RUBIACE/E. 113 



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

 flowered-umbels ; also near to G. dcntigt-ra HARMS (DiELS Fl. Oeiitr. 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. longa 5 mm. lata, apice acuta vel 

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

 costas et marginem strigosa, supra costis et venis plains subtus elevatis, 

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

 mai-gmem attingentibus, venulis secundariis a costa aiigulo 90 patentibus, 

 petiolis l^ mm. longis strigosis. Flores axillares solitarii, longe pedicellati, 

 pedicellis gracillibus patentissimis, angulo 90 divaricatis, folium in longi- 

 tudiue superantibus, hirsutis, 1^ cm. lougis, apice pedicellorum 1-floratis vel 

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

 hirsutis. Calyx obconico-campauulatus, 2 mm. lougus, extus hirsutus, limbo 

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

 glabris. Corolla tubus urceolatus, extus glaber ad faucem intus longe barbatus 

 2i- mm. longus toti usque latus, limbo 4-dentato, dentibus patentibus reflexis 

 ovato-triangularibus 2 mm. longis, apice apiculato-acutis, basi latioribus 11 mm. 

 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, loculis 1-ovulatis, discus carnosus, 

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

 Fructus baccatus, globosus 3-4 mm. in diametro, nigiicans, 4-lobus, 4-pyrenus. 



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

 leg. G. NAKAHARA. 



Near L. In flam BL. specimens of which I have never been able to compare 

 with this plant. The description given in " DC. Prodr. IV. p. 4H5 " is not 



