2<22 Mr. D. Don's Descriptions of new Genera and Species 



sesquilineam v. 2 lineas lata. Flores laxe diffuseque corym- 

 bosi. lnvolucri squamis exterioribus lineari-subulatis, apice 

 triquetro spinuloso-mucronatis, patulis, squarrosis ; intimis 

 membranaceo-dilatatis, extus pilosiusculis. Flosculi radio 

 subrotundo-ovali, albo ? Caetera ut in prascedente. 



This is intimately allied to the preceding species, of which it 

 may ultimately prove to be only a variety ; but I must leave 

 this question undecided until further observations shall deter- 

 mine whether the characters by which they are here separated, 

 are permanent. 



** Pappi radiis apice ciliatis. 

 3. T. cordifolium, foliis subrotundo-cordatis margine setaceo- 

 spinosis, floribus subternis. 



Triptilion cordifolium. Lag. in Bot. Reg. t. 853. 



In Chili. D. Place, q. 



Herba radice tenuissime fibrosa, annua, diffuse ramosissima, 

 la-te virens. Caules filiformes, valde flexuosi, pubescentes. 

 Folia sparsa, sessilia ; mferiora subrotundo-cordata, am- 

 plexicaulia; superiora subrotunda v. rhombea ; cartilagi- 

 neo-membranacea, costa prominente venisque reticulatis 

 ad oram conrluentibus, hinc marginata, utrinque leviter 

 pubescentia, viridia, margine spinis longis setaceis, rectis, 

 divaricato-patulis, solitariis, geminis, aut fasciculatim ter- 

 natis armata, ad apicem semper trinis approximatis, et 

 tunc tricuspidata. Flores numerosi, dispersi, in apice ra- 

 mulorum subsolitarii v. terni, sessiles. Involucrum virens. 

 pubescens, polyphyllum, imbricatum, squarrosum : squa- 

 mis lanceolatis, spinoso-mucronatis, carinatis, inrequalibus. 

 Receptaculum punctum villosum. Flosculi 5, hermaphro- 

 diti, bilabiati, tubo luteo ; labio interiore bipartito, demum 

 revoluto, luteo : laciniis lanceolatis, acuminatis, primum 



conglutinatis ; 



