SYSTEMATIC POSITION OF MITKASTEMON. 211 



/9 Ovula ad parietem germinis plus minus stipitata, auatropa, 

 integumento unico instructa. Antherae connatfe multiseriatse 

 mitram formantes. Germen superius. 



Tribus III. Mitrastemonese. 



f Ovula placeutis prominentibus varie divisis insidentia, 

 atropa, integumento unico prsedita. Germen inferius. 



Tribus IV. Cytinew. 



V. Resume. 



Mitrastemon has a close affinity to the Rafflesiacese in its external 

 as well as its internal morphology. It differs from the same family in its 

 having an entirely superior ovary and mitraform united stamens. These 

 differences are not such as differentiate families, but are rather tribal or 

 generic. To refer the plant to the family named, it is necessary to extend 

 the definition formerly given to it to such an extent as to recognise that it 

 has usually an inferior ovary but sometimes a superior ovary and mitraform 

 united stamens. The points differentiating this plant from the three tribes 

 we have at present in this family, are sufficiently great to make it not 

 unworthy of having a special tribe established for it. The new tribe 

 Mitrastemonese should be placed next to Apodantheae. 



VI. Literatur consulted. 



BENTHAM et HOOKER, Genera Plantarum I., II. and III. 



ENGLER, A., Balanophoracese, in ENGL. u PEANTL, Natiirl. Pfl.-fam. III.-l, 



pp. 243-263 



u GILG, E., Syllabus der Pflanzenfamilien 7-Aufl. (1912). 

 GOEBEL, K., I. Organographie der Pflanzen (1898-1901). 



, II. Vergleichende Entwickelungsgeschichte der Pflanzenorgane, 



aus der Encykl. der Naturwiss. (1883). 

 HAY ATA, B., I. On some interesting plants from the island of Formosa, in 



Tokyo Bot. Mag. XXVI. (1912). 



