117 
6° Calyx 5-dented; one of the teeth separate as far as the 
base; the four other ones grown together almost as far as the 
top, corolla regudar, three stripes on each lobe 5 fertile stamens. 
7° Tetramerous flower (fig. 31‘), the two inferior lobes with 
two dark stripes; between them a normal stamen; between a 
and d, ¢ and 6 a staminode, between ¢ and d nothing. 
8° Hexamerous flower. The middle one of the three inferior 
lobes with 3, the two adjacent ones with two stripes, between 
the three lobes two normal stamens; 4 staminodes. 
Although the disturbances of these flowers are not of great 
importance, still one may gather from the careful observations 
just given the extent of the variability of some plants. 
Vi. 
Fruits. 
Citrus (Malayan: Djeroek). Inside the fruit a second much 
smaller one was enclosed. 
Citrus decumana , idem. 
Both cases are of so frequent occurrence in different species 
of Citrus, as may be seen from the works of Masters and 
Penzig, that it seems needless to enter into greater detail. 
Musa (Malayan: Pisang Radja). A beautiful instance of syn- 
carpy is represented in fig. 32. The spots marked o represent 
longitudinal cavities. The same phenomenon frequently occurs , 
but on a much larger scale, in Menado-coffee. 
Solanum Melongena (fig. 33). A preserved fruit bears a seed- 
bearing excrescence. 
Vil. 
Polyembryony. 
Cocos nucifera. During my stay at Buitenzorg Dr. W. Burck 
gave me a Cocoa-nut, which on examination was found to 
enclose two embryos, more or less grown together. Whether 
we have to do here with actual polyembryony, or with one 
