Bryophyten. 



675 



der grösseren Gattungen usw. in den verschiedenen Regionen, die 

 Fertilität und die Herkunft der Moose usw. beleuchten. Arnell. 



Robinson, C. B., The geographic distribution of Philip- 

 pine Mosses. (Philippine Journ. Science. C. Botany. IX. p. 199 — 

 218. 1914.) 



In the distribution of the mosses one finds a large difference 

 between the flora of the Mountain Province and the other areas. 

 Among the mosses found in the Philippines, 111 are confined 

 to the mountain province and 164 are not found in that part, 76 

 occur in both areas. When we consider the endemic species, 51 

 occur in the mountain province, 72 not and 13 are found in 

 both areas. 



The following table shows the occurrence of the non-endemic 

 mosses in other regions: 



So far, then, as the moss flora can be taken as a criterion, it 

 seems clear: 



1 That the percentage of endemism in Philippine species is 

 very high. 



2 That the Mountain Province is botanically a natural subdivi- 

 sion of the Philipp in es. 



3 That the flora of the rest of the Philippines is overwhel- 

 mingly Malayan. 



4 That the flora of the Mountain Province can not be considered 

 strictly Malayan but is related to it in much the same way as is 

 that ofSikkim, Nepal or Khasia. 



In the second part of the paper the author considers two im- 

 portant questions. 1. Whether any species of mosses, whose focus 

 of distribution in the Philippines appears to be the Mountain 

 province extend to the south along definite lines, in general those 

 of the various ranges or broken ranges of mountains. There are 76 

 species found both in the Mountain Province and elsewhere in the 

 Philippines, but 63 of these are known outside the limits of the 

 Archipelago, and all except four of these are Malayan. The dis- 

 tribution in the Philippines of the thirteen endemic species is 

 listed. A general consideration of the species of the genera con- 

 cerned, as well as of the Philippine localities cited, appear to 

 show that in two cases it is impossible to give an opinion as to 

 the direction in which they migrated, for six species it is more 

 likely, that they have originated farther south and thence migrated 

 to the Mountain Province, for the remaining five it is more pro- 

 bable that they originated in that Province and thence have spread 

 farther south, along two lines of distribution. 



