334 



ZONES AND REGIONS 



[Pt. Ill, Sect. I 



Stahl, who has closely studied pendent leaves and pendent shoots, 

 mentions the occurrence of pendent leaves in Monstera deliciosa, Mangi- 

 fera indica, Theobrorna Cacao, Durio zibethinus, Ouercus glaberrima, Acer 

 laurifolium, in fact in trees of very diverse affinities. On the other hand, 

 to both Stahl and m\-self pendent twigs are known in connexion with the 

 Caesalpiniaceae alone — in Amherstia nobilis, species of Brownea, Jonesia, 

 Maniltoa, Humboldtia, Cynometra. 



Fig. 176. Amherstia nobilis. Twig with pendent young lateral twigs. Botanic g.arden 

 at Buitenzorg. From a photograph by Treiib. 



Pendent leaves and pendent twigs b}' no means occur in the majority 

 woody plants of the virgin forest, but only in a minority of species, to whicl 

 however a number of economic and ornamental trees belong, so that th'l 

 phenomenon is generally striking. j 



In many cases the mode of development- of shoots does not diffel 

 essentially from that of woody plants of temperate zones. But the proj 

 tection of young members is possibly more frequently observable than i 

 temperate zones, whether it consists of a rich coating of hairs, a vertical li 

 of the leaves, or of their production under cover of the older foliage. Man 



