438 cxxi. nALANOPnoRE/f: (rotting hemsley). [Thonnhnfia. 



Flnwor-heads unisexual. 

 Flower-beads subglobose. 



luvohu-ral-scnk's juvUc, nol a( iiiniuaU'. 



redunclcs .1-3 in. loiij^ . . . , . 1. T. naiirfidnm. 



Peduncles ^-^ in. long . . . . . 2. 7'. diihut. 



luvolud'al-seales aeuniiiiatt.', very acute . % . 3. J", tii/dudcn&in, 



riower-lieads ovoid. 



luvolucral-.scales L'longafe-acuniiuiitf . . .4. T. eli-'ijana. 



Flower-heads bisexual. I'eduucles very short or obsolete. 



Male perianth deticieut. Femiile perianth inflated 5. T. sessilis. 

 Male perianth present. Female perianth very 



narrow, eylindrical , . . . , Q. T. nngolensiis. 



1. T. sanguinea, VaJd in Danslce Selslc Skrifier, vi. 125, t. G. 

 Tuber only seen in a young condition, 9-12 lin. in diam. Rhizomes 

 branched, 2-3 lin. in diam. in a dried state, more or less pubescent. 

 Volva obscure. Peduncles 1-3 in. long. Scales of the peduncle thick, 

 ovate-lanceolate, increasing in size upwards, 2-6 lin. long, keeled, 

 obscurely serrulate, glabrous outside, hairy inside at the base, scarcely 

 acute. Scales of the involucre similar but larger, except the innermost 

 ones, the longest about 'J liii. long. Flower-heads unisexual, |-1 j in. 

 in diam.; male smaller and more numerous than the female. Male 

 flowers about 50 in a head, seated on aflat or slightly convex receptacle 

 and interspersed with small subulate or filiform bracteoles 4-8 lin. long. 

 Perianth variable, irregular, imperfect, 2-G-lobed but usually «^-lobed ; 

 lobes of unequal length and degree of attachment to the staminal-column, 

 linear, 1-3 lin. long, acute, erect. Anthers o-d, about as long as the 

 perianth (and pedicel?), at first consolidated, at length separating (?). 

 Fema e flowers very numerous, 1-1 J lin. long. Perianth (and ovary) 

 equal or slightly longer or shorter than the style, tubular above the 

 ovary, mouth obscurely and irregularly toothed. 



Upper Guinea. Sierra Leone: Bagru lliver, Mann, 907! Gold Coast: 

 Aquapim, Thonning ! Aburi, Leslie! Aslianti, Cummins, 192! Lagos: Yoruba, 

 MiJlson, 145! Northern Nigeria: near Mount Purdy, Barter ! Nigeria, T allot I 



]bower Guinea. Canicroons: IJipinde, Zenker, 1737! Lower Congo: 

 Kinchassa, Schlechter, 12803 ! 



The definition of this and of the following proposed species is by no means 

 complete and satisfactory, and can only be regarded as suggestive and provisionnl. 

 Of the Talbot drawings, those numbered 707, 725 and 72G probably represent T. 

 ssnnguinea, although the involucral scales are pale in colour, and more acuminate in 

 shape than tliose of any of the herbarium specimens referred here. 



2. T. dubia, Hemsl. Tuber not seen. Rhizomes cylindrical, 2-3 

 lin. in diam., obscurely pubescent. Volva short, truncate with a more 

 or less broken margin. Peduncles contiguous, J- J in. long, or un- 

 developed ; scales triangular-ovate, 2-4 lin. long, subobtuse. Scales 

 of the involucre multiseriate, ovate-lanceolate to nearly linear, up to 

 1 in. long, hardly acute, irregularly finely serrulate. Flower-heads uni- 

 sexual, the male apparently as large as the female, 1-1-^ in. in diam. ; 

 male receptacle convex, 0-6 lin. in diam.; female receptacle hemispherical. 



