Recent Fern Lirerature 89 
S. mexicana; Organ Mts., N. Mexico, 
S. eremophila; Mountain Spring, San Diego Co., 
California, 
S. arizonica; Santa Catalina Mts., Arizona, 
S. asprella; San Antonio Mts., California, 
S. leucobryoides; Providence Mts., California. 
S. Standleyi; Glacier National Park, Montana. 
All these new species represent segregates from the 
mass of forms formerly included under rupestris. Their 
differentiation now merely follows the gradual accumula- 
tion of more material, extensive field study, and discrimin- 
ating study in the laboratory. Some doubtful forms 
still remain, for the proper placing of which more 
material is needed; the attention of members who may 
be able to help is especially called to Mr. Maxon’s re- 
quest for specimens from the southern and western 
United States. 
CHRISTENSEN, Cart. Dryopteris species ei varieties 
novae. Repertorium Nov. Sp. 15: 24-26. 1917. 
Discusses a new species, D. rupicola, and varieties of 
D sancta from Santo Domingo. 
British Fern Gazette, Vol. 4. no. 6. June and 
September, 1920. 
Reports a resumption of annual a a doubling’ 
of subscription, and includes accounts of fern varieties, 
and methods of culture of the sort dear to the British 
amateur fern student. 
Mrs. E. D. W. Brown! has described in detail eight 
cases of apogamy which occurred in prothallia of Os- 
munda cinnamomea and O. Claytoniana grown from the 
spores on nutrient solutions in the laboratory. Only 
Brown, Elizabeth Dorothy Wuist, Apogamy in Osmunda eo m 
een Clay toniana. Bull. Torr. Bot. Club 47: 339-345, figs. 1-7. Aug. 
19 
