1778 



A TEXl'BOOK OF THEORETICAL BOTANY 



cooler climates than the former species. The sugar content of these fruits 

 is relatively low, being less than 6 per cent. Several other species are 

 cultivated in the countries in which they are native. 



Fig. 1669. — Eiiiienia jauibos. Flower 

 in longitudinal section. {After 

 Fig. i66S.—Psidinm gttajava. Guava. Shoot Baillou.) 



with fruits. Photograph supplied by 

 courtesy of the Florida Agricultural Ex- 

 periment Station. 



In the genus Pimenta the most important species is P. officinalis. The 

 unripe fruits of the plant if dried rapidly yield Allspice, which consists of 

 small, dark brown berries used in flavouring. 



There are a number of important species included in the genus Eugenia, 

 probably the best known being E. caryop/iyllata, the young flower buds 

 of which are collected and dried to produce the Cloves of commerce. 

 E. uniflora is the Pitanga, which is a native of Brazil and forms in that 

 country the equivalent of the European Cherry. E. jambolana, the 

 Jambolan, is cultivated in the East Indies and is often referred to as the 

 Java Plum. E. jamhos (Fig. 1669) is the Rose Apple which forms an orna- 

 mental tree in the tropics. The flowers are white and are produced in 

 racemes. The fruits are about an inch and a half in diameter and apricot 

 yellow in colour. They contain nearly 12 per cent, of the dry weight as 

 sugars. The plant is indigenous in the East Indies but has been extensively 

 planted. E. malaccensis, the Otaheite Apple, is a native of Malaya, but has 

 been introduced into Hawaii and now constitutes one of the most important 

 species. The fruits are oval and 2 to 3 in. long. The flesh is crisp and apple- 

 like with a refreshing sub-acid flavour. About 7 per cent, of the dry weight 

 is sugar. E. uniflora is the Surinam Cherry (Fig. 1670). 



The genus Eucalyptus, with 230 species, is almost entirely restricted to 



