Dowell : New ferns described as hybrids 139 



to oblong, bipinnate ; pinnae oblong to oblong-lanceolate, mostly 

 broadest toward the middle, the lowest unequally ovate-lanceolate, 

 those near the middle of the blade most divided; pinnulae oblong 



■ 



or lanceolate, falcate, acute, large, incised, the lobes spinulose- 

 toothed ; sori slightly nearer the midvein than the margin, nearly 

 terminal on the veinlets ; indusia thin, glandular, not large, inter- 

 mediate in cell-structure between those of D. Goldiana and D. 

 intermedia. 



In general appearance this fern looks like a large overgrown 

 | D. intermedia, but it differs from this in having the thick dark 



scales characteristic of D. Goldiana and the sori nearer the mid- 

 vein. It differs from the Goldie fern in the cutting of the frond 

 and in having glandular indusia, while it resembles this fern in its 

 shape and size, in the shape of its pinnae and the falcate shape of 

 the pinnulae, and in the character of its scales. 



Type specimens are in the herbarium of the New York Botan- 

 ical Garden, collected by Professor L. M. Underwood, August, 

 1899, near Jamesville, New York, in a locality abounding in 

 D. intermedia and having occasional patches of D. Goldiana. 



Dryopteris Goldiana x marginalis hyb. no v. 



Rhizome short, thick, densely chaffy : fronds erect or ascend- 

 ing, 5-1 1 dm. tall; stipe 20-35 cm. long, densely chaffy at the 



base with 



with 



thin membranous scales, the latter extending on the rachis ; 

 blade bipinnate, abruptly acuminate, the sterile triangular-ovate 

 to ovate-lanceolate, 15-50 cm. long, 10-20 cm. wide, pinnate- 

 pinnatifid ; the fertile ovate-lanceolate to oblong-lanceolate, 30-75 

 cm. long, 20-35 cm. wide, bipinnate; pinnae ovate-lanceolate to 

 oblong-lanceolate, long-acuminate, broadest toward the middle ; 

 pinnulae oblong to oblong-linear, falcate, acute or obtuse, serrate 

 or incised, decurrent on the rachis, those on the lower side of the 

 basal pinnae sometimes conspicuously elongated ; son about mid- 

 way between the margin and the midvein, or nearer the margin, 

 indusia firm, glabrous, not large. 



In general appearance, as well as in detailed characteristics, 

 this fern is intermediate between its alleged parents. Large fronds 



suggest D 



marginalis, but all the specimens and the several plants examined 

 showed scales characteristic of both species, their sori are interme- 

 diate in position, and the indusia intermediate in character. Its 



