iin ati alg A AE 
This is the principal or prototype section, and consists 
of about thirty recorded species, the great majority of which 
belong to America. In them the root is almost always 
perennial, the stem generally herbaceous, often very tall, 
rarely of a woody consistence, the leaves sometimes oppo- 
Site, sometimes alternate, commonly three-nerved or with a 
triple-branched nerve, frequently rigid and roughened like 
shagreen, the flowers yellow and usually disposed in co- 
rymbs. It is discriminated from Harpatium and Leieuta, 
the other two sections, by a pappus of two jointed opposite 
caducous pales, by a two-ranked calyx which is higher 
than the disk of the corolla, and composed of herbaceous 
irregularly imbricated concentrically diminishing squar- 
rosely diverging leaflets. This group is exemplified by Hz- 
LIANTHUS pubescens (vol. 7. fol. 524.) of our Register. 
Il. HARPALIUM. Cor. radiata: disco hermaphrodito numerdso re- 
gulari; radio neutro simpliciligulato. Cal. hemisphzericus, arcté imbricatus, 
disco brevior, foliolis subcoriaceis ovalibus obtusis inappendiculatis. Recept. 
convexum, paleis subfoliaceis, disco brevioribus, semiamplectentibus, ob- 
longis, obtusis. Germina compressa, obovato-oblonga, hispida: pappus 
membranaceus uniseriato-pluripaleaceus caducus, paleis 2 magnis uno antico 
altero postico, reliquis lateralibus parvulis oblongis. Radiz flosculis ligula 
lata, stylus 0, pseudo-germ. ovulo nullo. Cass. 1. c. 20. 300; (é gall. vers.) 
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 regularly imbri- 
cated unappendicled leaflets shorter than the disk of the 
corolla, and by the round-pointed palez of the receptacle. 
It consists at present of three published species, viz. aureum 
(Heurantauus aureus. Kunth nov. gen. et spec.), truxillense 
H. truxillensis. Kunth l. c.), and rigidum, which is the 
Henianruus atrorubens (vol. 6. fol. 508.) of the present 
publication. It seems that M. Cassini was utterly unap- 
prized of the true synonymy of the species. 
Tl. LEIGHIA. Cor. radiata: disco hermaphrodito, multifloro, tegu- 
lari; radio neutro simplici ligulato. Cal. turbinatus, altior disco, foliolis 
numerosis, regularitér et arcté imbricatis, oblongis, coriaceis, appendice 
terminatis herbaceo foliiformi lanceolato 1-nervi recurvo-patente. Recept. 
convexissimum y. conoideum, pauld elevatum, paleis membranaceo-foliaceis, 
brevioribus disco, amplectentibus, lanceolatis. Sem«. oblonga, bilaterali- 
compressa, hispidula: pappi radii plures serie haud interrupta contigui, 
persistentes; anticus et. posticus plurimtm czteris longiores triquetro-filiformes 
scabri (barbellulées); laterales valdé breviores inxquales dissimiles irregu- 
lares paleacei, oblongi aut lanceolati, apice dentati. adit flosculis pseudo- 
germen longum, stylus 0, ligula emarginata. Cuss, l. c, 25, 435; (¢ gall. 
vers. ) 
VOL. IX. G 
