118 ANOMALIES AND TRANSFORMATIONS OF LEAF-BUDS. 



leaves, as in Bryophyllum calycinum and Malaxis paludosa (fig. 231^, 

 and on the surface of leaves, as in Ornithogalum thyrsoideum (fig. 232). 

 These are capable of forming independent plants. Similar buds are 

 also made to appear on the leaves of Gesnera, Gloxinia, and Achimenes, 

 by wounding various parts of them, and placing them in moist soil ; 

 this is the method often pursued by gardeners in their propagation. 

 The Ipecacuan plant has been propagated by means of leaves inserted 



Fig. 232. Fig. 233. 



in the soU. In this case the lower end of the leaf becomes thickened 

 like a corm, and from it roots are produced, and ultimately a bud and 

 young plant, as shown in fig. 233. The cellular tissue near the surface 

 of plants seems therefore to have the power of developing abnormal leaf- 

 Fig. 231. Extremity of a leaf, I, of Malaxis paladosa, the margin of which is covered with 

 adventitious bnds, h i ; thus becoming proliferous. Fig. 282. Portion of the blade of a 

 leaf, /, of Ornithogalum thyrsoideum, on the surface of which are developed adventitious 

 or abnormal buds, 6 6 6 J, some of which are large. Fig. 233. Ipecacuan leaf, with petiole, 

 annulated root, and young plant, a. Lamina or blade of leaf, h, Petiole or leaf-stock, 

 c, Swelling at the end of the petiole after being placed in the soil, d. Root proceeding from 

 the swelling, showing an annulated form, e. Young plant arising from the swelling of the 

 petiole. 



