Vol. X, No. 1.] The Dioscoreas of the Old World. 27 



[N.S.] 



Varietas vera ubique vulgaris. Varietates Simbha et Kacheo in 

 montibus sikkimensibus et in locis ab iis versus orientem tendentibus 

 reperiuntur. Varietas suavior in India colitur. Varietas birmanioa m 

 Burma et Assamia colitur. Varietas sativa in litonbus mans Pacihci 

 colitur, neenon nuper in India Varietas elongata in Australia crescit: 

 a clariss. Manson Bailey descripta, nobis parum nota est. Varietas 

 delt)Idea in insula Hongkong reperitur {Bodinier, 1310 !). 



53. D. Bogbbsii. This species, like D. bulbifera, var. 

 elongata, has an elongated root. We think it possible that both 

 may be hybrids of D. bulbifera with species of the section 

 Enantiophyllum. D. Rogersii has been obtained in the Anda- 

 man islands. 



D. Rogersii. Tuber elongatum, came album nee amarum. Caulis 

 glaber* lsevis, teres, purpureo-maculatus. Folia alterna, ovato-cordata, 

 acuminata, ad 13 cm. lon-a, ad 11 cm. lata, glabra, 9-nervia: venae 

 secundaria? plus minusve oblique trajectae. Flores mans vel in spicas 

 dependentes 1— 4-nae ad axillas foliorum vel raicemosim in mflores- 

 centias ad 20 cm. longas compositi : axis angularis : bractea? naviculan- 

 ovatse, acuminata?, 1 mm. longae: bracteolae lineares, acuminatae, *5 

 mm. longae. Alabastra elliptico ovoidea. Perianthii maris lobi 6, basi 

 ipsa conjuncti, sequilongi, interiores exterioribus paululo angustiores, 

 crassiores. Stamina fi, tria aliis paululo longiora, in basi perianthii lobo- 



rum inserta. Flos famine™ ignotus. .«. - * *. « <>~ , 



Insulje Andamanic^. Ad ripas fluminis Rablikchokal , Rogers, 61 l 

 Vix an ne vix D. bulbiferce hybrida sit. Typus in herbario Horti Regn 

 Calcuttensis conservatur. 



54. D. Brandish. This appears to us to be a hybrid be- 

 tween D. bulbifera and D. glabra. It was obtained by the late 

 Sir Dietrich Brandis in some unrecorded locality in Burma. 



D. Brandish. Tuber ignotum. Caulis glaber, laevis, teres, sinis- 

 trorsim volubilis. Folia alterna, glabra, hastata, acuminata, ai 18 cm. 

 ionga, ad 7 cm. lata, 7-nervia : venae secundaria trajectae, rectae, vix 

 conspicuae. Flores maris in racemos spiciformes in inflorescentiam ad 

 12 cm longam compositi: bracteae floris maris lanceolatae, acuminatae : 

 bracteolae similes minores: pedicellus bractea paululo brevior. Peri- 

 anthii lobi 6, basi ipsa conjuncti aequilongi, obtusi, brunneo-maculati . 

 Stamha 6: filamenta 1 mm. Ionga, in basi perianthii loborum inserta: 

 anthers subrotundatae. Flores fozminei ignoti. 



Burma. In Burma inferiori, loco non indicato, Brandis ! Typus in 

 herbario horti botanici Calcuttensis conservatur. 



55. D. punctata, R. Brown, Prod. Flor. Nov. Hoil., 

 (1810), p. 294, in part: Kunth, Enum., v. (185)), p. 390: 

 Benth., Flor. Austral., vi. (1873), p. 46. Obtained in the nor- 

 thern part of Queensland more than a century ago, but not 

 since. It may be a hybrid of D. bulbifera with D. transversa ; 

 and if so, a comparison may be made between it and D. 

 bulbifera, var. elongata. 



Section 7. Enantiophyllum. 



56. D. Batatas, Decne., in Rev. Hortic, Ser. 4, iii. 

 (1854), p. 243, and iv. (1855) p. 69. D. decaisnmrm, Carriere, 



