* 9 
pressed center. Rocky woodsy Common and well known July. 
Only in the United States, east of the Mississippi. 
Illustrated by Meehan, Series i, Yol. 2. 
a. Var. incisa is a form in which the pinnrn are much incised, 
and in fertile fronds nearly all of them fruit bearing. Occasionally 
the whole under surface of the lamina is covered with sori. Most 
common in recent clearings. 
127. D. aculeata Braunii (Spenner) Underw. Fronds thick, 
rigid and evergreen, 1-2| feet long, spreading ; laminae lanceolate, 
tapering both ways, bipinnate ; pinnules ovate to oblong, ttuncate, 
almost rectangular at the base, covered beneath with chaff and 
hairs ; indusium orbicular fixed by its depressed center ; stipe very 
shaggy. Randolph and Williamston, Vt., Small. Gorham, N. H. 
Deane. Common in Northern Maine, Fernald. August. 
Frequent by mountain brooks in Northern New England. A 
variety of the very variable D. aculeata which in one form or an- 
other is represented all over the earth. 
128. D. Noveboracensis (L.) Asa Gray. New York Fern. 
Fronds 1-3 feet long, gradually tapering from the middle both 
ways ; laminae once pinnate ; pinnae lanceolate, pinnatifid, the low 
.ermost pairs gradually shorter and deflexed j veins simple ; sori 
small ; indusia minute and glanduliferous. Very common in wood- 
lands. Middle of August. North America, east of the Mississippi. 
13 1. D. simulata Dav. Fronds 1-3^ feet long; laminae 7-22 
inches long, 2-7 inches broad, oblong-lanceolate, gradually, or in 
the fertile fronds abruptly narrowing to a long, acuminate apex ; 
pinnae elliptic-lanceolate, sessile, deeply pinnatifid, the lowermost 
wider and introrse ; pinnules only partially revdlute, but the whole 
pinna often conduplicate ; venation simple ; indusia glandular ; sori 
large ; spores bright brown ; bases of the stipes of previous years 
persistent. In sunny situations much resembling var angustum of 
A. filix-fcemina. Position and general form of lower pinme much 
as Phegopteris Phegopteris, causing them to appear deflexed after 
the frond has been subjected to pressure. Usually accompanies 
