1904.] D. Prain & I. H. Barkill — On Dioscorea deUoidea^ etc. 9 



Dioscorea nipponica Makino, lUuatr. Flor. Jap., I., (? 1891) No. 1 (not 

 seen). 



Central Japan. Island of Nippon : Joshu (Hitachi) ; Schimizu- 

 toge, Makino. 



Makino gives the Japanese name as Uchiwa dokoro on the label of a herbarium 

 specimen kindly sent to us by Mr. S. T. Dunn from the Hongkong Herbarium. 

 Besides this specimen we have seen a coloured drawing of the fruit made by Mr. 

 Makino. r 



Dioscorea quinqueloba, Thunb. Radix ignoia,. Oaules glabri, sinis ; 

 trorsum volubiles, teretes, inermes, virides. Folia alterna, tenuiter 

 chartacea, supra glaberrima, subtus nonnunquam ad nervos et nervulos 

 pilis minutis simplicibus hirtella, pellucido lineolata, cordata, acuminata, 

 apice minutisslme mucronulata, basis sinu lato, infiraa septem — , rare 

 novem — , loba, media quinqueloba, superiora triloba vel sinuata, 7-nervia, 

 nervis extimis prof undo bifidis, nervulis secondariis reticulatis utrin- 

 que distinctis, 6-8 cm. longa, 5-10 cm. lata : petiolus glaber, canaliou- 

 latus, 3-7 cm. longus. Spicse masculae simplices vel ramosae, solitariea 

 vel bines, axillares, 4-6 cm. longae pedunculo "S-l'O cm. longo incluao : 

 flores pedicellati, in cymulis •3-'4 cm, remotis dispositi : rhachis pedun- 

 culusque glabri : bracteaa lanceolatse, 1*5 mm. longaa : bracteolae ovatae, 

 acutse, glabrae, floribus breviores. Perianthii masculi laciniae ovatee, 

 obtusse, subaequales, patentes. Stamina 6, aequalia : antherae filamentis 

 multo longiores. Spicse feminese axillares, solitarise vel geminse, 

 simplices, 10-12 cm. longae, dependentes ; flores 10-12, breviter pedicellati, 

 deorsum spectantes, circa '75 cm. remoti : bracteae et bracteolae adsunt. 

 Gapsulse assurgentes : alae maturas pergamentaceae, basin versus rotun- 

 datae, apice truncatae, 1-75 cm. longae, '7 cm. latae, stramineae. Semina in 

 quoque loculo gemina, latissima, complanata, ala membranacea alba 

 inaequaliter circumcincta. — Dioscorea quinqueloba, Thunb. Flor. Jap., 

 (1784), 150; Kaempfer, Ic. Sel., (1791), t. 15 (a satisfactory picture) 

 Somoku Dusets, 2nd. ed., XX., t. 54. 



Southern Japan. Island of Kiusiu, Nagasaki, Buerger, Oldham 

 890, Maximowicz, 



The Japanese name as given in the Somoku Dusets is Kikuba Dokoro. 



Dioscorea tenuipes, Franchet et Savatier. Badix nobis ignota, teste 

 Franchetio Savatieroque tuberosa et depresso-globosa. C aides glabri, 

 sinistrorsum volubiles, twetiusculi,, juniores minopere angulati, iner- 

 mes, virides. Folia alterna, membranacea, glaberrima, nitentia, mar- 

 gine interdum undulationibus miimtis notata, cordato-ovato-acuminata 

 J. II. 2. 



