VOL. XVIII, PP. 205-206 SEPTEMBER 2, 1905 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW CLOAK-FERN FROM MEXICO. 

 BY WILLIAM R. MAXON. 



By permission of the Secretary of the Smithsonian Institution. 



Among the plants collected in Mexico by Mr. C. G. Pringle 

 in 1904 is the following undescribed fern which we regard as 

 one of the most clearly marked species discbvered in recent 

 years: 



Notholaena bryopoda sp. nov. 



A plant of medium size, the rigid fronds 8 to 20 cm. long, borne rather 

 closely from a fasciculate bulbiform rhizome thickly covered by bristly 

 ferruginous chaff with entire margins and with a darker median line : stipe 

 3 to 8 cm. long, seal brown, sinuose, slightly furrowed above, scantily 

 clothed with deciduous narrow attenuate chaff somewhat darker than that 

 of the rhizome : lamina 5 to 12 cm. long, lanceolate, coriaceous, for the most 

 part only bipinnate, both primary and secondary rachises channelled upon 

 the upper surface; pinnae lanceolate, exactly alternate throughout, dull 

 greenish and devoid of glandular or ceraceous covering upon the upper 

 surface, the larger ones about 2.5 cm. long with seven or eight pairs of 

 mainly simple narrowly oblong sessile pinnulae, only the two or three 

 lowermost pinnulae being pinnate with one or two pairs of small narrow 

 sessile segments; margins strongly revolute, partially concealing the black 

 ish sporangia at maturity by a dense coating of pale yellowish ceraceous 

 powder, subsequently somewhat reflexed. 



Type in the U. S. National Herbarium, sheet No. 461,305 ; collected from 

 " chalky banks at base of Sierra de San Lazaro, altitude 7,500 ft., State of 

 Nuevo Leon, Mexico ; November 7, 1904 ; C. G. Pringle, No. 8802." Known 

 only from the type collection. 



38 PKOC. BIOL. Soc. WASH., VOL. XVIII, 1905. (20H) 



