Excerpt:
Cryptostegia grandiflora R. Br. is a foliose tropical vine which bears a latex rich in rubber. The rubber can be obtained by cutting the long whiplike shoots or tapping the bark of the main trunk and collecting the latex which exudes. Recent work in this laboratory (Whittenberger, Brice, and Copley) has shown that the leaves of the plant also contain considerable quantities of rubber,which is localized in globules within the protoplasm of the chlorenchyma.
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