36 



E. B. Babcoc\ 



Transcaucasia, and the second occurs at higher altitudes from 

 France to Rumania. The third, aurea, is much less primitive and 

 occurs in various forms in the mountains of southern Europe 



CATOIMIA 



PHYLOGENY AND CHROMOSOME NUMBER 



AUREA 10 



HOOKERIANA 8 



PONTANA 10 



SIBIRICA to 



VISCIDULA 12 



PALUDOSA 12 



CROCEA 16 



BUNGEI 8 



POLYTRICHA 16 



CHRYSANTHA 8 



6UREJENSIS 8 



C0NY2AEF0LIA 8 



KASHMIRICA 12 



'^^ PRE-CATONIA 



Fig. 9. Phylogeny and chromosome number in Catonia. 



and northern Asia Minor. The 8-chromosome species fall into 

 tv^o groups, one with four, the other with six species. Of the 

 first group, blattarioides and alpestris are montane species of 

 southern Europe; the latter also occurs in Asia Minor, which 

 supplements the evidence from gross and chromosome morphol- 

 ogy that it had a common origin with C. hypochaeridea of 



