346 
2) Mouth of the lip fully open owing to the divergent posi- 
tions of the lobes (distal) of the alae which are contorted over 
each other. 
Group (1). The two species of this group have very elongated 
spurs and I have never seen any insect enter a flower. In 
neither is there an auricular lobe. I think that most probably 
this group is fertilized by moths at night. 
roup ( Except in the single case of Z. cymbifera, Hook. f. 
all the species of this group have extremely developed auricular 
lobes 1 noticed are visited by butterflies and bees during day- 
time. The action is as follows:—The butterfly alights directly 
upon the auricular lobes thus getting a purchase, and at the same 
time has its body forced up against the pollen owing to the 
height of the lobes. If the lobes did not exist, the insect 1m 
many species could crawl directly into the mouth and rob the 
honey without coming into touch with the anthers. Further, 1t 
-may be noticed that in all species the lobes are bright orange, a 
very distinctive colour as compared with the remainder of the 
flower, so as to attract the butterfly. 
Group (8). Here the mouth is closed by the contorted wings 
and all species are devoid of auricular lobes. These species also 
are visited at day by butterflies and bees. Auricular lobes, if 
present, would be hidden by the contorted wings. The flowers 
are however smaller as in J. graciliflora, Hook. f. and I. 
drepanophora, Hook. £. and many more, and the insect, in 
actually forcing its way into the mouth, is driven against the 
anthers. 
D&HISCENCE OF THE CapsuLEs OF BuRMESE [MPATIENS. 
In dividing the Jmpatiens of Burma into the main sections: 
(a) species with a short turgid capsule and ach 
(6) species with a linear or clavate capsule, 
the writer has found that in the species collected by him in 
Burma (some 25) there is also & most profound difference both in 
the character of the tissue of the capsule itself and also in the 
method by which the ripe seeds are ejected, and these two differ- 
ences group themselves without a single exception in exact 
accordance with the above sections. 
Section (a). The entire capsule is composed of thick glistening 
elastic tissue, and the seeds are distributed throughout the entire 
length of the pod. 
opened: (2) The seeds are now rapidly ejected by the upner half 
of the capsule folding down over the lower half. | 
— Section 
of thick glistening elastic tissue, and this is devoid of seeds; the 
_ upper portion is merely a thin membranous bag with no elastic 
property, and its only use is as. a receptacle for the seeds. The 
