FLORA OF WASHINGTON AND VICINITY. 77 



Prunus Chicasa, Michx. Chickasaw Plum. 

 Fort Maliaii. Third week in April. 



Prunus spinosa, L. Sloe. Black Thorn. 



Eoadside above Benning's. Third week in April. 



tPrunus Virginiana, L. Choke-Cherry. 



Opposite Alexandria (Professor Seamau). Hunting Creek (Dr. Vasey, 18'77). 



Prunus serotina, Ehrh. Black Cherry. 

 Middle of May. 



t Spiraea saUcifolia, L. Meadow- Sweet. 



Very rare ; not seen since 1874. 



Spiraea Aruncus, L. Goat's-beard. 



First half of June. 



tNeillia opulifolia, Benth. & Hook. ISpiraa opulifoUa, L.] Nine-Bark. 

 Last week in May. 



tGillenia trifoliata, Moench. Indian Physic. American Ipecac. 

 End of May. 



tRubus occidentalis, L. Black Raspberry. 



Last of May or first of June ; fruit rijie before the end of June. 



tRubus villosus, Ait. Blackberry. 



A variety was found May 17, 1874, which is "between B. villosus and E. trivialis" 

 (Gray). It has single flowers on long peduncles. Last half of May ; fruit in July; 

 autumnal flowers September 22 and October 27, 1878. 



tRubus Canadensis, L. Dewberry. 



iliddle of May ; fruit, third week in July. 



Rubus hispidus, L. Running Swamp-Blackberry. 

 Second week in June. 



Rubus cuneifolius, Pursh. Sand-Blackberry. 

 Insane Asylum. First of June. 



tGeum album, Gmel. Avens. Herb Bennett. 

 July. 



tGeum Virginianum, L. 



Hunting Creek. July. 



Geum strictum, Ait. 



Hunting Creek. Last of May or first of June. 



Geum vernum, Torr. & Gray. Spring Avens. 

 Georgetown College Grounds. End of April. 



tFragaria Virginiana, Duchesne. Strawberry. 

 May ; wild fruit not ripe till June. 



Fragaria Indica, Andr. Mock Strawberry. 



Mount Vernon; Georgetown College Grounds (Chickering). Last half of May; 

 fruit ripe early in June. 



