V V 
D. cristata* marginalis Dav. Fertile fronds in a crown. 1-2^ 
feet long ; laminae elliptic-lanceolate, long acuminate, often mis- 
shapen ; sterile fronds proportionately longer than in D. cristata ; 
pinnae deeply veined, long acuminate, those of the sterile fronds 
rumpled ; lower pinnae as in D. cristata, upper as in D. marginalis ; 
sori small, near the margin, often abortive. Usually at the foot 
of declivities with D. marginalis above it, and D. cristata in the bor- 
dering swamp. Often found growing in clumps. Boxford, New- 
bury, Merrimac and Medford, Mass. ; Hampton Falls, N. H. ; War- 
ren, R. I., Dover, Me., M. L. Fernald ; and probably infrequent 
throughout our range. Middle of July. See Mr. G. E. Davenport 
in Botanical Gazette, December, 1894. 
V 
144. D. spinulosa (L.) Kuntze. Spiny Shield Fern. 
Fronds 1-2| feet long ; laminm bipinnate, ovate, acuminate ; pinnae 
elongated, triangular, oblique to the rachis, the lower-most broad- 
ly triangular ; pinnules oblique to the midrib, their segments with 
spinulose teeth ; stipe, with a few pale brown, early deciduous 
scales ; indusia without marginal glands ; soon withering. This 
is the typical form, var. vulgare Eaton, and is common in damp 
woods, at least near the coast. June. Europe. 
In some situations matured plants are found 3-5 inches high, 
answering to var. dumetorum. 
Illustrated by Anne Pratt. 
V V 
145. D. spinulosa intermedia Willd. Laminae broader than 
in typical plant, often tripinnate ; pinnae nearly at right angles with 
rachis ; pinnules more crowded and finely dissected, the next but 
one to the rachis often longest, especiall^on lowermost pinnae ; ul- 
timate segments less spinulose ; indusia furnished with marginal 
glands ; scales of the stipe brown with a darker center. North 
American. Late in June, and scattering through the summer. 
The lower pinnae of this variety are sometimes much dilated, 
the pinnules next the rachis reaching the length of four inches, 
corresponding to the dilated form of the typical plant. 
