Plum Botany 17 



on the inner face; petals inserted remotely on the glandular 

 disk, narrowly obovate, rounded and more or less erose above, 

 contracted below into short claws, pure white; fruit globose 

 or rarely oblong, red or yellow. Sandy streams and hills south 

 and southeast Nebraska and central and western Kansas. Has 

 a few cultivated varieties, but they are little known. 



PRUNUS ALLEGHANIENSIS Porter. American Sloe. A 

 small, slender tree or shrub, 3-15 feet high; leaves lanceolate 

 or oblong-ovate, often long-acuminate, finely and sharply ser- 

 rate, softly pubescent when young; fruit dark purple, with a 

 bloom. Alleghany mountains in Pennsylvania. Not known 

 in cultivation. 



PRUNUS UMBELLATA Ell. Hog plum, or Southern Sloe. 

 A small, bushy tree ; flowers on slender pedicels nearly an inch 

 long, rather large, white; leaves smallish, ovate or slightly 

 obovate or sometimes short oblong, thin and dull, closely and 

 evenly serrate; fruit about three-fourths inch in diame- 

 ter, yellow or reddish ; flesh firm and austere ; stone short and 

 turgid, cherry-like. Seashore from South Carolina to Florida, 

 and westward to Mississippi, Louisiana and Arkansas. No 

 cultivated varieties. 



PRUNUS SUBCORDATA Benth. Pacific plum. A small tree 

 20-25 feet high ; leaves broadly ovate or orbicular, usually 

 cordate, sharply and often doubly serrate, slightly coriaceous, 

 dark green on the upper and pale on the lower surface ; flowers 

 in 2-4 flowered umbels on slender pedicels ; calyx lobes oblong- 

 obovate, rounded at the apex, half as long as the white petals: 

 fruit oblong, dark red or purple or sometimes yellow. Pacific 

 coast species. Occasionally cultivated. 



PRUNUS MARITIMA Wang. The Beach plum. A very 

 variable species. Low straggling shrub, 1-5 feet high, leaves 

 ovate or oval, finely serrate, softly pubescent underneath : 

 pedicels short, pubescent ; fruit globular, purple or crimson, 

 with a bloom, one-half inch in diameter; stone very turgid, 

 acute on one edge. Sea beaches, New Brunswick to Virginia. 

 Some distance from the coast has leaves smoother and thinner, 

 and fruit smaller. Perhaps this variation, mentioned in Grav's 

 Manual, is to be identified with Small's Prunus injucunda. 

 which is a form of the Beach plum growing in Georgia and 

 Alabama. Graves' plum, Prunus graresii Small, is a Con- 

 necticut form with small roundish, coarsely serrate leaves. It 

 is rare and of no practical consequence. The Beach plum is 

 sometimes cultivated, and gives promise of greater usefulness 

 in the future. The variety Bassett is to be referred to this 

 species. 



PRUXUS GRACILIS Engelm. and Gray. Oklahoma plum. A 

 small shrub, 1-4 feet high; soft, pubescent; leaves oblong- 



