62 SILVA OF NORTH AMERICA. ROSACES. 
it is nearly fully ripe; and at maturity late in October it is subglobose but rather broader than it is 
long, barely angled, with a deep depression at the insertion of the stalk, from one half to five eighths 
of an inch in diameter, dark purple-red marked by numerous small pale dots, and very lustrous after 
the bloom has worn off ; the calyx is prominent, with a long well-developed tube, a broad deep cavity, 
and enlarged usually erect lobes which often disappear before the fruit ripens ; the flesh is thick, light 
yellow, sweet, dry, and mealy. The five nutlets are light-colored, deeply grooved on the back, and a 
quarter of an inch long.’ 
Crategus pruinosa grows on the slopes of low hills often in limestone soil, and is distributed from 
southwestern Vermont southward to the foothill region of the southern Appalachian Mountains, 
where it sometimes ascends to elevations of twenty-five hundred feet above the sea-level, and westward 
to central Illinois and central Missouri. First described nearly eighty years ago from plants cultivated 
in Europe, this beautiful and distinct species, which is now known to be one of the commonest and 
most widely distributed Thorn-trees of the eastern states, has until recently been confounded with 
Crategus coccinea by American botanists. 
1 The plate of this species is made from specimens of a tree Arboretum, where it was raised from seeds given to me by Dr. 
which has been growing for more than twenty years in the Arnold Asa Gray without indication of their origin. 
EXPLANATION OF THE PLATE. 
Puate DCXLVIII. Crataevus prurnosa. 
1. A flowering branch, natural size. 
2. Vertical section of a flower, enlarged. 
3. A fruiting branch, natural size. 
4. Vertical section of a fruit, natural size. 
5. Cross section of a fruit showing the nutlets, natural size. 
