Hevea


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Hevea

[′hē·vē·ə]
(botany)
The rubber tree genus of the order Euphoriales from which the largest volumes of latex are harvested for use in the manufacture of natural rubber.

Hevea

 

a genus of evergreen monoecious trees of the Euphorbiaceae family.

There are approximately 12 species of Hevea, found in the forests of tropical America. H. brasiliensis is the principal source of natural rubber; it grows wild in the damp tropical forests of the Amazon valley and is widely cultivated in tropical countries (most notably in Ceylon, the Malacca Peninsula, and the Greater Sunda Islands). The height of the tree is 30-40 m; the leaves are compound ternate and the blossoms small, unisexual, and gathered into paniculate inflorescences with capsular fruit. The seeds are oval and large (up to 3 cm) with a heavy brown casing, and quickly lose their germinating capacity. The milky sap of the plants contains the rubber, for which the trees are tapped from the age of 10-12 years. One tree may yield from 3-4 to 7.5 kg of rubber per year.

REFERENCES

Tekhnologiia rastitel’nogo kauchuka i guttaperchi. Moscow, 1944.
Zhukovskii, P. M. Kul’turnye rasteniia i ikh sorodichi, 2nd ed. Leningrad, 1964. Pages 760-63.
Siniagin, I. I. Tropicheskoe zemledelie. Moscow, 1968. Pages 245-53.

S. S. MORSHIKHINA

References in periodicals archive ?
Coagulation of natural rubber from the latex, with ionic liquids Efficient coagulation of Hevea latex was obtained at 25[degrees]C just mixing the latex with an equal amount or slight excess (by mass) of IL.
This oversight is more perplexing given that Part 4 on hevea cultivation focuses heavily on plantations in French Indochina, which supplied rubber for Michelin.
This new genome data is expected to facilitate development of improved breeding technologies and growing methods for Hevea brasiliensis/natural rubber.
The Bridgestone Group (the Group)has been conducting basic research into molecular breeding of Hevea brasiliensis to enhance the productivity of natural rubber.
Jayaratne AHR, Peries OS, Waidyanatha UPDS (1986) Effect of vesiculararbuscular mycorrhizae on seedlings of Hevea and Pueraria phaseoloides.
I mean, she's a good dog and all, but she doesn't need a hand-painted Hevea Tree rubber giraffe.
In 1876, Henry Wickham, a ne'er-do-well British wanderer, smuggled 70,000 Hevea seeds from the Amazon to Kew Gardens, a service for which he received a knighthood from Queen Victoria.
The Territory of Acre was rich in lovely specimens of Hevea brasiliensis [rubber trees], and would exist for many years under the sign of equivocation.
Hevea brasiliensis is considered by many to be the most important member of the Euphorbiaceae family because its latex has been used in all parts of the world.
Chromium (VI) adsorption from aqueous solution by Hevea brasilinesis sawdust activated carbon.
Hevea brasiliensis, or para rubber, its botany, cultivation, chemistry and diseases, 2nd ed.
This exudate of the Hevea Brasiliensis tree was already being used by South American natives when European explorers arrived.