1917] Butters,— Studies in Ferns — Athyrium 195 
Notre Dame Bay, August 22, 1911, Fernald and Wiegand no. 4285; 
rich shaded soil, Torbay, August 21-26, 1901, Howe and Lang no. 
1433; woods, Virginia Water, August’5, 1894, Robinson and Schrenk; 
low damp clearings, Grand Falls, valley of Exploits River, July 20, 
1911, Fernald and Wiegand no. 4283; Mc. Weils Cove, Bay of Islands, 
August 24, 1896, A. C. Waghorne no. 29; Birchy Cove, Bay of Islands, 
August 24, 1896, A. C. Waghorne no. 24; damp thickets, Bay St. 
George, August 5~7, 1901, Howe and Lang no. 1006a. ; 
QUEBEC: eastern granite slopes, Table-Topped Mt., Gaspé Co., 
August 9 and 11, 1908, Fernald and Collins no. 275 (typ ay: einen 
bogs, Mt.» Albert, Gaspé Co., July 21-23, 1906, Fernald and Collins 
no. she 
Mar moist baer Princeton, Washington Co., August 3, 1912, 
a Fadi Pr Sanfo rd (N. E.). 
EE. Adjacent pinnules varying irregularly from one another, 
irregularly lobed and toothed. 
H. Pinnules 5-8 mm. broad, 10-18 mm. long, joined by a broad 
membraneous wing, lobes of the pinnules broad and over- 
MG gta pas ey von A. angustum forma confertum. 
ATHYRIUM ANGUSTUM forma confertum, forma nov., foliis ac fertilibus 
ac sterilibus consimilibus, pinnis pinnulisque ‘inparibus, pinnis 
facia versus pinnatis, apicem versus pinnatifidis, pinnulis con- 
‘fertis ad 8 mm. latis, segmentis ordinis tertii imparibus confertis. 
A form of A. angustum corresponding in the irregular cutting and 
overlapping of the broad pinnules to A. Filix-femina var. latifolium 
abington, but with all the technical characters of A. angustum. 
Apparently this is a somewhat abnormal form without geographical » 
significance as appears from the following list of en 
QUEBEC: boggy subalpine woods, altitude 1000 m., Table-topped 
Mt., Gaspé Co., susie: 13, 1906, Fernald and Collins no. ae 5 (type). 
New Hampsuire: Hampton Falls, August 5, 1899, A. A. oe 
MassacHUSETTS: “Brockton, September 8, 1907, A. A. 
The New England specimens are not so far removed ri the 
ordinary var. rubellum as is the Gaspé specimen. 
HH. Pinnules very irregular in size and shape, with many long 
acute teeth which project in various directions 
A. angustum kaeian laciniatum. 
THYRIUM ANGUSTUM forma laciniatum, forma nov., frondibus ac 
seesibus ac fertilibus consimilibus pinnulis erosis dentibus 
spinulosis incompositis instructis. 
An abnormal form of fairly frequent occurrence, in which the frond 
looks as if it had been nibbled when young, some of the pinnules being 
wanting ted greatly reduced, and all of them tending to show great 
irregularity of form. The teeth of the margins of the pinnules are 
sii eae and acute, and are inclined to stand out ina very irregu- 
Jar and disorderly fashion. 
