_Adlumia cirrhosa_.—I raised some plants late in the summer; they formed very fine leaves, but threw up no central stem. The first-formed leaves were not sensitive; some of the later ones were so, but only towards their extremities, which were thus enabled to clasp sticks. This could be of no service to the plant, as these leaves rose from the ground; but it showed what the future character of the plant would have been, had it grown tall enough to climb. The tip of one of these basal leaves, whilst young, described in 1 hr. 36 m. a narrow ellipse, open at one end, and exactly three inches in length; a second ellipse was broader, more irregular, and shorter, viz., only 2½ inches in length, and was completed in 2 hrs. 2 m. From the analogy of _Fumaria_ and _Corydalis_, I have no doubt that the internodes of Adlumia have the power of revolving. _Corydalis claviculata_.—This plant is interesting from being in a condition so exactly intermediate between a leaf-climber and a tendril-bearer, that it might have been described under either head; but, for reasons hereafter assigned, it has been classed amongst tendril-bearers. Besides the plants already described, _Bignonia unguis_ and its close allies, though aided by tendrils, have clasping petioles. According to Mohl (p. 40), _Cocculus Japonicus_ (one of the Menispermaceæ) and a fern, the _Ophioglossum Japonicum_ (p. 39), climb by their leaf-stalks. * * * * * We now come to a small section of plants which climb by means of the produced midribs or tips of their leaves.