of the Class Composite. 179 



constituting a distinct genus, to which, it is very probable, the 

 Hypocharis sonchoides of M. Kunth should also be referred. 

 From Ilypochairis, which must now be limited to II. glabra and 

 minima, it will be necessary to separate H.radicata and maculata, 

 essentially distinguished by having the pappus uniformly stipi- 

 tate. This division, first proposed by Scopoli under the name 

 of Achyrophorus, has been very properly adopted by Gaertner. 

 The genus Seriola of Linnaeus, the Acliyrophorus of Vaillant, 

 which also belongs to this family, is characterized by a simple 

 polyphyllous involucrum, and by the rays of the pappus being 

 dilated towards the base. 



Trib. 3. Lactuce^i. Heceptaculum epaleatum. Antherce basi 

 bidentatae. Pappus fugax, mollissimus, capillaceus. 



Chondrilla, L. 



Involucrum simplici ordine polyphyllum, connivens, basi squa- 

 mulis pluribus calyculatum. Heceptaculum nudum. Achenia 

 fusiformia, tuberculata. Pappus stipitatus. 



Involucrum simplici ordine poly-(8 — 12)phyllum, cylindricum, 

 connivens, basi squamulis pluribus (8 — 10) calyculatum : 

 foliolis aequalibus, margine invicem se imbricatis. Recep- 

 taculum nudum. Flosculi indefinite Antherce appendicular 

 ligulat& v. ovali diaphana coronatae, basi acute bidentatae. 

 Stylus hispidulus. Stigmata semicylindrica, obtusa, brevia, 

 crassiuscula, minutissime papillosa. Achenia fusiformia, 

 subtetragona, hinc convexa, inde sulcata, concaviuscula, 

 superne tuberculata, apice in stipitem longum filiformem 

 producta. Discus epigynus depresso-capitatus ! Pappus 

 fugax, tenuissime capillaceus : radiis duplici ordine copio- 

 sissimis, basi solutis. 



Herbae foliis radicalibus scepiiis runcinatis, floribus citri?iis,pedun- 



culatis. 



Sect. 



