NATIVE AMERICAN SPECIES OF PRUNUS. 45 
Prunus angustifolia watsom is very difficult to distinguish from 
the species in the herbarium, but the leaves appear to be less pointed, 
slightly less minutely serrate, and the serrations less deep in propor- 
tion to their length, with the glands less often near the center of the 
teeth but frequently even in the lowest part of the indentation. In 
the field, the form usually appears even more shrubby, the branches 
more zigzag, and the fruit usually ripens later. A few specimens 
from southwestern Kansas and one from New Mexico are unusually 
pubescent, but they do not differ otherwise. 
The fruit is often gathered in considerable quantities in many 
localities and is sometimes sold in the markets. This form is also 
sometimes grown in small orchards in Kansas. Among the named 
varieties which appear to belong to the subspecies, Purple Pan- 
handle, Red Panhandle, Yellow Panhandle, and Quitique have come 
from the Panhandle region of Texas. Other varieties are Straw- 
berry and Welcome. These plums are said to appear promising in 
their native region, but they proved disappointing when brought to 
Austin, Tex., where some of them were introduced to the trade. 
Nevertheless, the form should not be lost sight of in any comprehen- 
sive effort to improve the native species. 
PruNuS ANGUSTIFOLIA WATSONI HyBribs. 
There is little doubt that the form known as the Utah hybrid, x 
Prunus utahensis has this subspecies for one of its parents. It is 
also supposed to hybridize with P. americana, and these hybrids are 
discussed under P. besseyz and P. orthosepala, respectively. 
Prunus ANGUSTIFOLIA VARIANS Wight and Hedrick. 
Prunus angustifolia varians Wight and Hedrick, in Hedrick, 1911, The Plums of 
New York, p. 87. 
Leaves oblong-oval, oval-lanceolate, or rarely slightly obovate- 
lanceolate, mostly 3.5 to 6 cm. long, 2 to 2.5 cm. broad, gradually 
narrowed at the base, acute at the apex, the margin very minutely 
_ glandular serrate, glabrous and somewhat lustrous above, slightly 
pale, glabrous or sparingly hairy along the midrib and in the axils of 
the lateral veins on the lower surface; the slender petioles usually 
reddish, 10 to 15 mm. long, pubescent along the upper side, eglandular 
or sometimes with one or two glands at the apex; stipules 3 to 4 mm. 
long, linear, and glandular dentate. Flowers, appearing from early 
in March and before the leaves in the South to the middle of April and 
with the leaves in the North, in dried specimens 10 to 12 mm. broad; 
pedicels 7 to 9 mm. long, glabrous; calyx campanulate, the tube 2 to 
2.5 mm. long, glabrous, the lobes usually shorter than the tube, oblong 
and obtuse, glabrous on the outer surface, glabrous or sometimes 
sparingly pubescent on the inner, the margin ciliate, eglandular; 
