264 SMITH : 



Amherstia tiobilis and of Saraca indica were compared. Both 

 these trees belong to the group whose young foHage hangs 

 flaccidly downwards (see Keeble). In Amherstia nobilis the 

 young leaves are brownish-red in colour and are folded along 

 the midrib in the earlier stages. The anthocyan producing the 

 colouration is present in the spongy mesophyll. In the earlier 

 stages the chorophyll is very feebly developed, so that when the 

 anthocyan is dissolved by hot water the leaf becomes very 

 pale and almost white. The leaf of Saraca indica is smaller 

 and not folded, and in colour is almost white. It very often 

 contains no pigment other than a little chlorophyll, but faint 

 purplisli areas on the whitish ground are not uncommon. The 

 prevailing colour ought really to be described as a greenish- 

 white, for a very small amount of chlorojAyll is present and 

 gives a green tinge to the leaf. As the leaf grows older this 

 green tinge gets deeper, and by development of the chlorophyll 

 the leaf gradually changes first to a light green and then to a 

 darker green. The two leaves approach similarity as nearly as 

 possible, except in the matter of colour. They are both thin 

 and flaccid, and, as far as can be roughly judged by the eye, 

 have a similar development of chlorophyll. In both it is 

 almost absent in the earliest stages and gradually developes 

 later. The great difference is that in Amherstia nobilis 

 anthocyan is present, giving the leaf a deep brownish-red 

 colour, which disappears when the chlorophyll is developed, 

 and Saraca indica being without this colour is almost white in 

 the earlier stages, and gradually changes to green. 



Average of 7 = 11 • 9 C. ; average of 7 = 9- 9 C. 



