136 THE VOYAGE OF H.M.S. CHALLENGER. 



eriocarpa from the Sandwich Islands, Dodoncea thunbergiana from South Africa, and one 

 or two Mexican ones, which, whether varieties or species, do not occur in Australia. 

 Whatever the rank of these forms, they all belong to the same type, which is also 

 abundantly represented in Australia, where there are upwards of forty other species, 

 exhibiting a great diversity in their foliage, flowers, and fruits, though many of them are 

 difficult of discrimination. One large section has pinnate leaves, while in others they are 

 long and slender like those of a pine, or short and slender like those of a heath. 



Dodoncea riscosa is one of those plants that thrive on the sea-coast as well as inland, 

 and in almost any soil or situation. 



ANACARDIACE^E. 

 Mangifera spp. 



Letti ; Timor Laut. — Specimens of two or three species of this essentially Malayan 

 genus were collected, but they have not been identified. Mangifera indica, the Mango, a 

 native of Tropical India, is commonly cultivated there as well as in other hot countries. 



Buchanania angustifolia, Eoxb. var. 1 



Buchanania angustifolia, Eoxb. var. ? Hook, f., El. Brit. Ind., ii. p. 23 ; Benth., Fl. Austr., i. p. 490. 



Arrou. — As limited by Mr Bentham, Buchanania angustifolia would perhaps include 

 this plant ; but Sir Joseph Hooker states that the Malayan and Australian forms present 

 some essential differences. 



Buchanania arborescens, Blume ? 



Buchanania arborescens, Blume? Miq., Fl. Ind. Bat., i. 2, p. 636. 



Barar. — The typical form is restricted to the Archipelago, and the present one may be 

 specifically different. There is a third undetermined species collected in Arrou by Mr 

 Moseley. The genus is almost exclusively restricted to Tropical Asia, one species only 

 being known from Australia, and one or two from the Fiji Islands. 



Semecarpus heterophyllus, Blume. 



Semecarpus heterqphyllus, Blume; Miq., Fl. Ind. Bat., i. 2, p. 62,J. 



Timor Laut. — This may be different from the Java and Sumatra Semecarpus hetero- 

 phyllus, the use of the fruit of which is said to cause swelling and eruptions. The genus 

 is restricted to Tropical Asia, except the common Semecaipns anacardium, which extends 

 to North Australia. 



