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ex basi vel ex apice septicide vel loculicide vel placenticide dehiscentia. 

 Semina numerosa laevia vel rugosa carnoso-albuminosa. Embryo 

 minimus circa hilum positus. 



Genera 9 species 250 per regiones temperatas et tropicas late dis- 

 tributa:. In Korea genera 2 et species 2 sunt indigenae. 



/"Styli apice trilobi. Stamina 6 in 3 paria sub lobis stylorum posita. 

 Capsula loculicide ab apice dehiscens Hocquartia. 



[Styli apice 6-lobi. Stamina 6 aequidistantia. Capsula ex basi 

 septicide et placenticide dehiscens. Aristolochia. 



Recent botanists regard Aristolochiacetz and Asaracetz as the same 

 family. However, the plants of Asaracetz are small herbs with never 

 twining- stems, the perianth are persistent destitute of articulation 

 between the ovary, stamens free from ovary (this fact is observed by 

 Adanson in 1763), fruits are not dehiscent and lay the seeds when 

 the fruits are rotten. These remarkable characteristics of Asaracetz are 

 enough to distinguish itself from Aristolochiacece . Saruma was described 

 by Oliver Ci) as a new g"enus of the Tribe Asarinecz, but it is also 

 distinct from both AristolochiacecE and Asaracetz with opposite leaves, 

 flowers provided with distinct petals (this can not be compared with 

 the rudimental petals of Asarum), introrse stamens, and follicles burst- 

 ing" at the ventral suture. So, I reg'ard it as a separate family Saru- 

 inatacecc. These three families make the real Aristolochiales and the 

 natural position of this order is between Balanophorales and Rafflesiales , 

 a new order. The genera belonging to Aristolochiales are the followings. 



I. Aristolochiales. 



1. Asaracetz Link. 



1. Asarum L. 



2. Heterotropa Morren & Decaisne. 



3. Japonasarum Nakai, gen. nov. (2:) (type Japonasarum cau- 



lescens vel Asarum caulescens Maximo wicz). 



(1) Saruma Henryi Oliver in Hooker, Icones Plantarum XIX, PI. 1895 (1889). 



(2) Japonasarum NAKAI, gen. nov. 



Rhizoma repens. Folia in apice caulis opposita ; lamina sestivatione condupli- 

 cata. Pedunculus terminalis uniflorus pilis multicellularibus hirtellus. Ovarium 

 inferum 6-angulare et 6-loculare. Sepala 3 in alabastro valvata, infra medium 

 connata et sub anthesin lobi tenues perfecte reflexi tubum et partem superiorem 

 ovarii arete obtegentes ; tubus intus planus sub lente papillosus in fructu srepe 



