The most striking trees in the forest region are, in the basin of the Cavalla, the giant Funtumia elastica, which grows to an altitude of 200 ft.; various kinds of Parinarium, Oldfieldia and Khaya; the bombax or cotton tree, giant dracaenas, many kinds of fig; Borassus palms, oil palms, the climbing Calamus palms, and on the coast the coconut.
" Rambong " or Assam rubber is the produce of Ficus elastica, commonly known as the indiarubber tree and cultivated in Europe as an ornamental plant.
" Lagos " rubber is the produce of the African rubber tree Funtumia elastica, which is indigenous to Africa from Uganda to W.
The source of " Ule " rubber exported from Central America, and of the " Caucho " rubber of Peru is Castilloa elastica, Cerv., a lofty tree, N.
Several other species of Castilloa than C. elastica are known to furnish rubber, but little has been recorded as to their advantages.
Funtumia elastica (formerly known as Kickxia or Kixia elastica) is the W.
- Funtumia elastica (Lagos rubber).
Ficus elastica is the tree which produces Rambong or Assam rubber.
In Assam and in upper Burma there are extensive forests of Ficus elastica, but to a large extent the trees have been damaged by careless tapping.
Among other shrubs and vines which yield rubber of fair quality may be mentioned Willughbeia edulis and Urceola elastica and Parameria glandulifera, which occur in Burma and Malaya.
RUBBERS Para Ceara Castilloa Ficus Landolphia Para Latex Rubber Rubber Rubber Elastica Kirkii (Ceylon).
India-rubber is derived principally from the Hevea guayanensis, sometimes called the Siphonia elastica, which is found on the Amazon and its tributaries as far inland as the foothills of the Andes.
Rubber plantations have also been laid out, principally by American companies, the Castilloa elastica doing well.
Along the path of a particle, defined by the of (3), _ c) sine 2e, - x 2 + y2 = y a 2 ' (Io) sin B' de' _ 2y-c dy 2 ds ds' on the radius of curvature is 4a 2 /(ylc), which shows that the curve is an Elastica or Lintearia.
Brasiliensis, and the latter from the Castilloa elastica and some other varieties.
In this way the india-rubber tree (Ficus elastica), for example, and many other tender plants may be increased with the aid of a brisk bottom heat.
The product is derived from the Castilloa elastica, the Heveas not being found west of the Andes.
In the north-east of Assam and in the north of Upper Burma the Ficus elastica, a species of india-rubber tree, is found.
Ballivian, Apuntes sobre la industria de goma elastica, &c. (La Paz, 1896); Noticia Politica, Geogrdfica, Industrial, y Estadistica de Bolivia (La Paz, 1900); Breves Indicaciones Tiara el Inmigrante y el Viajero a Bolivia (La Paz, 1898); Monografias de la Industria Minera en Bolivia, three parts (La Paz, 1899-1900); Relaciones Geogrdficas de Bolivia existentes en el Archivo de la Oficina Nacional de Inmigracion, &c. (La Paz, 1898); M.