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H. nitida is a medium-sized, evergreen tree growing to 27 m (90 ft) with a slender trunk and branching crown. [2] The exception to this is the variety toxicodendroides, which is a shrubby form only growing to about 2 m (7 ft) tall. The leaves have three, drooping, elliptical leaflets, that are folded upwards at the midrib; both upper and lower ...
Hevea brasiliensis is a tall deciduous tree growing to a height of up to 43 m (141 ft) in the wild. Cultivated trees are usually much smaller because drawing off the latex restricts their growth. The trunk is cylindrical and may have a swollen, bottle-shaped base. The bark is some shade of brown, and the inner bark oozes latex when damaged.
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H. pauciflora is a small evergreen tree growing to a height of about 18 m (60 ft). The specific epithet pauciflora is Latin for 'few-flowered'. [2] [3] It is sometimes tapped for rubber production but the latex is low in quality, being mixed with much resin.
Hevea benthamiana is a species of rubber tree in the genus Hevea, belonging to the family Euphorbiaceae. A medium-sized deciduous tree growing to a height of about 27 m (90 ft), it is native to the rainforests of northern Brazil, Colombia and Venezuela.
Trees in this genus are either deciduous or evergreen. Certain species, namely H. benthamiana , H. brasiliensis and H. microphylla , bear "winter shoots", stubby side shoots with short internodes, scale leaves on the stem and larger leaves near the tip; on these, the leaves are shed leaving the tree bare before new shoots develop. [ 7 ]
Two main opposing forces affect a tree's height; one pushes it upward while the other holds it down. By analyzing the interplay between these forces in coast redwoods (Sequoia sempervirens), a team of biologists led by George Koch of Northern Arizona University calculated the theoretical maximum tree height or the point at which opposing forces balance out and a tree stops growing.
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