MATERIALS FOR A FLORA OF FORMOSA. 30î> 



Monocotyledones. 



Hydroeharideœ. 



HalopMla. Thou. 



Halophila ovalis Hook. f. ; Ostenfeld, in Philip. Journ. Sei. 

 IV. Snppl. p. (')7. 



Hab. Pratas, Jan. 1908, leg. T. Kawakami. 



DiSTRIB. 



This quite differs from Halophila ovata Gaudich., though 

 they are sometimes confounded on account of their bearing very 

 similar names. //. ovata exists in Japan. 



Orchidese. 



Oheronia Lindl. 



Oberonia formosana Hayata sp. nov. Herba epiphytica, caespi- 

 tosa, caulibus simplicibns vel rarius pauciramosis 3-5 cm. longis 

 toto longitudine foliatis. Folia disticha sessilia alterna approxi- 

 mata verticaliter compressa lineari-lanceolata 22 mm. longa 2 J 

 mm. lata apico aristato-acuta margine intégra basi latere 

 inferiore recta superiore rotundata vaginosa caulem amplectantia 

 crassiuscula. .Spicîr terminnies cum pedunculis 8 cm. longae 

 cernua3, lloribiis miiiutis \ mm. in diaraetro, secus rachin inter- 

 rupte fasciculatim dense sitis, bractois ovato-acuminatis 1 mm. 

 longis refloxo-pat('iitil)Uö. Sepala lateralia late ovata basi connata 

 h mm. longa totiusquc lata obtuso-acuta patentissima posticum 

 minus. I'etala scpalo angustiora ol »longa r^ mm. longa J mm. lata 

 obtusa. I.abcllnni sessile coneavum rotundatum in circumscrip- 

 tione fl mm. longiim tot iusqiii^ latum odobatum, lo1^o medio 



