of the Galapagos Archipelago. 207 



Also a very distinct species, with much shorter leaves than L. tenui/olia, 

 and shorter cilia at the base: the peduncles too are more abbreviated and 

 stouter. 



153. Ageratum conyzoides, Linn. Sp. PI. 1 175. DeC. Prodr. vol. v. p. 108. 

 Hab. Charles Island, Charles Darwin, Esq. A very widely-diffused native of the tropics, 



both in the old and new world. Some of the specimens have no pappus whatever, 

 and in others the pappus is shorter than in the ordinary state of the plant. 



154. Erigeron tenuifolium, /TooA:. ^/. ; fruticosum, ramis infern^ denudatis 

 cicatricosis, foliis patentibus angustfe linearibus acuminatis basi ciliatis, 

 capitulis terminalibus pedunculatis subcorymbosis, pedunculis folio bre- 

 vioribus, involucri obconici squaniis linearibus pluriserialibus. 



Hab. Charles and James Islands, Charles Darwin, Esq. 



Rami lignosi, teretes, crassitie pennae anatinae, cicatricibus foliorum delapsorum subannulati, 

 superne subfastigiatim di- trichotome ramosi, cortice pallide fusco. Folia versus apices 

 ramulorum fasciculata, patentia, 1 unc. longa, vix ^ lin. lata, glaberrima v. parce pilosa, 

 marginibus subrecuryis basi ciliatis in ramum subdecurrentibus. Pedunculi plurimi, 

 ^ unc. longi, validi, in axillis foliorum summorum, inferiores longiores, unde corymbosi, 

 bracteati, bracteis in squamas involucrales gradatim desinentibus. Capitula obconica 

 V. subcampanulata, basi angustata, ^ unc. longa. Involucri squamae plurimae, gradatim 

 longiores, anguste lineares, subscariosae, post anthesin patentes v. reflexae. Recepta- 

 culum paulo convexum, papillosum. Flores radii pauci, ligula oblonga revoluta 3-nervi ; 

 disci tubo parce piloso, dentibus glanduloso-incrassatis. Stamina ecaudata. Stylus 

 fl. radii ramis linearibus, obtusis, marginibus incrassatis ; disci brevioribus, cono dorso 

 glanduloso terminatis. Achaenia compressa, subtrigona, puberula. Pappus 1-seriahs, 

 rigidus; setis inaequalibus, scabrido-pilosis, flavidis. 



This species and the following nearly agree with the character of Solidagu, 

 but the habit and inflorescence are entirely different, and the involucres are 

 neither cylindrical nor elongated. The scales of the involucre are more imbri- 

 cated and conical than in Erigeron, the flowers of the ray fewer and probably 

 yellow. Mr. Bentham, who has had the kindness to inspect both the Compositce 

 and Leguminosce of this curious collection, agrees with me as to the propriety 

 of including these in Erigeron, though they form a group in that genus quite 

 distinct from any other. 



