28 Journal of the Asiatic Society of Bengal. [January, 1914. 



■ 



* 



in Rev. Hortic, 1865, p. 111. D. glabra, F. v. Muell., Select 

 Plants for Extra-Trop. Countries, Ind.-edit. (1880), p. 100. 

 D. japonica, Pepin in Mem. Soc. Imp. et Cent. d'Agric. (1854), 

 reprint. ? D. opposita , Thunb., Flor. Jap. (1784) p. 191. D. 

 opposita, Siebold in Verhandl. Bat. Genootsch., xii. (1830), 

 p. 14. D. oppositi folia , Kunth, Enum., v. (1850), p. 390, in part : 

 Kawakami, List Plants Formosa, (1910), p. 122. China from 

 Yunnan and Kwangtung to Pechili, generally cultivated; also 

 in Formosa, the Island of Quelpart off Corea, and in Japan to 

 41° N. It has been experimentally grown in Europe and in 

 India. Hackel has raised hybrids between it and D. japonica. 



57. D. doryophora, Hance, in Ann. Sc. Nat., Ser. 5, v 

 (1866), p. 244 : C. H. Wright, in Journ. Linn. Soc. Bot., xxxvi 

 (1903), p. 91. D. Rosthornii, Diels, in Engl. Bot. Jahrb. 

 xxix. (1900), p. 261. D. Sivinhoei, Rolfe, in Journ. Bot., xx 

 (1882), p. 359. Formosa and the Chinese Provinces of Kwei 

 chow and Hupeh. It seems probable that it may be a depau- 

 perate form of D. Batatas. 



58. D. japonica, Thunb., Flor. Jap., (1784), p. 51: 

 Siebold in Verhandl. Bat. Genootsch., xxii. (1830), p. 14: 

 Makino, 111. Flor. Jap., i. (1889), t. 22. D. Batatas, Pailleux 

 et Bois, Potager d'un Curieux, (1899), p. 231. Japan, com- 

 monly to Lat. 37° N., China in the south and west, and in the 

 Naga Hills of India. 



Variat : — 



var. vera. Spicarum axes tenues. 



var. tentjiaxon. Spicarum axes tenuissimi. 



Varietatam tentjiaxon ex monte Omei in Provincia Szechuen attulit 

 Faber. Varietaa vera per regionem totam reperitur. 



59. D. ltjzonensis, Schauer in Nova Acta Nat. Cur., 

 xix. suppl. i. (1843), p. 444. ? D. divaricata, Blanco, Flor. 

 Filip., (1837), p. 797. Philippine islands: common in Central 

 and Southern Luzon, and found also in the island of Palawan. 

 A species well marked by the size of its flowers. 



60. D. pbperoides, Prain et Burkill in Elmer, Leaflets of 

 Philippine Botany, v. (1913), p. 1597. Luzon and Tonkin. It 

 is closely allied to D. luzonensis ; but has much smaller flowers. 

 Better material from Tonkin may show that the plant which 

 we possess from thence, which we here call a variety of D. 

 peperoides, may be a different species. 



Variat : — 



Var. vera. Folia exaete cordata. 



Var. sagittifoija. Folia minora, ad 7 cm. longa, hastato- 

 sagittata. 



Var. angtjlata. Folia cordato-sagittata. 



