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



bilabiati, lactei ; labio exteriore petaloideo, orbiculato, ob- 

 tuse triclenticulato, 4-nervio, patulo ; interiore bipartito : 

 segmentis lanceolato-attenuatis, apice obtusulis, revolutis. 

 Anthem appendicula ovato-lanceolata, acuta, membrana- 

 ceCi terminatee, basi bisetae : setis linearibus, acutis, com- 

 planatis, simplicibus, ipsa, anther^ fere duplo brevioribus. 

 Stigma bipartitum : segmentis recurvis, apice truncatis, 

 minute papillosis. Achenia trigona, undique villosissima. 

 Pappi radiis 3, paleaceis, linearibus, canaliculars, caducis : 

 apice recurvato, ciliato, niveo. 



This curious genus agrees with Proustia, before described, in 

 the definite number of its florets, in its hairy receptacle, and 

 in its imbricate involucrum ; but I have placed it here prin- 

 cipally on account of the structure of its pappus, although the 

 difference of this organ is more apparent than real : for the 

 palese, which crown the fruit of this genus, are evidently formed 

 by the confluence of innumerable fibres, whose extremities even 

 in this instance are free. 



Trib. 2. Jungete. Receptaculum paleatum, paleis distinctis. 

 Flosculi uniformes, bilabiati, hermaphroditi. Stigmata so- 

 luta, angusta, obtusa, vix papillosa. Frutices folds scepiiis 

 lobatis, floribas paniculatis. 



Jungia, L. 



Dumerilia. Lag. et Dec. 



Martrasia. Lag. Amen. Nat. 1. p. 36. 



Involucrum simplex. Pappus plumosus. 



Involucrum simplici orcline polyphyllum, basi squamulis aliquot 

 munitum : foliolis aequalibus, basi callosis. Receptaculum 

 paleis distinctis, involucri squamis conformibus copiose re- 



fertum . 



