112 THE BOTANICAL MAGAZINE. [Voi. xxvi. No. 304, 



The last I may here mention is a flowering plant which is 

 perhaps hj far the most interesting of all the Formosan 

 plants at present known to us. It is a plant belonging to 

 Mitrastemon, a genus which was established upon a Japanese 

 plant ^) by Mr. T. Making in 1909, and is regarded by the 

 same author as representing a new family, Mitrastemonaceser^ 

 As exhaustive descriptions of the genus and family are to be 

 found in the November-number of this Journal of the last year, 

 I shall not dare to repeat here even as to the diagnoses. So 

 far as I am aware, Mr. Making is quite justified in establishing 

 a special genus representing the named family ; for the plant, M. 

 Yawamotoi is very peculiar, and widely different from any plant 

 then known to us, and we could not find any other proper 

 family for the said plant. It is a native of Kiushu, a southern 

 island of Japan, and was found as a parasite on a root of 

 Quercus cuspidata. Our Formosan plant exists also as a parasite 

 on a root of a Quercus, as its congener does, but of a different 

 species, Q. glauca. It was first discovered by Mr. S. Sasaki, on 

 Mt. Muto, in January, 1911, on an altitude of 4100 ft. Then 

 it was also found by Mr. T. Kawakami on the same spot. The 

 new plant which I propose to call Mitrastemon Kawa Sasakii, 

 in compliments to the above mentioned gentlemen, resembles 

 very much ikf. Yamamotoi ; but differs in the much larger form, 

 and in having cylindrical or vermiformed anther-cells and much 

 more numerous placentae. The technical description^^ of this new 

 plant is as follows : 



Mitrastemon Kawa-Sasakii Hayata sp. nov. (Fam. Mitraste- 

 monacese) Planta parasitica ad radices horizon tales Querci 

 glaucse Thunb. sita, fusco-nigricans, nitida, (in speciminibus 

 nostris alabastris florium) 5 cm. longa cylindrica, 2 cm. in 

 diametro (cum squamis imbricatis). Receptacula basalia pro- 

 funde-cupuliformia, crassa, 2 cm. in diametro, 2 cm.-2i^ cm. in 

 longitudine, infra ores leviter contracta, basi constricta, nigro- 

 fuscentia, non nitida, extus tuberculata, ore irregulariter dentata, 



1) Mitrastemon Yamamotoi Making, in Toky5 Bot. Mag. XXIII. (1909) p. 326. 



2) Makino, Ohi. Fl. Jap. in T5kyo Bot. Mag. XXV. p. 252. 



3) The description is based upon an alcoholic material. 



