APPENDAGES OF THE STEM. 153 



additional member of a plant. Leaves there are, 

 however, which have a peculiar organisation, as those 

 of Phyllanthus and Brybphyllum, (Figs. 48 and 49,) 



Fig. 48. 



Leaf of a Phyllanthus^ showing the flowers borne on the edges. 

 Fig. 49. 



Leaf of a Bryophyllum, bearing viviparous progeny. 



the branched petioles of which are the peduncles 

 of the flowers, or the runners for bearing the 

 viviparous progeny of the plant. There are other 

 bracteous leaves similarly organised, as Echeveria 

 livida, which, if only laid on moist soil, readily strike 

 root, and produce new plants. The leaves of Gloxinia 

 produce young plants. A callosity is first formed from 



