1594 Leaflets of Philippine Botany [Vol. V, Art. 78 



var. tiliaefolia. D. tiliaefolia, Kunth, Enum., v. (1859), p. 

 401: Miguel, Flor. Iiid. Bat., iii. (1855), p. 576: Ceron, Cat. Herb. 

 Coinis. Flor. Forest., (1892), p. 171: Koorders, in Mededeel. van 

 s'Lands Plantentuin, xix. (1898), p. 313. D. tugui, Blanco, Flor. 

 Filip., (1837), p. 800: Merrill, Rev. Sp. described in Blanco's 

 Flor. Filip., (1905), d. 87. D. papuana, Warburg, in Engl, 

 Bot. Jarhb., xrii. (189l), p. 273. D. tredecimnervis, Pier- 

 re, ma. 



Folia magna, ad 17 cm. lata, ssepe 13-nervia, pubescentia. 

 Flores producit; at adhuc fructus ignoti. Tubera claviformia, 

 in terram infra radices spinosissimos descendentia. 



Insula Luzon. In monte Twin-peaks dicto provinciae 

 Benguet, Elmer, 6421. Ad Lucban in provincia Tayabas, 

 Elvier, 9095. 



Insula Negroa. Ad Dumaguete in montibus Cuernos^ 

 Elmer, 10293. 



Section Lasiopbyton 



Dioscorea Elrneri. 



Tubera ignota. Caulis aculeatus, pilis rufis dense tectua 

 deinde aliquo raodo glabrescens, sinistrorsum volubiiis. Folia 

 alterna: foliola ad 9, ovata vel ovato-elliptica, coriacea, supra 

 glabrescentia, infra ad nervos rufo-pubescentia, basi obtusa 

 vel rotundata, apiee obtusa breviter acuminata: foliolum me- 

 dium ad 18 cm. longum, ad 8 cm. latum, penninerve venis 

 lateralibus septem: foliola altera minora, extrema asymmetrica: 

 petiolu*? ad 10 cm. longus dense pubescens: petioluli 8-12 

 mm. longi. Flores foeminei in spicis siraplicibus pendulis ad 

 26 cm. longis solitarii vel bini compositi: axis dense rufo- 

 pubescens. Sepala lanceolato-avata externe rufo-pubescentia. 

 Petala minora, glabra. Capsulae reflexae, aliquo modo imbri- 

 catae, dense rufo-pul>escentes: alae 25 mm. longae, ad medium 

 10 mm. latae. Semina unilateraliter alata: ala fumosa. 



Insula Luzon. Ad Los Banos in provincia Laguna, Elmers 

 8265. Ad Luoban in provincia Tayabas, Elmer, 9156. 



Species haec a Dioscorea pentaphylla, Linn., differt cap^ 

 sulis pilisque. 



