1924] NAKAI. ARALIACEAE IMPERII JAPONICI 15 



Panax 2. Oplopanax Torrey & Gray, Fl. North America I. 648 (1840). 



Horsfieldia Seemann in Jour. Bot. v. 237 (1867), non Blume. 1 



Oplopanax Miquel in Ann. Mus. Lugd.-Bat. i. 16 (1863). 



Panax De Candolle, Prodr. iv. 252 (1830).— G. Don, Gen. Syst. m. 384 



(1834), pro parte. 

 Fatsia Bentham & Hooker, Gen. PI. I. 3, 937 (1867), pro parte. 



Folia saepe peltata grosse inciso-serrata. Flores racemosi; calycis dentes subnulH 



E. japonicum 



Folia nunquam peltata minute scrrulata. Flores stricte umbellati; calycis dentes 

 saepe evoluti E. datum. 



Echinopanax japonicum Nakai, sp. nov. 



Oplopanax horridum Torrey & Gray apud Miquel in Ann. Mus. Bot. Lugd.- 

 Bat. i. 16 (1863); non Panax horridum Torr. & Gr. 



Aralia Laribuki Keiske herb, ex Miquel, 1. c. (1863), pro synon. 



Aralia Faribuki Siebold herb, ex Miquel, 1. c. (1863), pro synon. 



Horsfieldia horrida Seemann in Jour. Bot. v. 237 (1867); Rev. Gatt. Heder. 

 86 (1868), quoad specimina e Japonia. 



Fatsia horrida Bentham & Hooker, Gen. PI. i. 939.— Dippel, Handb. Laub- 

 holzk. in. 238 (1893), quoad plantam Japonicam. 



Fatsia horrida Franchet & Savatier, Enum. PI. Jap. I. 194 (1875). 



Echinopanax horridum Harms in Engler & Prantl, Nat. Pflanzenfam.m. abt. 

 8, 34 (1894); Mitt. Deutsch. Dendr. Ges. xxvu. 34 (1918), quoad plantam 

 Japonicam.— Schneider, 111. Handb. n. 430, fig. 291, g (1909), quoad 

 plantam Japonicam. — Matsumura, Ind. PI. Jap. n. 418 (1912). 



Affine E. horrido sed exquo foliis grossius incisis longe acuminatis, 

 spinis rigidioribus, inflorescentia nunquam barbata statim dignoscendum. 



Frutex; caulis densissime aculeatus. Folia longe petiolata; petioli 

 dense hispidi; lamina palmatifida, lobis inciso-laciniatis, supra viridia, 

 ad venas aciculata, infra pilosa et ad venas aciculati, basi cordata 

 saepe peltata. Flores racemoso-decompositi; pedunculi et pedicelli 

 pilosi saepe aciculati; calycis lobi obsoleti; petala viridescentia. Bacca 

 6 mm. longa, rubra, stylis 2-fidis persistentibus coronata. 



Yeso: Esashi, K. Miyabe & Y. Tokubuchi; sine loco speciali, L. Boehmer; 



Hakodate, C. Wright. 



Hondo: monte Iwatesan, G. Nakahara; monte Iwakisan, H. Sakurai; 

 Nikko, J. Matsumura; ibidem, H. Sakurai; monte Bandaisan, R. Yatabe 

 & J. Matsumura; monte Hakusan, R. Yatabe & J. Matsumura; ibidem, 

 J. Nikai, no. 1981; Ibidem, //. Sakurai; monte Gassan, S. Okubo; monte 

 Ontake, J. Matsumura; ibidem, G. Koidzumi; monte Yatsugatake, H. 

 Sakurai; monte Iidesan, K. Nemoto; monte Hakkodasan, U. Faurie, no. 

 6235; ibidem, E. H. Wilson, no. 7097; Yumoto in Nikko, E. H. Wilson, 

 no. 6834; Nippon media et Nambu, Tschonoski. 



Echinopanax elatum Nakai, Fl. Kor. I. 276, t. 15 (1909); Veg. Dia- 

 mond Mts. 180 (1918)*. 



Echinopanax horridum Komarov in Act. Hort. Petrop. xxv. 119 (Fl. Mansh. 

 in.) (1909).— Harms in Mitt. Deutsch. Dendr. Ges. xxvu. 34 (1918), pro 



parte. 

 Korea: Hotaisan, M. Furumi, no. 247; monte Rorinsan, T. Mori; 



monte Chiisan, T. Nakai; Diamond Mts., T. Nakai, no. 5697, T. Uchi. 



1 Horsfieldia contains only H. acuUata Blume which has peltate leaves with dense stellate 

 hairs and paleaceous fruits. 



