According to Hecht, Levis, and Kahn's Report for 1879, Para rubber (Hevea) is still the largest source of supply. The total import into England during the year was 4,651 tons. Liverpool received 25 tons of Ceara Scrap rubber, and 900 tons of African (Landolphia), while London imported 350 tons from Assam (Ficus elastica), 250 tons from Borneo (Willughheia), and 550 from Mozambique (Landolphia). Considerable attention has been paid at Kew during the past year to the examination of the African Landolphias and Malayan rubber-yielding Willughbeias, and the results will be given in the next report. Owing to the unfailing interest in Kew of Dr. Kirk, H. B. M. Consul-General at Zanzibar, a considerable stock of Landolphias, of which in 1877 we had none in cultivation (Kew Report, 1877, p. 32), has been got together. Plants of one kind will be distributed to tropical colonial gardens in the course of the present year.

The following extracts from reports and other documents carry on the history of the introduction of the South American species into Old World cultivation (see Kew Report, 1878, pp. 14 and 15).