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We have seen that such discs are formed by two species of Bignonia, by Ampelopsis, and, according to Naudin, by the Cucurbitaceous genus Peponopsis adhaerens. In Anguria the lower surface of the tendril, after it has wound round a stick, forms a coarsely cellular layer, which closely fits the wood, but is not adherent; whilst in Hanburya a similar layer is adherent.