I08 OUR NATIVE FERNS AN£> THEIR ALLIES. 



shaped base, entire or undulate, 7' — iS' long, i' — 2' wide, bright 

 green. (Scolopendrium Smith, Asfilenium scolopendrium L.) 

 Chittenango Falls and Jamesville, New York ; Woodstock, New 

 Brunswick (Sutton), Owen Sound, Canada (Mrs. Roy), Ten- 



XXI. CAMPTOSORUS Link. Walking-leAF. 



Sori oblong or linear, irregularly scattered on either side of 

 the reticulate veins of the simple frond, those next the midrib 

 single, the outer ones inclined to approximate in pairs, or to 

 become confluent at their ends, thus forming cropked lines. 

 Name from Gr. Ka^ntr6%, curved, and crcopo?, a heap. Includes 

 only two species. 



I. C. rhizophyllus (L.) Link. Fronds evergreen, tufted, 

 spreading or procumbent, 4' — 9' long, lanceolate from an auricled, 

 heart-shaped or often hastate base, tapering above into a slender 

 prolongation which often roots at the apex. Var. intermedzus 

 Arthur is an interesting form, diflering mainly feom the typical 

 forms in having the base acute, without proper auricles and 

 with a single fibro-vascular bundle in the stipe. {Antigramma 

 rhizophylla J. Sm., Scolopendrium rhizophyllum Hook., Asple- 

 nium rhizophyllum L.) New England to Wisconsin and south- 

 ward ; the variety in Iowa. 



XXII. PHEGOPTERIS Fee. Beech-fern. 



Sori small, round, naked, borne on the back of the veins 

 below the apex. Stipe continuous with the rootstock. Veins 

 free or reticulate. Name from Gr. (pnyo%, a beech-tree, and 

 Ttrepi?, a fern. Includes 95 species. 



§ I. EuPHEGOPTERlS. Veins free. 



* Fronds triangular, bipinnatifid; pinncB sessile, adnate to a 

 •winged rachis. 



I. P. phegopterls (L.) Unde, Stipes 6'— 9' long ; fronds 

 longer than broad, 4' — 9' long, 4' — 6' broad, hairy on the veins 

 especially beneath ; pinnse linear-lanceolate, the lowest pair de- 

 flexed and standing forward ; segments oblong, obtuse, entire, 

 thebasalonesdecurrentandadnateto the main rachis ; sori near 

 margin. (P. polypodioides Fee, Polypodium phegopieris L., P. 

 connectile Michx.) New England to Virginia and westward. 



