ISTATIVE AMERICAN SPECIES OF PEUNUS. 37 



wild state, yet a study of several of the varieties referred to this 

 group by pomologists reveals no botanical character of consequence. 

 The suggestion sometimes made that these varieties are hybrids of 

 Prunus Tiortulana with P. americana is without foimdation and has 

 probably arisen from a misunderstanding of the specific differences. 

 While Prunus Tiortulana is one of the most recent to receive botan- 

 ical recognition, this form of the species enjoys the distmction of 

 being apparently the first in which a horticultural variety has been 

 given a name in a pubhcation. This naming of a variety is a note- 

 worthy event in the development of American plums, and what is 

 known concerning the history of this variety has been related earlier 

 in this discussion. If Dodd, who is credited as being the one who 

 planted seed from which the Miner came, really had two lots of plum 

 seeds, as may perhaps be inferred from Mr. Giddings's account pre- 

 viously quoted, it is not clear which was the origin of the Miner or 

 whether it was the one obtained from the Horseshoe Bend of Talla- 

 poosa Kiver. This locality is in the northern part of Tallapoosa 

 County, Ala., and is about 150 miles south of the known range of the 

 species. 



Prunus Hortulana Mineri Hybrids. 



The mineri form of Prunus Tiortulana is supposed to have been 

 hybridized with Prunus americana (PI. XIII, fig. 6, Surprise; figs. 

 7, 8, Hammer), P. munsoniana, and P. pumila. 



Prunus Reverchonii Sargent. 



(Hog plum.) 



Prunus reverchonii Sarg., 1911, Trees and Shrubs, v. 2, pt. 3, p. 158. 

 Prunus pygrrm Munson, 1889, in Amer. Gard. v. 10, no. 5, p. 175. (Not P. 

 pygmaea V^md., 1796.) 



Leaves lanceolate to ovate-lanceolate and acuminate (PI. Ill, fig. 

 2), usually strongly conduphcate or troughhke and folding at the 

 base when pressed, mostly 5 to 7 cm. long, 2 to 3.5 cm. broad, or 

 those of the young shoots sometimes 9.5 cm. long and"4.5 cm. broad, 

 rounded or narrowed at the base and acute at the apex, the margin 

 glandular serrate, in age the glands appearing as callous points or 

 falling away and leaving the serrations rounded, green and glabrous 

 above, pale green and pubescent with scattered hairs below, or 

 sometimes rather densely pubescent when young, the pubescence 

 sometimes slightly tufted in the axils of the lateral veins; petioles 7 

 to 12 mm. long, slightly pubescent along the up})er sui'faco and usu- 

 ally with two to four glands near the apex; stipules linear, glandular 

 along the margin. Flowers apj)earing from the last of March to the 

 middle of April, with or before the leaves, in umbels of 2 to 4 or 

 rarely more, about 10 mm. broad; pedicels 6 to 9 mm. long, glabrous; 



