appeared in the middle of May of this very backward year, 
but no fruit has been formed; the leaves were not fully 
developed till the end of June. It need hardly be stated 
that the five-petalled variety is much more attractive than 
the four-petalled. 
Desor. A glabrous shrub, three to five feet high, with 
stout spreading terete smooth green shining branches, and 
strong straight thorns an inch long and upwards. Leaves 
appearing after the flowers, three-foliolate ; petiole about 
half an inch long, flattened ; leaflets elliptic, sessile, crenu- 
late, obtuse, emarginate, coriaceous, dotted with pellucid 
oil-glands ; lateral often oblique, about one inch, the 
terminal one and a half inch long. Flowers solitary in the 
axils of the spines, very shortly pedicelled, about one inch 
in diameter. Sepals four or five, small, oblong, concave, 
deciduous. Petals four or five, two-thirds of an inch 
long, obovate, almost clawed, concave, incurved, snow- 
white. Stamens eight, or ten, inserted in a thick annular 
pubescent disk, filaments flattened, connate at the base, 
reddish below the middle; anthers oblong. Ovary globose, 
two or more celled pubescent; and stigma very short, 
crenate ; ovules one in each cell. Fruit a small orange.— 
J.D. H. 
Fig. 1, Vertical section of flower; 2, stamen; 3, disk and ovary; 4, vertical 
section of the same ; 5, transverse section of ovary :—all enlarged. 
