Edward Morell Holmes,
Encyclopædia Britannica, Ninth Edition…
“ In Sumatra the ground is cleared, ploughed, and sown with rice, and cuttings of the vine are planted in September 5 feet apart each way, together with a sapling of quick growth and rough bark. The plants are now left for twelve or eighteen months and then entirely buried except a small piece of bent stem, whence new shoots arise, three or four of which are allowed to climb the tree near which they are planted. ”
