An Overlooked Species of Dryopteris. 
CARL CHRISTENSEN. 
During the elaboration of the second part of the 
Monograph of the genus Dryopteris, published in 1920, 
my attention was often drawn to the Cuban species 
described in 1902 as Polypodium cryptum Underw, & 
Maxon, which, from the figure and the characters 
ascribed to it, appeared to be a species of Dryopteris of ~ 
the subgenus Goniopteris. Unfortunately my work was 
greatly interrupted by the war, and in the final revision 
of the manuscript I totally forgot this species. Mr. 
William R. Maxon had, however, come to the same 
conclusion as to its relationship and he on his own initia- 
tive, sent me very recently a portion of the type of 
P. cryptum together with parts of other specimens col- 
lected by Shafer in 1910. An examination of these 
plants shows at once that the species must be referred 
to the subgenus Goniopteris. It may therefore be called: 
Dryopteris crypta (Underw. & Maxon) C. Chr. & 
Maxon, comb. nov. 
Polypodium cryptum Underw. & Maxon, Bull. Torrey 
Club, 29: 579. fig. 1902 
CusBa (Prov. Oriente): Vicinity of Baracoa, Feb. 
1-7, 1902, Pollard, Palmer & Palmer 231 (type, U. S. 
Nat. Herb. no. 403232). Rio Guayabo, “above the 
falls,” alt. 450-550 meters, in damp shaded places 
among large rocks January, 1901, Shafer 3720. Camp 
La Gloria, south of Sierra Moa, December 24-30, oe 
Shafer $173. Rio Yamaniguey to Camp Toa, 
pee meters, on clay bank, Feb. 22-26, 1910, per 
The original description and drawing give a good idea 
of this small species. It falls under the section Aster- 
ochlaena of the subgenus Goniopteris, but it is apparently 
quite distinct from all other species of that group, and 
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