Note 37 — Chapter XI
Reading edition
The following are the chief rubber-producing trees: Siphonia elastica, or Hevea brasiliensis, Amazon forests, yields Pará rubber; Manihot Glaziovii, also a tapioca-producing shrub, Ceará province, Brazil, furnishes Ceará rubber; Castilloa elastica, Central American States, Nicaragua rubber; Ficus elastica, British India, and Urceola elastica, Borneo, Indian rubber. There are rubber-producing trees in Florida, but they have little commercial value at the present time. African rubber is taken from a variety of plants.