354 WILLIS : MORPHOLOGY OF THE PODOSTEMACBÆ 
gathered from dry rocks, and has completely fimbriate 
thalli without thin margins. Others again have been 
collected quite early, and show the process only in its early 
stages, and so on. 
The floral shoot develops from the vegetative, as in 
D. dichotoma or elongata, but does not become so much 
lengthened. The basal sheathing parts of the leaves, which 
form the scaly bracts, are proportionately much shorter and 
broader, helmet-shaped in fact. The spathe does not show 
at first between the two outer bracts, and the floral bud is 
consequently as broad as long and closely sessile on the 
thallus. The open flower itself (PI. XX., fig. 15) is very 
similar to that of the preceding species. 
Rejuvenescence . — I found this process going on at Cherra- 
punji in many plants which still remained submerged ; the 
process was exactly like that in D. stylosa, var. fucoides, to 
be described below. 
Dicræa stylosa, Wight. 
(Plates XXII.— XXIV.) 
As explained in the preceding paper, I include under this 
name several Ceylon and South Indian forms, which will 
probably ultimately prove to be specifically distinct, but to 
which, pending detailed knowledge of all forms from many 
localities, I have only given varietal rank. We shall deal 
with the forms in order. Warming has described the Ceylon 
form D. stylosa fucoides from Hakinda dry season material 
sent by Trimen, and there is comparatively little to add to 
his description, except for the earlier stages of the life- 
history. 
D, stylosa laciniata, Willis. 
HaMtat.--ThX^ form is common in the Kandy District, 
Ceylon ; it is often confused with D. elongata, to which it 
has considerable resemblance, and with which it is often 
mixed. It also occurs with D. stylosa fucoides, and less often 
with Podostemon subulatus or Hydrobryum olivaceum, very 
