Havea

subsp. var.
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Standard Cyclopedia of Horticulture

Havea (from the Brazilian name). Euphorbiaceae. Tropical trees; some yield rubber and are cultivated for that reason. Juice milky: lvs. alternate, long-petioled, the 3 lfts. entire: fls. small, monoecious, in loose panicles; calyx valvate, 5-lobed or 5-toothed; petals none; stamens 5-10, filaments united into a column; ovary 3-celled, 1 ovule in each cell: fr. a large caps.; seeds about 1 in. long.—About 17 species chiefly in the Amazon region. The milky juice of some species is rich in caoutchouc, and they are among the most important sources of rubber; otherwise rarely cultivated except in economic and botanical collections. H. braziliensis, especially var. janeirensis, Pax, is the chief source of the South American or Para rubber. The various species are closely related and difficult to separate. The rubber plant commonly cultivated as a house-plant is Finis elastica. Damp, hot climates, such as the tropical rain forest region, without a dry season, are best suited for the culture of hevea, though it will stand some drought. It is best grown from seeds, but can be propagated by cuttings. The seed should be planted as soon as ripe, as they live but a short time. The trees grow rapidly, and attain their full height of 60 feet in about eight years, but live for many years longer. A six-year-old tree will yield as much as a pound of rubber a year and more when older. For further directions on culture, see "Cyclopedia of American Agriculture," Vol. II, p. 555. See M. T. Cook, "Diseases of Tropical Plants, p. 191, for rubber plant diseases. The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

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References

• Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963

External links

• w:Havea. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
• Havea QR Code (Size 50, 100, 200, 500)