APRIL 1 TO JUNE 30, 1921. 



51 



53454 to 53462— Continued. 



53456. CoFFEA coNGENSis Froehii. 



A tree with fuscous gray slender branches and glabrous subcoriaceous 

 leaves, narrowly oval or elliptic; the fruits are oval. (Adapted from 

 Notizblatt des Konigliches Botanischen Gartens iind Museums zu Berlin, 

 v6l. 1, p. 235.) 



53457. CoFFEA DEWEVREi Wildeui. and Dur. 



This species requires no shade and some plants yield 16 kilograms 

 of berries in four months. From plants 34 to 38 months old, 8.3 kilo- 

 grams of fresh berries make 1 kilogram of coffee. (Adapted from Bul- 

 letin AgHcole du Congo Beige, vol. 7, p. 293. ) 



For previous introduction, sec S. P. I. No. .50631. 



53458. CoFFEA excelsa Cheval. 



A coffee which thrives from sea level to TOO meters, succeeds well on 

 rather stiff clayey soils, and is quite drought resistant; it might be 

 grown with an annual rainfall of 1,200 millimeters. It is the most 

 resistant to drought and blight of any coffee, is of strong vigorous 

 growth, and produces 1 kilogram of cotTee from 7 to 8 kilograms of 

 berries. Excelsa makes an excellent stock for other coffees. The first 

 crop is obtained at the age of 4 to 5 years and a full crop at the age of 

 7 to 8 vears. (Adapted from PhUippine Agricultural Review, vol. 9, 

 P- m.) 



For previous introduction, see S. P. I. No. 50632. 



53459. CoFFEA CANEPHORA KouiLOUENsis Pierre. 



A variety which yields 1 kilogram of coffee from 3.8 kilograms of 

 berries. The small leaves make very dense shado and prevent the cir- 

 culation of air, two causes which contribute to the development of the 

 coffee blight, Hemilcia rastatri.v. (Adap::ed from Bulletin Agricole du 

 Congo Beige, vol. 7, p. 296.) 



53460. COFFEA LIBERICA Bull. 



Among the Liberica types, Coffca libc7'ica is the only one that has 

 attained commercial importance. When first imported to Java this 

 coffee was resistant to the blight and it was extensively planted; dur- 

 ing recent years, however, a strain of the Hemileia has developed which 

 so severely injures the Liberica that its cultivation has practically been 

 abandoned. The yield averages 600 to 700 kilograms of coffee per 

 hectare. 



To produce 1 kilogram of marketable coffee, 10 kilograms of berries 

 are required. The Liberica coffee has a large, hard berry which requires 

 a special pulper. The Liberica coffee and all other closely allied varie- 

 ties or species prefer low altitudes, from sea level to an altitude of 350 

 meters. All the coffees of this type succeed well even on rather stiff 

 clayey soils and are quite drought resistant. (Adapted from Philippine 

 Agheultural Review, vol. 9, p. 121.) 



For previous introduction, see S. P. I. No. 51482. 



53461 and 53462. Coffea i^vrRENTii Wildem. 



(C. robusta Hort.) 



This variety was discovered in 1898 in the Kongo by Emile Laurent. 

 One of the chief features of this new variety seems to be its immunity 

 against disease. The plant grows very rapidly, and after eight months 

 shows its first flowers. A small harvest is obtained in the second year, 

 and the maximum production is reached in the fourth or fifth year. 

 Clusters are numerous and contain 50 to 60 berries, which require 10 

 months to ripen. To make 1 kilogram of marketable coffee, 9 kilograms 

 of the red berries are required. 



The following are the yields per hectare of two plantatione of C. 

 robusta in Java, one of exhausted and one of virgin soil : Exhausted 

 soil, second year, very little; third year, 485 kilograms; fourth year, 

 696 kilograms ; fifth year, 1,066 kilograms. Virgin soil, second year, little ; 

 third year, 556 kilograms ; fourth year, 1,657 kilograms. Trees properly 



