186 Mr. D. Don's Descriptions of new Genera and Species 



place of the CichoracecB of the Northern hemisphere, to whom 

 they bear a striking analogy both in habit and structure ; but in 

 the Chilian Flora, where this family is more especially abundant, 

 they form nearly one-half of the whole class. 1 have ventured 

 to give the descriptions of a few interesting species from Brazil 

 belonging to this family, whose affinities seemed to justify their 

 insertion in this memoir. 



Trib. 1. Trixide^. Receptaculum epaleatum. Flosculi uni- 

 formes, bilabiati, hermaphroditi. Stigmata soluta, semi- 

 cylindrica, truncata, papillosa. Plant cb scepius fruticoscBt 

 foliis integris. 



Sect. a. Pappo piloso. 



Trixis. p. Br., Dec, Lag. 



Perdicii sp., L. 



Receptaculum villosum. Flosculi indefiniti. Involucrum aequale. 



Involucrum simplici v. duplici ordine poly -(5 — l6)phyllum, basi 

 squamis paucissimis s. bracteis amplis munitum : foliolis 

 subsequalibus. Receptaculum dense villosum. Flosculi in- 

 definiti (5 — 25) hermaphroditi, bilabiati ; labio exteriore li- 

 gulato, patulo, tridenticulato, 4-nervio (nervis rectis, late- 

 ralibus long^ intramarginalibus) ; interior e revoluto, bi- 

 partito : laciniis lineari-lanceolatis, binerviis, apice pube- 

 rulis. Anthera intubum connatae, basi bisetosae (setis sim- 

 plicibus) apice appendicul^ lineari lanceolate acutd co- 

 riaced coronatae. Stigmata semicylindrica, truncata, re- 

 curva, apice papillosa, nervo manifesto. Achenia subteretia, 

 nunc compressiuscula, undique papilloso-scabra : disco epi- 

 gyno concavo, parCim dilatato, margine elevato, calloso. 

 Pappus capillaris, caducus : radiis duplici ordine copiosis, 

 basi solutis, denticulato-scabris. 



Frutices 



