IN CEYLON. 
87 
varying length. I have not met with these multicellular 
glands on the calyx of any other species, though they occur 
abundantly over the carpellary wall of D. Embryopteris 
(pi. XIX., figs. 10-11). 
The calyx usually persists on the ripe fruits, but in many 
of those which form deep cups the fruits seem to become 
detached and the calyx is left on the twig. 
The general characters of the calyx segments and the 
ferrugineous hairs with which they are very often coloured 
are, according to Hallier,*' of systematic importance and 
comparable to similar structures in the Pittosporaceæ. 
The same botanistf also calls attention to the fact that in 
Scytopetalum the segments of the small calyx cannot be 
distinguished, and suggests an affinity with the Ebenaceæ. 
We have seen that in D. oocarpa particularly, and also to a 
less marked extent in D. Toposia, the calyx segments are 
often undistinguishable. 
Corolla .—The segments are united and usually, though 
by no means always, isomerous with those of the calyx. 
The colour is yellow, white, or greenish. The tube and 
segments are often covered with silky or brown hairs, 
sometimes on the outside only, at other times on both sides. 
The margin of the segments in species like D. hirsuta is 
very hairy. The segments are usually equal, and according 
to HiernJ are contorted sinistrorsely in aestivation as 
regarded from inside, except D. oocarpa, in which the 
aestivation is variously imbricated. The corolla is occa¬ 
sionally very conspicuous, as in D. Embryopteris and 
D. Ebenum, but most usually is small and unattractive, as 
in D. Toposia and D. attenuata. The segments may be 
relatively long, as in D. pruriens, or very short as in 
D. Toposia. 
For convenience we will distinguish two types of corolla. 
The first type comprises all those in which the corolla 
* Halber, l.c p. 38. f Halber, l.c., p. 36. J Hiern, l.c., p. 60. 
