38 BULLETIN 179, V. S. DEPARTMENT OF AGRICXJLTUKE. 



calyx campanulate, sparingly hairy on the outer surface, the tube 

 about 2 mm. long, the lobes oblong or ovate-oblong and obtuse, 1.5 

 mm. long, the margin glandular, usually rather strongly pubescent 

 within, at least toward the base, apparently erect or spreading 

 at an thesis; petals obovate to oblong-obovate, 4 to 6 mm. long, 2.5 

 to 3 mm. broad, narrowed toward the base or sometimes more 

 abruptly contracted to a claw, entire or erose toward the apex. Fruit 

 riperdng in August or early September, globose or subglobose, 1.5 to 

 2 cm. in diameter, usually yellow overlaid with crimson on one side 

 or sometimes golden yellow with whitish dots, rarely entirely red, 

 bloom thin or wanting, flesh yellow and rather firm, quality usually 

 poor, but occasionally good; stone oblong (PI. X, figs. 13 to 22), 

 11 by 7 by 5 mm. to 13.5 by 10 by 7 mm., pointed at each end or 

 sometimes somewhat truncate at the base and rounded, but with an 

 abrupt point at the apex, irregularly grooved and ridged near the 

 ventral edge, indistinctly grooved along the dorsal edge, the surface 

 smooth or obscurely reticulate. 



Prunus reverchonii is a shrub usually 2 to 6 feet high; the bark of 

 the stem is gray, while that of the young twigs is chestnut or dull 

 reddish chestnut, turning to a dull gray the second year, or rarely 

 becoming grayish the first year; lenticels small, round, and lighter 

 colored. 



The species (fig. 2) forms very dense thickets on the black upland 

 soils and in the rich bottom lands along streams from Limestone 

 Gap and the vicinity of the False Washita in southern Oklahoma 

 southward to the Colorado in Texas. It probably does not occur 

 east of the ninety-sixth meridian, but its western limits are not 

 known. It has been collected along the Little Wichita, in Clay 

 County, on hiUs near the Concho Kiver, and in Lampasas County. 

 Fohage closely resembhng this has also been collected in the vicinity 

 of Fort Davis, in western Texas, but without flowers or fruit the 

 specimen can not be definitely referred to this species. 



Prunus reverchonii is closely related to P. rivularis and is sometimes 

 difficult to distinguish in the herbarium from that species. Addi- 

 tional material and study in the field may require it to be ranked 

 as a subspecies of the latter. The apparent differences are its more 

 branching and less slender stems, trough-shaped leaves, later ripening 

 fruit, and more pointed stone. It is generally regarded as of little 

 value horticulturaUy, but its adaptabihty to limestone soils and 

 abihty to withstand severe drought may make it of value as a dwarf 

 stock, if its habit of suckering is not too great an objection. The small 

 stone and the fact that occasional thickets are found producing fruit of 

 fair quahty suggest also that the fruit should not be entirely neglected. 

 One thicket on the Little Wichita River, west of Henrietta, Tex., 



