ISTATWE AMEEICAN SPECIES OF PRTJNUS. 39 



produced fruit identical in color with the variety Golden Beauty of 

 Prunus Tiortulana. This fruit was of good quality and was remark- 

 able in having the smallest stone of any specimen foimd, being about 

 9 by 6 by 5 mm. The stone is shghtly less pointed than usual, but 

 no other distinguishing differences were found. The species is used 

 locally in Texas for jeUies and presei'ves. 



Pkunus Reverchonii Hybrid. 



A form found near Henrietta, Tex., and referred to mider Prunus 

 mexicana, is apparently a hybrid. It may be characterized as follows: 

 Leaves ovate or sometimes nearly oval and acuminate, mostly 4.5 to 

 7 cm. long, 2,5 to 3.5 cm. broad, gTadually narrowed at the base, 

 acuminate toward the apex, sometimes abruptly so, dull green and 

 glabrous or nearly so above, pale and sparmgly soft-pubescent 

 below, the margins serrate, the serrations acute or often somewhat 

 obtuse, sometimes glandular, at least when young; petioles 7 to 10 

 mm. long, haiiy, and usually with one or more glands toward the 

 apex. Flowers appearing before the leaves, about 12 mm. broad, 

 in umbels ot 2 to 4, umbels short stalked, the stalk sometimes 3 mm. 

 long; pedicels slender and glabrous, 8 to 10 mm. long; calyx rather 

 narrowly campanulate, glabrous or sparingly and obscurely pubescent, 

 the tube about 3 mm, long, the lobes ovate, 2 mm, long, glandular, 

 and hairy within; petals oblong-orbicular and narrowed to a claw, 

 about 5 mm. long. 



, The hybrid is a small tree with the young twigs chestnut colored, 

 later becoming grayish; lenticels oval, not very prominent, and the 

 branches apparently without thorns. In texture of leaf it resembles 

 Prunus mexicana, but the shape of the leaf suggests that of P. rever- 

 chonii, and it resembles the latter also in the size of flowers and in its 

 calyx characters. One fonn, apparently a hybrid, also originating 

 near Henrietta, was for a time under cultivation in the nursery of 

 A. M. Ramsey, at Austin, Tex,, and by some other firms mider the 

 name of Ward's October Red. Mr. Ramsey grew a number of seed- 

 lings and these showed great variation; none of them, however, pro- 

 (hued fruit of merit, and the trees were destroyed in 1910. 



Prunus Rivulahis Scheele, 



(Creek plum,) 



Prunus rivularis Scheele, 1848, in Linnaja, Bd. 21, Heft 5, p. 594, 

 Prunus texana Scheele, 1848, in Linnaa, I'.'l. 'i\ . Ifcfl, 5, p. 59.'5. (Not Dietrich, 

 1843.) 



Leaves ovate to oblong-ovate (PI. Ill, lig. 3) or sometimes slightly 

 obovate, rounded at the base, usually short acuminate, 6 to 7.5 cm. 

 long, 2 to 4 f-rn. brojul, usiinlly not folding at tlvc base when 



