6 
Journal of Agricultural Research 
Vol. I, No. i 
III. Kweichow Province. 
Kweiyang Prefecture.— K*ai Chow (?) (60 km. [37 miles] north-northeast of 
Kweiyang. Altitude 5,577 ft.), M. CavaeeriE, no date, young fruit, Paris (Museum). 1 
DETAILED DESCRIPTION OF CITRUS ICHANGENSIS 
The typical Citrus ichangensis as it occurs in southwestern China is 
a small tree or a large shrub, usually 5 to 15 feet high (1.5 to 5 meters), 
but sometimes reaching 20 feet. It also occurs wild in fruiting condi¬ 
tion only 2 to 3 feet high on the cliffs of the Yangtze Gorges. 
Fig. 6. —Citrus ichangensis-. Flowering branch of dwarf wild form; E. H. Wilson 
No. 2230A; natural size. (Drawn by Theo. Holm.) 
The twigs of the current growth are 2 to 4 mm. in diameter and con¬ 
spicuously angled, as is common in Citrus. The spines are straight, 
usually 1 to 2 cm., sometimes 2 to 3 cm. long, and 2 to 3 mm. in diameter 
at the base; they occur singly at one side of the axillary buds. (PI. I 
and figs. 6 and 7.) Some specimens have very small spines or none at all. 
A few nodes at the base of the twig are often spineless. 
The leaves are long and slender and remarkable because of the size of 
the winged petiole, which is sometimes larger than the blade. The leaves 
1 All of the specimens in this list have been studied by the writer and most of them have been photo¬ 
graphed, so all are to be considered as truly paratypic. 
