of the Galapagos Archipelago. 213 



Very similar to the last ; still the several excellent specimens in Mr. Dar- 

 win's herbarium seem sufficiently distinct. S. affinis has very short petioles, 

 and its capitula are nearly thrice the size of those of S. gummifera, are broader 

 also in proportion, and of a campanulate form. 



167. Wedelia tenuicaulis, Hooh.Jil.; herbacea, pubescens, caule gracili 

 tereti erecto supern^ ramoso, ramis erecto-patentibus gracilibus, foliis 

 flaccidis petiolatis elliptico-oblongis acutis serratis basi cuneatis, pedun- 

 culis filiformibus erectis pilosis folia superantibus, capitulis discoideis 

 hemisphaericis, involucri squamis lat^ ovatis subacutis flosculos radii 

 vaginantibus, receptaculo paleaceo, floribus omnibus hermaphroditis, 

 disci paleis vaginalis, achaeniis pilosis bi-trisetosis. 



Hab. Albemarle Island, Mr. Macrae. 



Annua. Caules bi-tripedales, stricti, diametro pennae corvinae. Folia sparsa, altema, pa- 

 tula, membranacea, utrinque puberula. Petioli gracillimi i-2-unciales. Pedunculi 

 axillares, l|-3-unciales, filiformes. Capitula parva, depresso-hemisphaerica, \ unc. 

 lata. Involucri squamae exteriores paucae, 6-8 lin. longae, pilosae, nervosae. Flores 

 sub 10, omnes tubulosi, tubo gracili glabro. Achaenium maturum late obconicum, 

 nigrum, pubescens, turgidum, pappo rigido bi-trisetoso scabriusculo coronatum. 



The present species is closely allied to the fV. discoidea, Schlect., a West 

 Indian plant : they possibly form a new genus. 



168. J^geria gracilis, Hooh.Jil.; annua, patentim pilosa, caulibus plurimis 

 ascendentibus elongatis trichotomy ramosis teretibus gracilibus, foliis 

 patentibus sessilibus ovato-oblongis acutis obscurfe dentatis subhispido- 

 pilosis, pedunculis axillaribus filiformibus, capitulis depresso-sphaericis 

 discoideis, squamis involucri lanceolatis non vaginantibus pilosis triner- 

 viis, floribus omnibus tubulosis basi pilosis, achaeniis calvis. 



Hab. Charles Island, Charles Darwin, Esq. 



Herba ramosa, pedalis, ramis gracilibus. Folia inferiora uncialia, supeme gradatim minora, 

 membranacea, virescentia ; petiolo nuUo. Pedunculi erecti, 1 unc. longi. Capitula 2-3 

 lin. lata, seniora paleis persistentibus apice nigris onusta. Flores hermaphroditi ; radii 

 squamis involucri oppositi, 5-fidi ; styli ramis brevibus obtusis. Receptaculiun elon- 

 gato-conicum. Achaenium oblongo-lanceolatum, compressum, glaberrimum, corona 

 cupuliformi minima. 



2 f2 



