ROSACEZ. SILVA OF NORTH AMERICA. 125 
CRATAGGUS LUCORUM. 
Red Haw. 
STaMENS 20; anthers dark purple. Leaves broadly ovate to oval, membranaceous, 
dull dark green. 
Cratzegus lucorum, Sargent, Bot. Gazette, xxxi. 227 (1901). 
A tree, from twenty to twenty-five feet in height, with a tall straight stem six or eight inches in 
diameter covered with close dark red-brown bark, and slender ascending branches forming a narrow 
open head. The branchlets are thin, zigzag, marked by many oblong pale lenticels, and occasionally 
armed with straight or slightly curved bright red-brown lustrous spines from an inch to an inch and a 
half in length ; dark green and somewhat villose when they first appear, they become dull orange-brown 
in their first summer, and ultimately dark gray-brown. The leaves vary from broad-ovate to obovate or 
rarely to oval, and are acute or acumimate at the apex, gradually narrowed and broadly cuneate or full 
and rounded at the entire base, coarsely serrate above, with straight teeth tipped with large persistent 
bright red finally dark glands, and deeply divided above the middle into three or four pairs of wide 
acute or acuminate lobes; in early May when the flowers open they are more than one third grown and 
are then hight yellow-bronze color, covered on the upper surface with short soft pale hairs and glabrous 
on the lower surface, and in the autumn they are membranaceous, smooth, dark dull green and glabrous 
above, pale yellow-green below, about two inches long and an inch and a quarter wide, with slender 
yellow midribs only slightly impressed on the upper side and three or four pairs of thin primary veins 
extending obliquely to the points of the lobes; they are borne on slender glandular petioles often some- 
what winged toward the apex and from an inch to an inch and a half in length. The stipules vary 
from linear-lanceolate to oblanceolate and are glandular-serrate, from one quarter to one half of an inch 
in length, and caducous. On leading vigorous shoots the leaves are usually ovate and rounded at the 
broad base, more deeply lobed than the leaves of fertile branchlets, and sometimes three inches long 
and broad. The flowers are three quarters of an inch in diameter and are produced on thin pedicels, 
in narrow compact few-flowered thin-branched small villose corymbs, with narrow acuminate finely 
glandular-serrate caducous bracts and bractlets. The calyx-tube is broadly obconic and glabrous, and 
the lobes are narrow, acuminate, coarsely glandular-serrate, villose on the upper surface, and reflexed 
after the flowers open. There are twenty stamens with slender filaments and small dark purple anthers, 
and four or five styles. The fruit, which ripens about the middle of September and soon falls, is borne 
in erect few-fruited slightly villose clusters, on short stout pedicels; it is pear-shaped until nearly fully 
grown, and at maturity it is oblong or somewhat obovate, full and rounded at the ends, crimson, 
lustrous, marked by small pale dots, and from one half to five eighths of an inch in length; the 
calyx-cavity is deep but narrow and the lobes are elongated, coarsely glandular-serrate, villose above, 
spreading and closely appressed, and often deciduous before the fruit ripens ; the flesh is thick, yellow, 
dry, and mealy. The four or five nutlets are thin, rounded and sometimes obscurely ridged on the back, 
and about a quarter of an inch long. 
Crategus lucorum grows in rich moist soil along the margins of Oak groves on the banks of 
sloughs near Barrington, Illinois, and was probably first collected in May, 1899, by Mr. K. J. Hill. 
