Tendrils which have
caught nothing simply bend downwards and inwards, like the
extremities of the leaves of the Corydalis claviculata. But in all
cases the petiole after a time is angularly and abruptly bent
downwards like that of Eccremocarpus.
CHAPTER IV.--TENDRIL-BEARERS--(continued).
CUCURBITACEAE.--Homologous nature of the tendrils--Echinocystis
lobata, remarkable movements of the tendrils to avoid seizing the
terminal shoot--Tendrils not excited by contact with another tendril
or by drops of water--Undulatory movement of the extremity of the
tendril--Hanburya, adherent discs--VITACAE--Gradation between the
flower-peduncles and tendrils of the vine--Tendrils of the Virginian
Creeper turn from the light, and, after contact, develop adhesive
discs--SAPINDACEAE--PASSIFLORACEAE--Passiflora gracilis--Rapid
revolving movement and sensitiveness of the tendrils--Not sensitive
to the contact of other tendrils or of drops of water--Spiral
contraction of tendrils--Summary on the nature and action of
tendrils.
CUCURBITACEAE.--The tendrils in this family have been ranked by
competent judges as modified leaves, stipules, or branches; or as
partly a leaf and partly a branch.
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