THE FERN BULLETIN 



69 



Azolla Caroliniana in Alaska. — So far as the 

 writer knows, Azolla Caroliniana has never been re- 

 ported from Alaska. The present record relates to 

 plants in the U. S. National Herbarium unaccom- 

 panied by an original label, and marked simply 

 "Alaska, Bischoff, 1808." 



An Additional Asiatic Fern in the United 

 States. — In the several articles in the last number of 

 the Bulletin, relating to the probable identity of As- 

 plenium Fcrrissi of Arizona with the Old World As- 

 plcnium alternans (Cetcrach Dalhousiac) mention 

 might have been made of the similar case of Aspleniwm 

 exiguum. This is a species, described from India by 

 Beddome in 1863, which according to Christensen 

 ranges from southern India to Central China. Several 

 students have been of the opinion that it is doubtfully 

 distinct from Asplenium Glennici Baker, described 

 from Mexico in 1874 and ranging to Conservatory 

 Canyon, in the Huachuca Mountains, Arizona, where 

 it was collected by Lemmon in 1882. The case is 

 stated at some length by the late C. W. Hope, writing 

 in the Bulletin of the Torrey Botanical Club for Feb- 

 ruary, 1899, (i<5:58-62). Hope, whose paper will be 

 found very interesting, had no doubt that the Asiatic 

 and American plants were of the same species, a con- 

 clusion which seems to be substantiaated by an ex- 

 amination of the material in the National Herbarium. 

 A number of similar instances might be cited of tropi- 

 cal ferns which are common to both hemispheres, — 

 species which even in these days of extreme segrega- 

 tion few writers would dare attempt to divide on 

 grounds of geographic distribution. As to A. Fcr- 

 rissi, its relationship to A. alternans was apparent to 

 the writer upon the publication of the figure with the 



