Mr. J. Ball on the genus Leontodon. 17 



25. L. chilloensis, D.C. Hab. prope Quito. 

 Syn. Apargia chilloensis, H. B. K. 



Genus ex auctoribus valde dubium. 



26. L. collinus, Turczaninow. Hab. in Sibiria baicalensi. 



27. L. coronopifolius, Dsf. Apargia coronopifolia, Willd. 



28. L, dandaleus, Sieber. Hab. in Creta. 



29. L. glaber, Ucr. Hab. in Sicilia. 



30. L. macrorhizus, Steud. Hab. in Regno Neapolitano. 

 Syn. Apargia macrorhiza, Ten. 



31. i. megalorhizon, Forsk. Hab. ad Dardanelles. 



32. L. pinnatijidus, nob. Hab. in Regno Neapolitano. 

 Syn. Apargia pinnatifida. Ten, 



33. L. Preslii, D.C. Hab. in Sicilia. 

 Syn. Apargia ciliata, Psl. 



34. L. sublyratus, Merat. Hab. in Galloprovincia. 

 Syn. Forsan L. crispus, Vill., var. 



35. L. variegatus, D.C. Hab. Monte Video. 



Before concluding, I shall add a few remarks on the geogra- 

 phical distribution of the species. 



The entire genus belongs to the temperate regions of the old 

 world. Of the well-ascertained species, which alone need be 

 taken into account, a large proportion are confined to limited 

 areas of distribution. The single species which forms the section 

 Oporina is widely spread throughout the regions of the Scandi- 

 navian and Celtic floras, and may probably extend throughout the 

 entire boreal zone and represent the genus in the western hemi- 

 sphere. All the well-established subspecies and varieties of this 

 species are found in Britain. Of the eight species forming the 

 section Apargia, one only, L. hastilis, is spread over a wide area, 

 being particularly common throughout the region of the Ger- 

 manic flora. It is a singular fact, which 1 have already alluded to, 

 that the hispid form of the species is alone seen in Britain, while 

 the glabrous subspecies danubialis is equally common throughout 

 central Europe. One species of the section Apargia is confined 

 to the western portion of the Alps ', a second inhabits the alpine 

 region of eastern Europe, and a third, the Caucasian chain ; while 

 one other species probably extends throughout the whole sub- 

 alpine zone of the mountains of central Europe. Two species 

 appear to be confined to central and southern Italy, while the 

 last remaining member of the group seems limited to the valleys 

 of the maritime Alps. The section Asterothrix (if we should 

 therein include L. Boryi and L. hispanicus) includes ten species 

 which chiefly inhabit southern Europe. The two last-named be- 



Ann. Sf Mag. N. Hist. Ser. 2. Vol. vi. 2 



