RUBIACE.T:. 113 



Fl. Hongk. p. 137) but differs from them by the longer stamens and fewer- 

 flowered-umbels ; also near to G. dentigera HARMS (DiELS Fl. Centr. Chin. p. 

 487) from which our plant can be distinguished by the quite entire leaves. 

 The three congeners above mentioned and the plant just described are very 

 like each other, and the difference, if any, is the slightest. It is, therefore, 

 difficult to know one from another only by descriptions. 



Rubiaceae. 



Litosanthes gracilis HAYATA sp. nov. Frutex gracilis 1-2 m. alta, ramis 

 et ramulis gracilibus, hirsutis, ramulis divaricatis oppositis patentibus, teretibus, 

 rectis. Folia opposita, obovata 15 mm. louga 5 mm. lata, apice acuta vel 

 cuspidato-acuta, basi acuta vel cuneata obliqua, supra glabra, subtus ad 

 costas et rnarginem strigosa, supra costis et veiiis planis subtus elevatis, 

 venis primariis lateralibus utroque 6-7, simplicibus plus minus arcuatis ad 

 marginem attingentibus, venulis secundariis a costa angulo 90 patentibus, 

 petiolis 1 mm. longis strigosis. Flores axillares solitarii, longe pedicellati, 

 pedicellis gracilh'bus patentissimis, angulo 90 divaricatis, folium in longi- 

 tudine superantibus, hirsutis, 1| cm. longis, apice pedicellorum 1-floratis vel 

 2-floratis basi calycis 1- vel 2-bracteatis, bracteis acuminato-triangularibus 

 liirsutis. Calyx obconico-campanulatus, 2 mm. lougus, extus hirsutus, limbo 

 4-dentato, intus glabro, dentibus acutis, triangularibus margine ciliolatis iutus 

 glabris. Corollfe tubus urceolatus, extus glaber ad faucem iutus longe barbatus 

 2i- mm. longus totiusque latus, limlx) 4 dentato, dentibus pateutibus reflexis 

 ovato-triangularibus 2 mm. longis, apice apiculato-acutis, basi latioribus 1 mrn. 

 latis, extus glabris, intus breve hirsutis. Stamina 4, infra faucem corollse 

 affixa, filamentis brevibus, antheris oblongis utrinque emarginatis, dorsifixis, 

 mm. longis. Ovarium inferius, 4-loculare, Icciilis 1-ovulatis, discus carnosus, 

 stylas columnaris, apice breve 4-lobus, lobis erectis, ovulis erectis anatropis. 

 Fructus baccatns, globosus 3-4 mm. in diametro, nigricans, 4-lobus, 4-pyrenus. 



HAP,. Kusukusu, leg. B. HAYATA et S. SASAKI, Juli., 1912 ; Botanrosha, 

 leg. G. NAKAHARA. 



Near L. l>ijlr>r" BL. specimens of which I have never been able to compare 

 with this plant. The description given in " DC. Prodr. IV. p. 465 " is not 



