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. Wenera TENUICAULIS, Hook. fil.; herbacea, pubescens, caule gracili 
tereti erecto superné ramoso, ramis erecto-patentibus gracilibus, foliis 
flaccidis petiolatis elliptico-oblongis acutis serratis basi cuneatis, pedun- 
culis filiformibus erectis pilosis folia superantibus, capitulis discoideis 
hemispheericis, involucri squamis latè ovatis subacutis flosculos radii 
vaginantibus, receptaculo paleaceo, floribus omnibus hermaphroditis, 
disci paleis vaginatis, acheeniis pilosis bi-trisetosis. 
Hab. Albemarle Island, Mr. Macrae. 
Annua. Caules bi-tripedales, stricti, diametro penne corving. Folia sparsa, alterna, pa- 
tula, membranacea, utrinque puberula.  Petioli gracillimi 1-9-unciales. Pedunculi 
axillares, 15-3-unciales, filiformes. Capitula parva, depresso-hemispherica, 1 unc. 
lata. Involucri squame exteriores pauce, 6-8 lin. longe, pilose, nervose. Flores 
sub 10, omnes tubulosi, tubo gracili glabro. Achznium maturum lat? obconicum, 
nigrum, pubescens, turgidum, pappo rigido bi-trisetoso scabriusculo coronatum. 
The present species is closely allied to the W. discoidea, Schlect., a West 
Indian plant: they possibly form a new genus. 
168. Jaceria GRACILIS, Hook. fil.; annua, patentim pilosa, caulibus plurimis 
ascendentibus elongatis trichotom’ ramosis teretibus gracilibus, foliis 
patentibus sessilibus ovato-oblongis acutis obscuré dentatis subhispido- 
pilosis, pedunculis axillaribus filiformibus, capitulis depresso-sphzericis 
discoideis, squamis involucri lanceolatis non vaginantibus pilosis triner- 
viis, floribus omnibus tubulosis basi pilosis, achæniis calvis. 
Hab. Charles Island, Charles Darwin, Esq. 
Herba ramosa, pedalis, ramis gracilibus. Folia inferiora uncialia, superne gradatim minora, 
membranacea, virescentia; petiolo nullo. 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. Receptaculum elon- 
gato-conicum. Achenium oblongo-lanceolatum, compressum, glaberrimum, coroná 
cupuliformi minimá. 
2F2 
