45 



4- The smaller always globose short-pedicelled drupe, in place 

 of the longer often elongated and long-pedicelled fruit of the 

 beach plum. 



5. A small and very turgid stone (nearly as thick as broad), 

 which is pointed only at the base. The stone of Primus niaritima 

 is flatter and usually pointed at both ends. 



6. Sprouts arising from the ground never produce flowers, as 

 they frequently do in the case of Prunus maritima. 



This plum was discovered by Dr. Charles B. Graves, of New 

 London, Connecticut, to whom I am indebted for specimens and 

 much of the substance of this paper, and whose name I wish to 

 associate with the plant as 



Prunus Gravesii n. sp. 



A low, unarmed shrub; stems erect or ascending, reaching a 

 maximum height of 12 dm., much branched, clothed with a dark 

 rough bark, leafless like the ascending branches; twigs and 

 branchlets less leafy, usually puberulent ; leaves orbicular or oval- 

 orbicular, varying towards orbicular-obovate, 2-4 cm. long, rounded 

 or retuse and apiculate at the apex, sharply serrate or those of 

 the shoots crenate-serrate, abruptly narrowed, rounded or truncate 

 at the base, sparingly pubescent or glabrate above, more pubes- 

 cent beneath, especially on the nerves; flowers pure white,. 

 1-3 cm. broad, solitary or 2-3 together, scattered on the twigs 

 near the top of the shrub; pedicels stiff, stout, 6-10 mm. long, 

 pubescent; calyx pubescent like the pedicels, the tube campanu- 

 late, the segments oblong, as long as the tube ; petals sub-orbi- 

 cular, about 5 mm. in diameter, abruptly narrowed at the base ; 

 drupe globose, solitary, 10-15 mm. in diameter, usually 12.5-13 

 mm. in diameter, deep purple or almost black with an abundant 

 light blue bloom, bitter and slightly astringent; stone broadly 

 oval, broadly crested, 7.5-9 mm. long, 7-8 mm. broad and 6-6.5 

 mm. thick, very turgid on one side, acute at the base, rounded at 

 the apex. 



In the year 1895 the species flowered during the last week of 

 May and matured its fruit the first week of September. 



