Mr. J. Ball on the genus Leontodon. 9 



-l-I, + g. subsp. hyoaeroidesy foliis fere ad costam usque pinnati- 

 fidis, pinnis aiigustis, sinuato-dentatis ; herba viridi, glaberrima, 

 seu pilis nonnullis longiusculis adspersa. Legi in sinu alpino 

 Ti^ift dicto, prope Zermatt in Valesia. 



Syn. L. hyoseroideSy Welw. (?) 



— E. subsp. montanus, scapo crassiore, superne magis squamoso ; 

 foliis latioribus, minus divisis, viridibus ; involucri foliolis latio- 

 ribus. Achenia videntur paululum longiora et magis muricata. 



Habui a monte Fouli/ in Valesia ab E. Thomas, formam vix diver- 

 sam legi in alpibus Sti Gothardi, et in Pyrenaeis orientalibus. 



Syn. L. dubius, Reich. Apargia dubia, Hppe. 



The ordinary forms of the typical species and of the subspe- 

 cies danubialis and hyoseroides are easily distinguished from the 

 allied species by the irregular and unsymmetrical manner in 

 which the leaves are cut and divided ; the nearly entire-leaved 

 varieties however, especially those of the subspecies montanus^ 

 approach very near to L. pyrendicus, as has already been re- 

 marked, but I believe that the characters given in the leaves and 

 the fruit will always suffice to distinguish the two species. The 

 entire absence of a subspecies so widely spread as L. danubialis 

 from the region of the British flora, is worthy of particular re- 

 mark as bearing upon some of the arguments upon the question 

 of the origin of species derived from their distribution through 

 definite areas of space. 



6. L. caucasicusy Fisch. ? Radice pr8emorsa(?) ; scapo tenui glabro ; 

 foliis runcinato-pinnatifidis, lobis conformibus angulatis retrorsis, 

 cum involucro pilis raris simplicibus, vel nonnunquam furcatis, 

 adsperso ; involucri foliolis lineari-lanceolatis, acuminatis, achenio 

 erostri, vix (aut ne vix ?) muricato. 



Hab. in subalpinis Caucasi (D.C. Prod.). Habeo specimen unicum 



incompletum a cl. R. F. Hohenacker. 

 Syn. Apargia caucasica, M. Bieb. (?) ; Reich. Fl. Exc. 853 (?). 



The single imperfect specimen in my herbarium appears to me 

 to be in all probability the plant of Bieberstein, but there are 

 some slight differences between the description above given and 

 that of the author. My plant approaches very nearly in appear- 

 ance to some forms of L. hastilis + G, but I distinguish it by the 

 generally simple hairs, and still more certainly by the regular 

 and symmetrical divisions of the leaf, which resembles that of 

 Aposeris fcetida, Less., but the lobes are more decidedly deflexed. 

 The character here noted in the divisions of the leaf is of much 

 importance in the dehor acea. 



7. L. anomalus, nobis. Radice brevi, obliqna, puree fibrosa ; scapo 

 monocephalo, supra medium hinc inde squamis Hnearibus instructo, 

 cum foHis et involucro pilis rigidis bi-tri-uncinato-furcatis obtecto ; 



