Jones: Flora of Illinois, 8. Polypodiaceae 37 



1. Leaves of firm texture, often evergreen; vascular bundles of the petiole 5 

 or more; rhizom3 stout, conspicuously scaly. 

 3. Leaves 1 -pinnate, or nearly 2-pinnate. 



4. Sori along the margins of the obscurely crenate or entire pinnules; 

 leaves coriaceous; sandstone cliffs and wooded ravines, not uncom- 

 mon. Marginal Wood Fern D. marginalis (L.) Gray 



4. Sori near the midvein; pinnules toothed. 



5. Leaf-biades 20-40 cm. wide, ovate in outline, scarcely narrowed 

 below; pinnae broadest near the middle; rich woods in ravines; 

 rare; known from Fulton, McLean, Grundy, and La Salle coun- 

 ties. Goldie's Fern D. goldiana (Hook.) Gray 



5. Leaf-blades narrower, elliptical in outline, narrowed at the base; 

 lower pinnae broadest at the base; swampy woods, n. III., rare; 

 known from Lake, Kankakee, La Salle, and Ogle counties. Crested 



Wood Fern D. cristata (L.) Gray 



3. Leaves 2-3 -pinnate, the pinnules spinulose-toothed. 



6. Pinnae at right angles to the rachis; inner pinnules of the basal row 

 equalling or shorter than the next outer ones; leaves (at least the 

 rachis) usually with a few small scattered stipitate glands; indusium 

 with marginal glands; moist woods, locally throughout 111. except 



the e. and centr. counties. Common Wood Fern 



D. intermedia (Muhl.) Gray 



6. Pinnae oblique to the rachis; inner pinnules of the basal row longer 

 than the next outer ones; leaves and indusia not glandular; woods, 

 rare. Oregon, Ogle Co., M. B. Waite in 1883; Peoria, Brendel; 



Antioch, Lake Co., G. N. Jones 16507. Spinulose Wood Fern 



D. spinulosa (O. F. Muell.) Watt 



8. Phegopteris (Presl) Fee 



1. Leaves glabrous, ternate, the three divisions petioled; rachis not winged; 

 wooded ravines, rare; Ogle Co.; St. Clair Co. Oak Fern [Dryopteris 



linnaeana C. Chr.; D. disjuncta (Ledeb.) Morton] 



P. dryopteris (L.) Fee 



1. Leaves twice pinnatifid, pubescent or glandular beneath, the pinnae all 

 sessile, adnate to the rachis. 

 2. Rachis terete and wingless above the lowest pair of pinnae, these separated 

 from the next pair above; blades mostly longer than broad, short- 

 pubescent, 'especially on the veins; moist ravines, cliffs, and woods, 

 rare; Starved Rock, La Salle Co., Agnes Chase in 1901; "South Illi- 

 nois," without definite locality, Vasey. Long Beech Fern {Dryopteris 

 phegopteris (L.) C. Chr.; Thelypteris phegopteris (L.) Slosson; P. 



polypodtoides Fee} P. connectilis (Michx.) Watt 



2. Rachis winged above the lowest pair of pinnae by their adnate bases; 

 blades about as wide as long, or wider, the lower surface finely glandu- 

 lar, and often slightly pubescent; rich woods and ravines, not uncom- 

 mon. Broad Beech Fern P. hexagonoptera (Michx.) Fee 



