63. RUBIACEjE. 97 



22. Damn-acanthus. 



DicJiotomous Key to the Formosan DamnacantJius. 



( 1 ) Leaves ovate, smaller 2-3 cm. long, spiny D. indicus. 



Leaves lanceolate, linear nearly 10 cm. long, less spiny or not at all 

 spiny D. angmtifolia. 



Damnacanthus angustifolius HAYATA Fl. Mont Formos. p. 113. t. 



XV. 



HAB. Arisan. 



Damnacanthus indicus G-.EETN. ; HAYATA Fl. Mont. Formos. p. 114. 



HAB. Arisan, Mt. Morrison, Hinokiyama. 



DISTRIB. Eastern India, Central China, tlie Loo-choo islands and Japan. 



23. Psycliotria LINN. 



Key to tic Formosan Species. 



Erect, leaves elliptical or lanceolate, 14 cm. long, 4 cm. broad, acute at 

 the apex, attenuate at the base P. elUptica. 



Repent on the ground or on a trunk, branches much divaricate, leaves much 

 smaller, obovate or oblong, 4 cm. long 1| cm. broad P. serpens. 



Fsychotria elliptica KER. ; MATSUM. et HAYATA Enum. PI. Formos. 

 p. 194. 



HAB. Pachina, Hokkokei, Giran, Tonsonpi, Taito, Senton, Kelung, 

 Kusshaku. 



DISTRIB. Kwaugtuug, Hongkong, Hainan. 



Psychotria serpens LmN. ; MATSUM. et HAYATA Enum. PI. Formos. 

 p. 195. 



HAB. Maruyama, Hokkokei, Kotosho, Pacliina, Taiton, Kelung. 

 DLSTRIB. Central and Southern China and Corea. 



24. Geophila DON. 



Geophila reniformis DON. ; MATSUM. et HAYATA Enum. PI. Formos. 

 p. 195. 



