106 AMERICAN FERN JOURNAL 
Notes on A. palmeri were published in this Journal? a 
few years ago. 
PoLysTICHUM ACROsTICHOIDES (Michx.) Schott. In 
this Journal there was described* in 1913 a fern from the 
vicinity of Great Falls, Virginia (a few miles above 
Washington, D. C.), which was regarded by the describer 
Mr. F. C. Greene, as a hybrid between Polystichum 
acrostichoides and Dryopteris cristata. The plants “were 
found in company with a great number of typical P. 
acrostichoides, and with several plants of D. cristata 
growing a few feet distant.’”’ Since the figures accom- 
panying the description seemed to represent a plant 
differing in no important respect from some of the forms 
with incised or pinnatifid pinnae that P. acrostichoides 
often assumes, the writer expressed a desire to examine 
a portion of the material. To this request Mr. Greene 
very obligingly responded by presenting two typical 
fronds, a fertile and a sterile, to the National Her- 
barium. These entirely confirm the view that the 
plant in question is only an extreme condition of P. 
acrostichoides. There are no indications of D. cristata 
as a possible parent, nor were any definitely stated in 
the original description. Unfortunately the hybrid 
is listed as valid in the second supplement of Christ- 
ensen’s Index Filicum. 
POLYSTICHUM ANDERSONI Hopkins. An interesting 
extension of range for this species, previously known 
from British Columbia, Washington, and Montana, is 
noted in a specimen from Tracy Arm, Sumdum Bay, 
southeastern Alaska, collected August 17, 1921, by 
William S. Cooper (no. 50). The specimen, though 
consisting of a single poor frond, is unmistakably of 
this species rather than P. alaskense Maxon.‘ Tracy 
Arm is a short distance southeast of Juneau. 
23: 109. 1913. 
3 Amer. Fern Journ. 3: 83-85, figs. 1-7, 1913. 
4 
3 reser Fern Journ. 8: 35. 1918. See also, Amer. Fern Journ. 10: 2, 
