354 



Quite 



A.^ -^.^V ^ "V^ W'^ ^^ '^^ -^ ^-^ *-■ ^ ■ ^"^^ ^- '^- -— - — — - — 



folia, O. Hoffm.,* from the Belgi 

 neric with H. truncata: the oth< 



//. somalensis, 0. Hoffm.,t from Somaliland, having all the 



Hoffma 



H. stellidif 



land species to be insufficient for segregation fis a separate genus 

 from Herderia truncata. But his conclusions seem to have been 

 based entirely on the distinctions of the pai)pus, and not on the 

 structure of the involucres, which he appears to have overlooked. 



Hoffm 



H. stellulif 



for which the name Triplotaxis is proposed, in reference to the 

 number of series of the involucral bracts. Herderia^ as thus 

 restricted, and the new genus are described in the following. 



Herderia, Cass, Diet. Sci. Nat. Ix. 599; DC. Prodr. v. 13; 

 Benth. et Hook, f. Gen. PL ii. 232 (partim) ; 0. Hoffm. in Engl. 

 Pflanzonfam. iv- 5, p. 127 (partim). 



Capitida homogania, tubuliflora. Involucrum campanulatum, 

 e bracteis biseriatis constitutum, exterioribus foliaceis liberis, 

 interioribus in tubum lobatum membranaceum connatis. Recep- 

 tacuhim concavum, nudum. Corollae aequales, regulares, tubo 

 superne dilatato, limbo 5-lobato. Styli rami lineares, obtusi. 

 Achaenia leviter obliqua, 4~angulata, apice truncata. Pappi 

 setae circiter 5-9, breves, subpaleaceae, setis barbellatis 3-5 

 longioribus intermixtis — Herhae e basi ramosae, ramis plerumque 

 lus minusve procunibentibus. Folia alterna, breviter petiolata, 

 entata vel Integra. Capitula mediocria, solitariaj ramos foliatos 

 terminantia. F lores rnhri vel purpurei. 

 Species 2, Africae tropicae incolae. 



Folia spatulato-obovata vel oblongo-oblanceo- 



lata, apice truncata vel rotundata, parce 

 dentata, plerumque tenuiter pubescentia 

 vel villosa; achaenia glabra {^) H. truncata. 



Tolia lanceolata, acutissima, Integra, glabra; 



achaenia pilosa (2) -^- lancifoUa. 



1. H. truncata, Cass. Diet. Sci. Nat; Ix. 586 et 599 ; DC. Prodr. 

 V, 13, includ. vars. adscendens^ Tnulticaidis et leptorhiza; Oliv. 

 et Hiern in Oliv. Fl. Trop. Afr. iii. 298. 



Ampherephis senegalensis. Less, in Linnaea vi. 687. 



Herhae basi ramosa; rhizoma erectum, elongatum, gracile; 

 caules numerosi, procumbentes vel ascendentes, subsimplices vel 

 ramosi, plus minusve cano-pubescentes. Folia spatulato-obovata 



gustata 



cm 



membranacea, plerumque tenuiter pubescentia, subtus glandulis 

 nurtteroftis. instmcta ; nervi laterales utrinque 3-4, arcuati, vix 

 conspicui.* CTa^^ituia campanulata, circiter 6 mm. longa et dia- 

 metro, Involucri hracteae exteriores foliaceae, oblanceolatae, 



* Bull. Soc."Bot.Be]g.xl. 22 (1901). ^ ^~~ 

 t Engl. Bot. Jalirb. xxxviii. 199, t. 1 (1906). 



