Dryopteris 



POLYPODIACEAE 



47 



50 



Map 14 



Dryopteris hexagonoptera (Michx.) C.Chr 



50 



Map 15 



Dryopteris noveboracens i s (L.) A.Gray 



M5 



Map 16 

 • ryYptens Thelypteris 



var pubescens (Lawson) A. R. Prince 



1. Dryopteris hexagonoptera (Michx.) C. Chr. (Phegopteris hexagon- 

 optera (Michx.) Fee.) Winged Woodfern. Broad Beechfern. Map 14. 

 Frequent in the southern half of the state, becoming less frequent north- 

 ward and even rare in some of our northern counties. This is a woodland 

 species found in all kinds of dry soils. It is found more frequently associ- 

 ated with black and white oak and only occasionally with beech and sugar 

 maple. 



Cent. Maine to w. Que. and Minn., southw. to Fla., La., Iowa, and Okla. 



2. Dryopteris noveboracensis (L.) A. Gray. {Aspidium noveboraceiise 

 (L.) Sw.) New York Fern. Map 15. This species is found only in 

 slightly acid soil, hence its zonal distribution. It is infrequent to local in 

 the northern part of the state where it usually occurs in black and white 

 oak woods. It is rare or absent in the Tipton Till Plain, becoming infre- 

 quent to frequent southward in the hard, white clay soil of beech and 

 sweet gum woodland. In the southern part of the state is is usually closely 

 associated with beech. 



Newf. to Ont. and Minn., southw. to Ga., Ala., and Ark. 



3. Dryopteris Thelypteris (L.) A. Gray var. pubescens (Lawson) A. R. 

 Prince. {Aspidium Thelypteris of Gray, Man., ed. 7, not Sw. ; Dryopteris 

 Thelypteris of Britton and Brown, Illus. Flora, ed. 2, not A. Gray; and 

 Thelypteris palustris of authors, not Schott.) Marshfern. Map 16. 

 Common in the lake area and infrequent south of it. In the lake area it is 

 common in tamarack bogs, sedge marshes, and on the low borders of lakes. 

 South of this place it is found in springy and marshy areas. 



Se. Newf., Que. to Man., southw. to Ga., Tenn., and Okla. 



4. Dryopteris marginalis (L.) A. Gray. {Aspidium marginale (L.) 

 Sw.) Leather Woodfern. Map 17. This species is, for the most part, 

 restricted to the outcrops of sandstone or nearby residual soils which are 

 the product of sandstone in the southern part of the state. Most of my 



