of the Class Composita. %9Q 



Nomen ad receptaculum crebrfe paleatum refert, a TrXeoy refertus, 

 et Kap<pos palea. ,, •-.; 



1. P. revolutus. 



In Chili ad Coquimbo. Caldcleugh. i? . . . 



This curious and well-marked genus has been referred to the 

 JungecB entirely from its similarity of structure in the parts of 

 fructification : for its habit certainly indicates no affinity to 

 Jungia, unless we regard the stipule-like appendages of the 

 leaves of Pleocarphus and some species of the former genus as 

 pointing out a connexion. \ >. mefioiiif > i 



Trib. 3. PoLYACiiYREffi. Receptaculum paleatum. Flosculi 



uniformes, hermaphroditi, bilabiati. Stigmata linearia, 



truncata, apice papillosa. Achenia difformia. HerbcE foliis 



pinnatifidis. ,(''V,'> ■ , • , ,. 



/ \ a. Fappo difformi. \ 



PoLYACHYHUs. Lag. ct Dcc. ,5 tv > V..'. 



Involucella tetraphylla, biflora, in capitulum congregata. Flos- 

 culi inaequales. Pappus flosculo interiori elongatus, plu- 

 mosus. 



Capitulum compositum, globosum, basi squamis aliquot ovato- 

 lanceolatis mucronatis rigidis munitum. Involucella plu- 

 rima, tetraphylla, biflora, paleis ovato-lanceolatis, mucro- 

 natis, lanugine interstinctis interjecta : foliolis imbricatis, 

 ovali-oblongis, apice emarginato-truncatis, scariosis, colo- 

 ratis, conniventibus ; exteriore latiore, basi gibbosd. Re- 

 ceptaculum partiale nudum. Flosculi singulo involucello 

 gemini, hermaphroditi, bilabiati, inaequales (exteriore mi- 

 nore) ; labio exteriore ligulato, obtuse tridenticulato, patu- 

 lo; interiore profundi bipartito: laciniis lineari-lanceolatis, 

 acutis, spiraliter revolutis. Antherce appendicuM lineari- 



lanceolatd 



