ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 331 



the occurrence of Azolla caroliniana in China. It was found abundantly 

 in rice-fields and swamps at Hongkong by Boudinier. 



Ferns and Fern-allies of Costa Rica.* — H. Christ continues and 

 concludes his work on this subject, and treats of the following genera : 

 Asplenium, Lomaria, Cyathm, Alsophila, Dicksonia, Gibotium, Pteris, 

 Hypolepis, Lonchitis, Doryopteris, Gymnogramme, Saccoloma, Dennstmdtia, 

 Lindsaya, Gleichenia, Marattia, Botrychium, Lycopodium, and Selaginella. 

 Among these are twenty new species, here described. A plate gives 

 reduced figures of 13 species of Gleichenia, showing the node of branching 

 in the frond. Finally five new species from Guatemala are described 

 and one from South Brazil. 



North American Ferns. — L. M. Underwood f enumerates the ferns 

 that have been added to the flora of the United States from 1900 to 1905. 

 These amount to 47, apart from doubtful records, and are partly due to 

 the opening up of the tropical part of Southern Florida, and partly to 

 the closer analysis that has been given to such genera as Selaginella, 

 Isoetes, and Botrychium. Also the types preserved in European herbaria 

 have been examined by the author ; and the West Indian fern collections 

 now accumulated at New York Botanic Garden surpass in richness and 

 completeness any to be found in Europe. Among the five new species 

 are two from Florida that often grow together on limestone rocks, 

 Asplenium verecundum Chapm., and A. Curtissii Underw. These have 

 long posed under the names A. myriophyllum or A. rhizophyllum, both 

 of which came originally from the West Indies. E. Brainerd % records 

 the discovery of Nephrodium filix-mas at Hartland, Vermont, by N. 

 Darling. It was previously known in N. America in the north only — 

 Gaspe, Quebec, Nova Scotia, and Michigan ; and, save in the last-named, 

 was unknown in the United States. T. E. Hazen§ also records this 

 discovery — an addition to the flora of New England. Other ferns of a 

 northerly type are known from the town of Hartland. W. N. Clute |j 

 treats of tropical ferns in the southern States, giving notes on distri- 

 bution and suggestions for further work in these States. 



The Fern Flora of Connecticut.! — C. H. Bissell records 74 species, 

 independently of varieties, of ferns and fern allies from this State. Con- 

 necticut has an average width of about 60 miles from N. to S., and a 

 length of over 90 miles from E. to W. Its highest point is 2355 ft. 

 Three of the ferns here recorded, Gheilanthes lanosa, Asplenium pinnati- 

 fidum, and Asplenium montanum, are not known elsewhere in New 

 England, and these Connecticut stations are supposed to be the northern 

 limit of their range. In the United States, Marsilia quadrifolia has 

 hitherto only been recorded from Bantam Lake Station, Connecticut. 



Hybrid Ferns.** — G. E. Davenport describes a hybrid Asplenium 

 resembling A. Trichomanes in its brownish-black stipes and lower part 

 of rachis, and in the shape of its upper pinnae, and resembling A. Ruta- 



* Bull. Herb. Boissier, vi. (1906) pp. 177-92, 279-94. 



t Bull. Torrey Bot. Club, xxxiii. (1906) pp. 189-205. 



X Rhodora, viii. (1906) pp. 22-3. 



§ Fern Bulletin, xiv. (1906) pp. 25-6. || Tom. cit., pp. 24-5. 



i Tom. cit., pp. 1-11. ** Rbodora, viii. (1906) pp. 12-15. 



