l^ray'ia.'] cxxn. euphorbiace^ (prain). 987 



us well as stinging bristles; from both it is as a rule readily sepanible by the more 

 or less markedly trilobate leaves. 



2o. T. lukafuensis, De Wild. Etitdes Fl. Katanga, 206. Stems 

 erect, base not seen, sparingly branched, densely and softly pubescent 

 with subadpressed ascending hairs and sparingly armed with stinging 

 hairs. Leaves sessile or very shortly petioled, ascending, membranous, 

 linear-lanceolate or lanceolate, acuminate, base subhastately auriculate, 

 margin finely and rather closely serrate throughout, all young, tlie 

 largest seen \ in. long, \ in. wide at the auriculate base, \-\ in. wide 

 above the auricles, pubescent on both surfaces especially beneath and 

 along the nerves armed with stinging hairs ; petiole 0-1 lin. long, when 

 present pubescent and bristly ; stipules linear-lanceolate, spreading or 

 reflexed, membranous, 1 lin. long, pubescent externally. Racemes 

 1-sexual, dioecious, terminal on the stems and branches and below leaf- 

 opposed ; males up to 4 in. long, with a basal naked softly pubescent 

 peduncle \ in. long ; flowers very numerous, close-set above, sparse 

 below, glomerulate in threes throughout ; pedicels pilose, shorter than 

 the bracts ; bracts linear-lanceolate, J lin. long, with densely pilose 

 margins and pilose externally. Male sepals 3, ovate, subacute, shortly 

 puberulous within, densely pubescent and bristly externally. Stamens \\ ; 

 filaments longer than the anthers. Female flowers unknown. 

 Soutb Central. Belgian Congo : Katanga; Lukafu, VerdicJc, 220 \ 

 Very closely allied to T. OTcanyua, Pax, to which it beai's much the relationship 

 that T. Rhodesi(£y Pax, bears to T. cordifolia, Vahl, but readily distiiigiiislied by tlie 

 more pubescent leaves, by the glomerulate male Howers and by the appai-ently 

 strictly dioecious habit. The leaves in the three specimens seen are not full grown, 

 and only the tops of the stems have been collected. 



24. T, physocarpa, Frain in Kew Bulletin, 1912, 238. Stems 

 erect and woody below, from a woody base, above copiously branched ; 

 branches long, slender, herbaceous, rigid at first, slightly twining 

 above, finely pubescent, without stinging hairs. Leaves distinctly 

 petioled, membranous, pale green, ovate-triangular, acuminate, base 

 deep-cordate, margin strongly serrate, 2-2 J in. long, J-1 in. wide, 

 sparingly pubescent and very sparingly bristly-setose on the nerves 

 above, rather closely bristly-setose on the nerves beneath, otherwise 

 glabrous; petiole J-1 in. long, finely pubescent, without bristles; 

 stipules lanceolate, erect, puberulous, IJ lin. long, llacenies lateral,. 

 2 in. long, on rather stifi" naked puberulous and sparingly bristly 

 peduncles |-1 in. long, with numerous rather lax male flowers above 

 and usually 2 basal female flowers; pedicels all solitary to and shorter 

 than their bracts; bracts all thinly membranous, males 1 lin. long, 

 narrow-lanceolate, reflexed, sparingly pubescent, females ovate-lancec>- 

 late, 2-2 J lin. long, distinctly 1-o-toothed on each side ; bracteoles 

 similar but smaller, entire or 1-2-toothed on each side. Male sepals 3, 

 oblong, subacute, puberulous outside. Stamens 3 ; filaments very short. 

 Female calyx-segments C, 2-seriate, oblong, very accrescent but not at 

 all indurated, at length over h in. long, pinnately 4-lobulate on each 



