ROSACEA. SILVA OF NORTH AMERICA. 151 
CRATAIGUS HARBISONI. 
Haw. 
STAMENS 20; anthers light yellow. Leaves oval to obovate, lustrous, subcoria- 
ceous, dark green, and scabrous above. 
Cratzgus Harbisoni, Beadle, Bot. Gazette, xxviii. 413 (1899).— Gattinger, Fl. Tennessee, 98. 
A tree, sometimes twenty-five feet in height, with a trunk ten or twelve inches in diameter covered 
with light gray or gray-brown fissured and scaly bark, and often armed with straight or much-branched 
spines, and stout wide-spreading light gray or reddish branches formmg a wide rather open and 
symmetrical head. The branchlets are slender, nearly straight or occasionally slightly zigzag, marked 
by large scattered oblong pale lenticels, and furnished with numerous usually stout straight dark 
red-brown lustrous spines from an inch and a half to two inches in length; when they first appear 
they are dark red-brown and coated with long spreading white hairs, and during their first summer 
they are pubescent or glabrous and light reddish brown or orange-brown, becoming light or dark 
gray during their second year. The leaves are oval or broadly obovate, acute at the apex, cuneate or 
full and rounded at the entire base, coarsely serrate above, with straight glandular teeth, roughened 
on the upper surface by stout rigid pale hairs and soft and pubescent below; nearly fully grown 
early in May when the flowers open, they are then thin, dark yellow-green above and pale below, and 
in the autumn they are thick and firm in texture, dark green and lustrous on the upper surface, pale 
on the lower surface, from two inches to two inches and a half long and from an inch to an inch and 
a half wide, with stout midribs and primary veins deeply impressed on the upper side of the leaf, and 
conspicuous reticulate veinlets; they are borne on stout villose petioles more or less winged above, 
furnished like the base of the leaf-blade with numerous large stipitate dark glands, and from one 
quarter to one half of an inch in length. The stipules are acute, straight or falcate, and conspicuously 
glandular-serrate. On vigorous leading shoots the leaves are often broadly ovate, cuneate and decurrent 
below on their stouter petioles, three or four inches long and from two inches and a half to three 
inches wide, and their stipules are lunate, coarsely glandular-dentate, and frequently half an inch in 
length. The flowers are three quarters of an inch in diameter, and are produced in broad loose long- 
branched compound many-flowered villose corymbs, with broad acute glandular-serrate bracts and 
bractlets. The calyx-tube is broadly obconic, densely villose at the base and glabrous or pubescent 
above, and the lobes are foliaceous, elongated, gradually narrowed from broad bases, acute, bright 
green, more or less villose, and coarsely glandular-serrate, with large stipitate dark red glands. There 
are usually twenty or from ten to twenty stamens with elongated filaments and large light yellow 
anthers, and from three to five styles. The fruit ripens and falls early in October, and is subglobose 
but often rather longer than broad, bright red or orange-red, and marked by numerous large dark 
dots; the calyx is enlarged with a broad shallow cavity and wide-spreading glandular lobes which 
often fall before the fruit ripens; the flesh is yellow, thick, dry, and mealy. The nutlets vary from 
three to five in number, and are thin, rounded and sometimes prominently ridged on the back, and 
about a quarter of an inch in length. 
Crategus Harbisoni inhabits the dry limestone hills and ridges of West Nashville, Tennessee, 
