. 81 



Further Bower describes the origin of the feeder and sprout- 

 ing of the seed, which being more of biological then of 

 morphological value will have to be looked up in the original. 



Although polyembryony is highly developped in Gnetum 

 Gnemon only one embryo finally develops. 



RECAPITULA.TION OF HISTOUICAL PART AND PLAN OF WORK. 



From the historical review we have seen that it took a great 

 deal of time before the cause of the existing controversies as 

 to the organogeny of the female flowers was found. The finding 

 of it is due to Strasburger who discovered that two kinds of 

 female flowers exist: the complete ones in the purely female 

 inflorescences and the incomplete ones in the androgynous 

 (usually called male) inflorescences, the former containing three, 

 the latter but two envelops. Beccari was first in describing 

 the organogeny of the female flowers completely; his results 

 were confirmed by Strasburger and Karsten and are as will 

 be seen by mine. The only point on which no uniformity of 

 view has been obtained is the estimating of the morphological 

 value of the different envelops. 



The origin of the embnjosacs has been fully described by 

 Strasburger, his results have been confirmed by Karsten and 

 as what I saw of it confirmed it also, I found no reason to 

 penetrate deeply into the question. 



The origin of the microspores has been described by Karsten, 

 I have made no observations concerning them. 



Sprouting of the emhryosacs. Strasburger observed this up to 

 the presence of several nuclei in the embryosac and as his 

 material was not fertilised he finally found them filled com- 

 pletely with endosperm. Karsten considers Gnetum Gnemon 

 particularly unfit for research. In his first work he describes 

 the embryosac to be finally filled with primordial cells which 



Ann. Jard. Buitenz. 2 Ser. Vol. I. 6 



