Chap. U. ADLUMIA. 77 



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 2^ 

 inches in length, and was completed in 2hrs. 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 Menispermacea3) 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. 



