12 Mr. J. Ball on the genus Leontodoh. 



shorter from the base upwards, and ultimately the radiated star 

 with which each is crowned becomes nearly sessile. 



11. X. tenuiflorus, D.C. Prod. Radice simplici, interdum 2-3-fur- 

 cato ; foliis oblongo-linearibus, integerrimis, obscure virentibus ; 

 pilis rigidis stellula brevi coronatis, obtectis, scapo sparsim squa- 

 moso, versus basin folio unico lineari seu oblongo-lineari instructo, 

 glabro, vel pilis stellulatis paucis adsperso, superne, cum involucri 

 squamis lineari-lanceolatis, pube rara brevissima subincano ; ache- 

 nio breviter rostrato, praesertim superne muricato. 



Hab. in calcareis subalpinis Insubriae. Legi juxta Lacum Larium 

 copiose plerisque locis. {Monte Crocione, prope Tremezzo, Villa 

 Arcolani.) 



H-i. foliis versus medium sinuato-dentatis. 



Habui ex Monte Salvatore prope Lugano comm. E. Thomas. 



Syn. Apargia tenuiflora, Gaud., descr. ex spec, a Monte Sahatore 

 quae nobis ad varietatem spectare videntur, cum forma Alpium 

 Insubrise solennis gaudet foliis integerrimis/cseterum descr. Gau- 

 diniano omnino conformis. 



The less numerous hairs crowned with a shorter star might 

 not suffice to distinguish this species^ but the presence of scales 

 and a cauline leaf on the stem, the narrower and longer invo- 

 lucral leaflets, and the more beaked and rougher fruit, furnish 

 abundant points of specific distinction which have not been suffi- 

 ciently pointed out. 



This and the preceding species fall into the section Apargia 

 of Koch ; but that group, which is founded on a difference in the 

 structure of the inner rays of the pappus, which in these are flat- 

 tened and serrulate at the base, while in the succeeding species 

 they are feathered throughout, appears to me quite artificial, as 

 in all other important respects it is closely allied with the true 

 Asterothrices ; but I find that if the pappus alone be considered, it 

 is scarcely correct to separate these from the preceding group 

 which Koch has termed Dens leonis. All the rays of the pappus 

 are not feathered in L. incanus and L. tenuiflorus, for I have 

 always found a few short scabrous hairs ; so that in the structure 

 of the pappus these species exhibit a nexus between the two 

 groups, which it might otherwise be desirable to distinguish as 

 separate genera. 



** Pappi radii e basi plumosi, exteriores breviores interdum scabri. 



12. L. saxatilis, Reich. (?). Radice crasso, fusiformi ; foliis antror- 

 sum sinuato-dentatis pilis stellatis vestitis ; scapo pilis raris ad- 

 sperso ; involucri laxiusculi foliolis lineari-lanceolatis, acutiusculis, 

 glabris aut margine et dorso pilis brcvibus rigidis ciliatis, in series 

 4-5 baud sequidistantibus instructis ; achenio longe rostrata, prse- 

 sertim in rostro muricato. 



