This is the principal or prototype section,' and consists 

 of about thirty recorded species, the great majority of which 

 X belong to Amenca. In them the root is almost alwavs 

 perennial, the stem generally herbaceous, often very, tab, 

 rarely of a woody consistence, the leaves sometimes oppo- 

 site, sometimes alternate, commonly three-nerved or with a 

 triple-branched nerve, frequently rig^d and roughened like 

 shagreen, the flowers yellow and usually disposed in co- 

 rymbs. It is discriminated from Harpalium and Leighia, 

 the other two sections, by a pappus of two jointed opposite 

 caducous palese, by a two-ranked calyx which is higher 

 than the disk of the corolla, and composed of herbaceow 

 irregularly imbricated concentrically diminishing squar- 

 rosely diverging leaflets. This group is exemplified by Hfr- 

 LiANTHus pubescens (vol. 7. fol. 624.) of our Register. 



II. HA RPALIUM. Car. ' radiata : diseo faerms^farodito Dnmeroto re- 



fulari ; radw neutro simplici ligolato. Cat hemisf^tericus, arcU imImeatUs, 

 isco foreTior.yb/toJts subcoriaceis oTalibus obtusis iniqppendiculatis. Jteeepf. 

 coDTexum, paleU subfoliaceis, disco brerioribus, i»nuaini^ectentibaa» «b- 

 longis, obtusis. Germina compressa, obovato-oblonga, liispida: pi^pp»» 

 membranaceus uniseriato-pluripueaceus caducns, paieis 2 maffuis uno anncp 

 altera postico, reliquis lateValibus parvulis obiongis. Radii noscnlis %>!» 

 lati, stylugO, pseudo-germ, orulo nollo. Catt.l. e. 30. 300; (egaJL^tn.) 



This Section is distinguished from the first and last by a 

 one-ranked pappus of several paleaceous radii, a hemi- 

 spherical calyx of coriaceous closely and regnla^ imbri- 

 cated unappendicled leaflets shorter than the disk of ^ 

 corolla, and by the round-pointed palese.of the ^ecepttti^ 

 It consists at present of three publulied species^ viz. dkarewn 

 (Heuanthus aureus. Kunih nev. gen. et spec.), irua^llense 

 H. truxillensis. Kunth L c), aod rigidam, wfdcfa is tfab 

 Heuanthus cUrorubens (voL 6. fol. 506.) (^ tibe present 

 publication. It seems that M. Cassini was ntteriy onap- 

 prized of the true synonymy of the species. 



III. LEIGHIA, Cor. radiata : dAteo hennflphrodito, BU>l*>Aon>>/^ 

 lari ; radio neutro simplici ligulato. Cat turbbatns, aHmr dww, /aWw' 

 numerosis, regularit^r et arctfe imbricatis, obloiigb, ' " 

 terminatis herbaceo foliifonni lanceolato l-nenri reci 

 GonTexissimum t. conoideum, pauld eleTatnm, ywiew BMitenftCi 

 brevioribus cUsco, amplectentibus, lancecdatiB. Stm^ ohloBgi, 

 compressa, hispidula: pappi ra^ ^lues sme liwd i 

 persistentes; onitciuet soshnuplariankm CdCenBloBg^ores 



\ ^ r 



scabri (harheUnUet) ; htterakt vabU brmortt inaequle* . ""flw ww^ 

 lares paljeacei^ oblong;! aut laaceolati, apice deatati. RmdUmaeA^p^mi^ 

 genmm loDgam, ttghu 0, Ugnhi ema^rinaia. Ctm. ^ e. W. 49fi; fr jwft 

 ver$.) 



VOL. IX. 



