24 BULLETIN 30, POETO RICO EXPERIMENT STATION. 
the leaves are narrower, and the internodes are shorter, giving to the 
whole a more densely foliated effect. (PL IX, fig. 1.) 
Representative leaves are 8-J to 9J inches long and from less 
than 3 to 3J inches wide, the length of some being more than three 
times the width. The average internodal length on laterals varies 
from 2 to 3 inches. 
The first planting produced a. few cherries in the fourth year 
from seed. The subsequent crops are given in Table 6 and the season 
of maturity in Table 1. C. quillou ripened slightly earlier than did 
G. robusta, but the fruiting habit of the two is similar. The cherries 
of G. quillou are a lighter red than those of 0. robust a, and some are 
solid colored while others are striped. They are also less rounded 
and slightly smaller. Counts of four samples showed between 640 
and 726 cherries per liter. The skin is very thin and the yield of 
marketable coffee to the almud of cherries was the highest of any 
variety tested, both as to the amount of coffee and proportional 
reduction in weight. Two almuds of cherries weighed 29 pounds 
9 ounces and 31 pounds 6 ounces, respectively. After being pulped 
and dried, the latter yielded 8 pounds of marketable coffee, a reduc- 
tion in weight in the ratio of 3.9 to 1. Two pounds were found to 
contain 3,128 and 3,159 beans, respectively. The bean is less rounded 
than that of G. robusta, being proportionally longer and in some 
cases rather pointed. Unless the closely adhering brown silver skin 
is thoroughly removed, the bean presents an unattractive appear- 
ance. Where the robustoid coffees are to be planted, this variety 
would seem worthy of trial. 
Coffea Uganda Hybrid. 
Seed of this hybrid was received from the Java Experiment 
Station, where this variety is considered the best of the robustoid 
coffees for the less favorable soils. From seed planted in November,. 
1916, a small planting was set two years later. Both growth and 
production have been satisfactory, but the planting is small, and too 
young as yet to permit of the drawing of definite conclusions. The 
leaves are considerably smaller than those of Robusta, being 7 to 8 
inches long by 3 to 3J inches wide. In shape they are generally 
oval, but there is some variation between individuals. The cherry 
is either striped or solid in color and is on a rather long pedicel* 
like that of the Arabian. The produce of one individual differs from 
that of another in both size and shape of bean. 
Coffea Congensis Hybrids. 
Doctor Cramer, who supplied the station with seed of G. congensis, 
does not include it in the Robusta group, stating in his letter of 
transmittal that " 0. canephora enters into the group of G. robusta. 
C. congensis and its varieties come nearer to G. arabica" He also 
says that " G. congensis var. chalotii is probably a hybrid of G. con- 
gensis with G. canephora." 3 * 
Inasmuch as the two plantings at the station, the first from seed 
received as G. congensis and the second as G. congensis var. chalotii, 
• ' i 1 ; — : ! 1 i i 
88 Coffees of the Dutch East Indies. Dr. P. J. S. Cramer. Tea and Coffee Trade Jour. 
(1919), vol. 36, No. 2, p. 120. 
