SYSTESLVTIC POSITIOX OF MJTTRASTEMOX. 211 



;9 Ovula ad parietem geminis plus minus stipitata, auatropa, 

 iutegumento unico iustructa. Antlierse connat» multiseriatse 

 mitram forraautes. Germeu sui^erius. 



Tribus III. Mitrastemonese. 

 y Ovula placentis prominentibus varie divisis insidentia, 

 atropa, integumento imico prjedita. Germen inferius. 



Tribus IV. Cytinefe. 



V. Resume. 



Mitrastemon has a close affinity to the Rafflesiaceoe in its external 

 as well as its internal morphology. It diffei-s from the same family in its 

 having an entirely superior ovary and mitraform united stamens. These 

 differences ai-e not such as differentiate families, but are rather tiibal or 

 geueric. To refer the jjlant 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 usuaUy an inferior ovary but sometimes a superior ovary and miti-aform 

 united stamens. The ^Mints differentiating this plant from the three taibes 

 we have at present in this family, are sufficiently gi-eat to make it not 

 unworthy of liaving a special ti-ibe established for it. The new tribe 

 Mitrastemonese should be jjlaced next to Apodantheae. 



VI. Literatur consulted. 



Benth.vsi et HoOKEE, Genera Plantarum I., 11. and III. 



Engler, A., BalanophoracefB, in Engl. u Prantl, Natiiil. Pfl.-fam. III.-l, 



pp. 243-263 



■■ — u GiLG, E., Syllabus der Pflanzeufamilien 7-Aufl. (1912). 



Ggebel, K., I. Organographie der Pflauzen (1898-1901). 



— , H. Vergleichende Eutwickehmgsgeschichte der Pflanzenorgaue, 



aus der Encykl. der Natiu-wiss. (1883). 

 Hay.\ta, B., I. On some interesting x^lants from the island of Formosa, iu 



Tokyo Bot. Mag. XXVI. (1912). 



