uec., W17.J SOTULuE AD PLAXTAS JAFONLE ET KOREM. XV. 285 



300) Arisaema longilaminum, Nakai.. sp. nov. 



A serratum, Schott. f. Blamei, Makino in Tok}'0 Bot. Mag. XV. 

 (1901) p. 129. Matsum. Ind. PI. Jap. II. i. (1905) p. 170. quoad 

 plantam ex Kasugayama. 



A remarkable species with long narrow spathe. There is no Ari- 

 Siema having such a flower as this. Its leaves somewhat resemble to 

 that of A. Thunhergii. Flowers appear nearly always in July. 



Perfecte dioicum. Planta mascula cum flore 45—50 cm. alta, faemina 

 fere 100 cm. alta, omnia glaberrima. Tuber depresso-sphaerieus Folia 

 spathacea bina membrauacea, interiora longiora et apice purpureo- 

 maculata. Folia vera bina inferiora majora subinfundibuliforme partita. 

 Spatha ore obliqua et reflcxo-undulata. Folia majora petiolo libero 

 5.3-9.3 viride terete, foliolis mediis petiolulatis lanceolatis v. oblanceo- 

 latis 6-25 cm. longis basi attenuatis apice subcordato-attenuatis, 

 foliolis lateralibus omnibus sessilibus utrinque 3—7 (inlerdum intimis 

 dccurrentibus) lanceolatis v. anguste lanceolatis v. oblanceolatis, ex- 

 terioribus minoribus, supra viridibus v. secus costas irregulariter albo- 

 maculatis. Folia superiora petiolo libero 1—3.5 cm. longo terete v. 

 supra canaliculato, foliolis mediis 4.5-22 cm. longis, lateralibus utrinque 

 2-6. Pars exerta pedunculi 11-25 cm. longa teres et apice incrassata. 

 Spatha; tubus 4—7 cm. longus albidus v. purpureus, lamina elongato- 

 lanceolata ad apicem sensim angustata in mascula 7-8 cm. et in 

 faemina 14-15 cm. longa basi 1.8-4 cm. lata horizontali antrorsum 

 deflexo-ascendens atro-purpurca v. virescenti-atro-purpurea basi longi- 

 tudine pallide striata. Appendix spadicis angusta antrorsum curvata 

 praeter basin albidam atro-purpurca et apice paulum incrassata, basi 

 sensim incrassata et in stipite 2-5 mm. longo subito constricta. 

 Norn. Jap Yamato-tennansho. 



Hab. Hondo : in monte Kasugayama prov. Yamato (Jinzu 

 Matsumura et Sabuko Okubu) planta 1T, in monte Murou- 

 san prov. Yamato (Matsuwaka Kisiiid.v; ]>lanta? $ et ?. 



301) Perilla citriodora, (Makino) Nakai. 



P. ocimoides, I., a. tjrpica, Makino I. citriodora, Makino in Tokyo 

 Bot. Mag. XXVIII (1914; p. 180! 



Species P. arguta amnis, sed differt exqua loliis cum citralo odorem 

 i)li-<> Liinoni rimnlantem agentibus, calycifl lobia apice post antheshi 

 toto i oiikiiiiii clandentibus. [nfldMsoentia initio cum bracteie lacteia 

 late ovatis pyratnidetn album perfectum quadrangularem formantc. 

 Planta pretioM I Bxqttibtts Bpeciminibua seipiexsiccatis 1.5-1. 7?» oleum 



