DIOSCOREACEZ. 357 
Herba perennis, volubilis, caulibus crassiusculis primum sparse pilosulis deinde glabris. Folia 
alterna, longe petiolata, membranacea, 13-15-nervia, orbiculari-cordata (interdum obscure 
trilobata), 4-9 poll. longa, acuminata, sparse puberula vel pilosula. Flores masculini brunnei, 
glabri, 4-5 lineas diametro, racemoso-paniculati; panicule plus minusve pilosulz, ad semi- 
pedales, multiflore; ramuli graciles; pedicelli filiformes, 3—4 lineas longi; bractee parvee ; 
perianthium fere a basi 6-phyllum ; segmenta lanceolato-oblonga, obtusiuscula, patentissima ; 
stamina 3, libera, perianthio paullo breviora, patentia; filamentis deorsum vix dilatatis ; 
staminodia nulla— Kunth, Enum. Pl. v. p. 409; D. grandiflora, Mart. et Gal. in Bull. Acad. 
Brux. ix. 2 (reprint, p. 21), non Mart. 
South Mexico, mountains near Oaxaca at 7000 feet (Galeotti, 5457), Guadalupe, 
near Mexico (Bourgeau, 739). Hb. Kew. 
11. Dioscorea grandifolia, Schl. (Descript. mutat.) 
Foliis 11-13-nerviis maximis, in ramulis floriferis usque ad sesquipedalibus subtus in rete vasculoso 
albo pilosulis, floribus masculinis laxe racemosis, perianthio fere 6-phyllo, staminibus 8, fila- 
mentis crassis. 
Herba vel frutex volubilis, caulibus glabris, angulatis. Folia alterna, longe petiolata, membranacea, 
1]-138-nervia, nervis extimis furcatis, cordiformia, longe acuminata, acutissima, 16—18 poll. 
longa, 23-9 poll. lata, supra glabra, subtus preesertim in nervis venisque albo-pilosula ; peti- 
olus gracilis. Flores masculini glabri, 2-24 lineas diametro, racemosi; racemi laxiusculi. 
graciles, simplices, vel basi furcati, ad semipedales; pedicelli filiformes, solitarii, 2-4 lineas 
longi; bractez parve ; perianthium fere 6-phyllum ; segmenta lineari-oblonga, obtusa, paten- 
tissima ; stamina 3; filamenta libera, crassa, segmentis breviora, divaricata. (Flores feminei 
ignoti.) . ; 
SoutH Mexico, in woods between Acatlan and Chiconquiaco (Schiede). Hb. Kew. 
Independently of its large leaves, this species is very distinct from the other Mexican 
and Central-American ones in its male flowers. We have been unable to match the 
original male specimens with fema es. 
12. Dioscorea hirsuta, Mart. et Gal. in Bull. Acad. Brux. ix. 2 (reprint, p. 20) ; 
Kunth, Enum. v. p. 408. 
SoutH Mexico, Mirador 3000 to 3500 feet (Galeotti, 5458). 
Said to be very near D. floribunda. 
13. Dioscorea leiboldiana, Kunth, Enum. Pl. vy. p. 355. 
SoutH Mexico (Leibold). 
14. Dioscorea macrostachya, Benth. (Descript. reform.) 
Glaberrima, foliis 7—9-nerviis, ovato- usque ad orbiculari-cordatis, floribus masculinis in spiculas 
2-5-floras racemosis, perianthii segmentis orbicularibus, staminibus 6, antheris subsessilibus, 
. floribus femineis racemosis, capsula immatura obovato-oblonga. 
Herba vel frutex volubilis vel per petiolos scandens, omnino glaberrimus, caulibus breviter sulcatis. 
Folia alterna, longe petiolata, membranacea, 7-9-nervia, ovato-cordata ad orbiculari-cordata, 
caudato-acuminata, lamina 24-5 poll. longa lataque ; petiolus gracilis, 11-24-pollicaris. Flores 
masculint virides (ex Galeottio), purpurei (ex Hayesio), circiter lineam diametro, in spiculas 
vel glomerulas, 2-5-floras, breviter pedunculatas aggregati (rarissime pedunculis 1-floris) ; 
spicule densiuscule racemose ; racemi solitarii, 3-5-pollicares, rhachi angulata; bractes 
