192 Rhodora [SEPTEMBER 
with a tendency to have compound pinnules may be placed here. 
This variety is not found quite so far north as the typical form, and 
is more abundant southward. In situations where both this and the 
typical forms occur, it is quite possible that this form may represent 
merely a more mature state of the plant than the typical form (Plate 
123, figs. 14-16). 
A. angustum var. elatius occurs from Maine to Minnesota, south to 
Rhode Island, New York and Missouri. 
The following are the specimens of this variety in the Gray Her- 
barium: 
Maine: North Berwick, July 27, 1894, J. C. Parlin. 
New Hampsutre: Kensington, August 3, 1899, A. A. Eaton no. 
149; Nottingham, September 15, 1899, A. A. Eaton no. 303. 
VERMONT: open roadside, Repton, July 7, 1908, E. F. Williams. 
MASSACHUSETTS: in moist woods, Ipswich, Wm. Oakes; roadside, 
in sun, Rockport, August 15, 1897, E. F. Williams; in shady woods, 
Hyde Park, August 24, 1902, F. G. Floyd no. 1119A; open woods, 
Rowley, August 9, 1899, E. F. Williams. 
RuopeE IsLanp: dry open soil between Pilot Hill and Southeast 
Point, Block Island, August 20, 1913, Fernald, Hunnewell and Long, 
no. 8337. 
Connecticut: trap soil, Bluff Mountain, No. Guilford, August 19, 
1906, G. H. Bartlett. 
New York: Lake Mahopac, August 1848, herb. J. Carey; Lawrence, 
September 23, 1914, Orra P. Phelps no. 14; moist woods, Clayville, 
August 5, 1899, B. D. Gilbert; Castle swamp, Oneida, August 12, 
1906, H. D. House no. 2763, September 22, 1907, Nellie Mirick; 
Elmyra, September 22, 1907, E. J. Winslow. 
MicuicaNn: damp sandy ground, Rush Lake, Huron Co., August 
22, 1907, C. K. Dodge no. 2; Lansing, July 7, 1887, D. A. Pelton; 
Wallace, Menominee Co., August 22, 1884, J. H. Schuette. 
Minnesota: springy mud, St. Anthony (part of Minneapolis), 
July 20, 1888, J. H. Schuette. 
Missourt: shaded banks, Dumas, B. F. Bush no. 5889. 
CC. Fronds not dimorphic, coriaceous nor contracted, sori discrete at 
maturity. Forms of regions with cool summers, found also in 
dense shade in warmer regions. 
E. Pinnules diminishing in size regularly toward the tip of the 
pinna, oblong or linear-lanceolate, 3-5 times as long as wide, 
regularly and coarsely toothed or pinnatifid, the basal 
anterior segment usually largest, the others regularly dimin- 
ishing in size toward the tip of the pinnule. 
F. Pinnules standing at a wide angle to the rachis of the pinna, 
often connected by a membraneous wing along the rachis 
of the pinna, teeth or segments of pinnules obtuse. 
G. Pinnules lanceolate, subacute, strongly toothed or pinnati- 
fid, the segments toothed, membraneous wing along the 
rachis obscure or wanting....A. angustum var. rubellum. 
