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The species to be described belong to ten families, and will be given in the following order: Bignoniaceae, Polemoniaceae, Leguminosae, Compositae, Smilaceae, Fumariaceae, Cucurbitaceae, Vitaceae, Sapindaceae, Passifloraceae. BIGNONIACEAE. This family contains many tendril-bearers, some twiners, and some root-climbers. The tendrils always consist of modified leaves.
The Smilaceae no doubt abound on the banks of the Rio Negro, the Pacimony, and the Cababury; their roots, macerated in the water, yield an extractive matter, that is brown, bitter, and mucilaginous; but how many tufts of smilax have we seen in places, where the waters were entirely white.
The tendrils retain their sensibility to an unusually late age; for one borne by a leaf with five or six fully developed leaves above, was still active. If a tendril catches nothing, after a considerable interval of time the tips of the branches curl a little inwards; but if it clasps some object, the whole contracts spirally. SMILACEAE. Smilax aspera, var. maculata. Aug.
POLEMONIACEAE Cobaea scandens much branched and hooked tendrils, their manner of action LEGUMINOSAE COMPOSITAE SMILACEAE Smilax aspera, its inefficient tendrils FUMARIACEAE Corydalis claviculata, its state intermediate between that of a leaf-climber and a tendril-bearer. By tendrils I mean filamentary organs, sensitive to contact and used exclusively for climbing.
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