240 



Alabastrmn gemmae floriferas ovato-lineare erectum rectum basi partibus dila- 

 tatis petiolorum foliorum fertilium involutum petiolo duplo brevius 15cm. 

 longum teres 8 mm. in diametro. Spatha spadice 

 brevior basin spadicis amplectans 13 cm. longa apice 

 convoluto-acuta crassa. Spadix unisexualis cylindricus 

 llcm. longus 2cm. latus apice obtuso-rotundatus 

 deorsum plus minus latior. Flores $ densissime 

 horizontaliter dispositi. Stamina generaliter 6, in 

 mature exserta, filamentis complanatis ovario abor- 

 tive firme contactis 1mm. latis in longitudine vari- 

 abillimis nigricantibus apice subito contractis, antheris 

 adnatis ovato-linearibus 2| mm. longis basi 1 mm. 

 latis. Ovariurn abortivum obconico-cylindricum hexa- 

 gonum in sectione 4-3 mm. longum 4mm. latum apice 

 truncatum planuni ad centrum umbonatum, umbone 

 lineari /'-^-formiter recurvo vel subrecto. 



HAB. Mt. Arisan: Funldko ad 5000 ped. alt., ad 

 truncos repens, leg. B. HAYATA et S. SASAKI, Jan. 

 1912. 



The present plant has long been supposed to be 

 indentical with the Tonga plant, E. pinnatum (LiNN.) 

 ENGLER (=K mirabile SCHOTT, in ENGL. Pfl.-reich 

 Heft 37 (IV. 23-B) p. 60, fig. 25). After careful exa- 

 mination in its native locality, I am much inclined 

 to regard the plant as a distinct species which is cer- 

 tainly closely allied to the Tonga plant. Our species 

 has unisexual spadix of which I was able to examine a 



male one. The new species differs from E. mirabile SCHOTT by the leaves 

 which are oblong in its outline and obtuse but not cordate at the base, and 

 in having unisexual spadix. The plant exists in a forest in Mt. Arisan at 

 elevations of nearly 5000 ft. As to another Epipremnum which was also 

 regarded to be the same as E. mirabile, I am not in the position to say any- 

 thing about its identification, as I have not as yet seen the spadix. 



Fig. 85, Epiprem- 

 num formosanum HAYATA ; 

 a, a spadix a little re- 

 duced; b, stamens and a 

 rudimentary ovary seen 

 from above; c, the same, 

 seen from side; d, e, a 

 stamen, seen from dif- 

 ferent sides; f, rudimen- 

 tary ovary; g, the same 

 in vertical section. 



