134 OECHIDE^. 



Arisan. It was found on a large trunk of a Quercus at Nimandaira. Very 

 distinct for the comparatively large flowers of greenish colour. 



Cleisostoma ionosma Lixdl. "Bot. Regist. (1847) t. 41 ; " Walp. Ann. I. 

 p. 791 ; Ridley in Philip. Joum. Sc. I. Suppl. (1906) p. 39 ; Makixo in Tokyo 

 Bot. Mag. XXII. p. 60. 



Hab. Formosa, loco non indicate, leg. R. W. Irwin, Jan., 1912 ; Urai, 

 Koshun : Terasoyama, leg. B. Hayata et S. Sasaki, Aug., 1 912. 



The orchid is found plentifully in the woods in Mt. Teraso. It is quite 

 common in the hiUy regions of the island. 



Cleisostoma oblongisepala Hayata sp. nov. Herba epiphytica, ra- 

 dicibus teretibus 3-4 mm. in sectionis diametro, caulibus 25 cm. longis a basi 

 usque ad apicam foliosis, teretibus, 4-5 mm. in sectionis diametro, vaginis 

 foliorum imbricatis caulem amplectantibus glabris. Poha crassa, viridia, glabra, 

 disticha, alterna, angustata, 10 cm. longa 17 mm. lata, apice aristato-acuta 

 basi abruj)te contracta ad vaginam abeuntia, supra ad costas impressa, supra 

 plana, costis et venis non visis, basi plus minus tortuosa, cum vaginis arti- 

 culata, margine Integra plus minus recurvata, vaginis cylindraceis circ. 3 cm., 

 longis, ore truneato-obUquis. Racemi axiUares, breves, 2 cm. longi, pauciflorati. 

 Flores apertientes 1 cm. in diametro, albicantes centro rabescentes, pediceUis 

 brevibus (cum ovariis) 4 mm. longis triqnetris, 3-co3tatis, bracteis brevibus 1- 

 2 mm. longis ti-iangularibus basi dilatatis pedicellum semi-amplectantibus. 

 Sepala posticum oblongum 7 mm. longum 4^ mm. latum, apice rotmidatum 

 concavum, lateralia plus minus obliqua, breviora quam postico. Petala obovato- 

 oblonga, 6| mm. longa, 3 J mm, lata. LabeUum j)lus minus versus apicem 

 rubescens, ad columnam adnatum, 4| mm. longum basi saccatum, (sacco brevi, 

 squama j)OHtica clause, squama lineari, minute hirtella,) 3-lobatum, lobis 

 lateralibus minutis ad latus oris saccai adnatis obtusis dentiformibus, lobo 

 medio erecto emarginato centro mucronato, intus hirtellato. Anthera 2 mm., 

 longa antice breve producta. PoUinia 4, per paria conferta, stipite hyalino ; 

 Columna apice rubescens, 3 mm. longa. 



Hab. Botansha, leg. C. Owat.vpj, 1898. The orchid was brought back to 

 the Koishikawa Garden by Mr. C. Owatari in liis first expedition to Formosa. 



