



Common in the eastern districts. First half of May. 



Holcus lanatus, L. Velvet-Grass. 

 June. 



t Anthoxanthum odoratum, L. Sweet Vernal Grass. 

 First half of May. 



Phalaris Canariemis, L. Canary-Grass. 



Sparingly springing up from refuse heaps in the city. June, July. 



tPaspalum setaceum, Michx. 

 August, September. 



Paspalum laeve, Michx. 

 August. 



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