...He ate fruits andberries and tubers that he dug from the earth with his fingers... 
Edgar Rice Burroughs 「Tarzan the Terrible」
...This plant is an herbaceous creeper, and deposits under ground a number of tubers, some as large as a man's head, at spots in a circle a yard or more, horizontally, from the stem...
David Livingstone 「Missionary Travels and Researches in South Africa」
...abounds in three varieties of grape-bearing vines, and one of these is furnished with oblong tubers every three or four inches along the horizontal root...
David Livingstone 「Missionary Travels and Researches in South Africa」
...He also digs up bulbs and tubers, but none of these are thoroughly digested...
David Livingstone 「Missionary Travels and Researches in South Africa」
...It isnocturnal in its habits, and in the vicinity of cultivation does muchdamage to such garden stuff as consists of tubers or roots...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...The tubers, on the other hand, present a wonderful amount of diversity...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The tubers also differ in smoothness and colour, being externally white, red, purple, or almost black, and internally white, yellow, or almost black...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...As with many other plants which have been long propagated by bulbs, tubers, cuttings, &c...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Several varieties, even when propagated by tubers, are far from constant, as will be seen in the chapter on Bud-variation...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Some of these united tubers produced white, and others blue tubers; and it is probable that in these cases the one half alone of the bud grew...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...They have inexceptional perfection the power of discovering the tubers on whichtheir larvæ are nourished...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...When the late berries and fruits were all gonethere were sweet tubers and starchy roots to be grubbed up along themeadow levels by the water...
Charles G. D. Roberts 「The Watchers of the Trails」
...Then in about another two months the men replant the smaller tubers, while the largerones are retained for food...
Robert W. Williamson 「The Mafulu」
... woody looking tubers that seemedto have been freshly uprooted! There was a good chance...
Various 「Astounding Stories, April, 1931」
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