638 Maxon : Pteridophyta collected in Alaska 



near the summit, without shade. Also no. 1519. Unalaska, 

 June 18; not common. 



Phegopteris Dryopteris (L.) Hoffm. 



No. 1 503. Among grass in crevices of rocky ledges ; vicinity 

 of Nome City, August 7. 



Dryopteris fragrans (L.) Schott. 



No. 1 501. In the crevices of loose rocks at the base of a 

 mountain 16 miles west of Nome City, August 20. It was found 

 in its best development at the base of the mountain, but smaller 

 forms occurred at the summit, alt. 800 feet ; not abundant, being 

 found in only the one locality. 



v Dryopteris aquilonaris sp. nov. 



Rhizome stout, erect, chaffy with bright-brown concolorous 

 scales ; stipes 4-7 cm. long, clustered, sparsely scaly ; laminae 

 5-8 cm. long, narrowly linear-lanceolate, with a few mostly lance- 

 olate scales ; pinnae about ten pairs, sub-opposite or alternate, 

 10-15 mm - long, glandular beneath; oblong-ovate, becoming 

 triangular-oblong below; pinnulae about four pairs to the pinna, 

 obliquely pinnatifid, the divisions with decurrent base, toothed ; 

 sori few, 2 or 3 to the pinnula ; indusium broadly reniform, 

 ragged. 



Type in U. S. National Museum, collected by J. B. Flett, on 



the summit of a mountain sixteen miles west of Nome City, Al- 



Au 



/ 



to Dryop- 

 However, 



there seem to be many well-marked differences distinguishing it 

 from that species. The plant is much less rigid, the lower pinnae 

 are not reduced gradually, the pinnae have decidedly fewer pin- 

 nules, and the pinnulae are much more dissected. There is no- 

 ticed also an absence of the dense scaly covering below so char- 



D.f* 



The 



indusia, too, are rather broader, more irregular, lack the narrow 

 sinus of fragrans, and apparently are not glandular at the margin. 

 I have seen no other material referable to the species here de- 

 scribed. It was not collected in quantity by Mr. Flett, who found, 

 I believe, only two plants. It is proposed to publish a figure ot 

 this species at another time. 



