47 



broad, bipinnatifid; pinnae lineaSlanoe- 

 toS hid - fori °f r ded '- 0"? n& minu?ely 



ghWSSi. "KS&SS 

 fronds delicate, iy 2 °-3' long-, broadlv oh 

 ong-ovate, bipinnate; pinnae S' long 

 i^ C ?°i ate; P in nules oblong-lanceolate 

 pointed, more or less pinnately incised 

 or serrate, distinct or confluent on sec 



frTpT^ nfe° dil i m fl»x-foemina £ 

 sp PI 1090 (1753). — Asplenium filix-foe- 



26 in ?1R^ nh 'A Sc ^ d Neuer J bot l (2): 

 ^6 (1806) —Aspidium filix-foemina Swz 

 — Nephrodmm asplenoides Mich x — and 



Ku.r^^,^ ™« Pflanzenk 

 Alk to Cal; Nebr. Based on Athyrium 

 4 519 cy A los 1 or H m Ledeb, FIRoS 

 4.519 ( 1 853 ) 4 — Asplenium filix-foemina 

 cyclosorum Rupr, D. C. Eaton in US 



pISttt™ T° 0 j h - Merid 6:331 (1879 >- 



fHYLLITIS Ludwig, Inst Hist Phvs 



Reg Veg- ed 2, 142 (1757) 



oJSol 1 r? ear ' confluent in pairs, which 



appear like a single sorus with the 



^«^l n - ausium opening- in middle. 



. \ SCOLOPENDSIUM Newm, Hist Brit 



Ferns ed 2, 10 (1844). 



Hart's-tongue; Caterpillar fern- 

 Hound s tongue fern. Stipes 2-6' long 

 Tbrillose below; fronds oblong-lanceolate 

 trom an auricled heart-shaped base, en- 

 tire or undulate, 7-18' long, 1-2' widp 

 bright g Can; Vt; Tenn; Alk? Synon- 

 ic&V frfi???™^ seoiopendrium I,, Sp PI 

 M . o -11 53) - — Scolopendrium vulgare J. 

 /iV?J? lth £, Mem ac R °y Sc i Turin 5:421 

 I \? -U, • scolopendrium Karst, Deu- 

 tsch PI ed 1. 278 (1880-3) 

 CAMPTOSORXTS Link, Hort Berol 2:69 

 i 1 o 3 3 ) . 



Sori oblong or linear, borne partly on 

 veins parallel to midrib, partly on veins 

 oblique to midrib. 2 sp. 



C. RHIZOFHYLLITS Link, Hort Berol 2: 

 69 (1833). 



Walking-leaf; walking fern; Wall link 

 Fronds evergreen, tufted, spreading or 

 procumbent, 4-9' long, lanceolate from 

 an auricled. heart-shaped or oft hastate 

 base, tapering above into a slender pro- 

 longation which oft rts at apex. Can- 

 Me; Minn; Kans; Ala; Ga. Synonyms- 



Antigramma rhizophylla J. E. Smith. 



Scolopendrium rhizophyllum Hooker. — 



Asplenium rhizophyllum L. 



Variety INT3QRMEDIUS Arthur, bot gaz 



8:200 t 3 (1883). 



Base acute, without proper auricles, 



with a single fibro-vaseular bundle in 



stipe. la- 

 Tribe ASFIDIEAE. Sori dorsal, round 



or roundish, on back or rarely on apex 



of a vein; indusium com membranous, 



rarely 0. 



*Without indusia. Phegopteris. 

 **With indusia. A — Indusia superior. 



Aspidium, Nephrolepis. 



**AA. — Indusia fixed by a broad base 



partly under sorus. Cystopteris. 



**AAA. — Indusia obscure; fertile fronrl 



much contracted, very unlike sterile 



Onoclea. 



**AAAA. — Indusia inferior. Woodsia. 



Genus PHEGOPTERIS Fee. 



Sori round, rather sm, borne on back 

 of the free veins below apex; stipe con- 

 tinuous with rtstock. Beech-fern, about 

 100 sp. 



Section EUPHEGOFTERI3. Veins 

 free. 



*Fronds triangular, bipinnatifid; pin- 

 nae sessile, adnate to a winged rachis. 



P. POLYPODIODES Fee, Gen Fil 24*5 

 (1850-22. B 2:345. 



Stipes 6-9' long; fronds longer than 

 broad, 4-9' long, 4-6' broad, hairy on 

 veins especially beneath; pinnae linear- 

 lanceolate, lowest pair deflexed and 

 standing forward, segs oblong, obtuse, 

 entire, basal ones decurrent and adnate 

 to main rachis; sori near margin. New- 

 foundland; Alk; Va; Mich; la; Wash: 

 Greenland. Synonyms: P. vulgaris Mett. 

 — Polypodium phegopteris L, Sp PI 1080 

 (1753). — Phegopteris phegopteris Undw, 

 Small, Torr cl b 20:462 (1893). 



i. HEXAGONOFTERA Fee. 



Stipes 8-18' long, stramineous, naked; 

 fronds as broad as long or nearly so. 

 7-12' long, slightly pubescent, oft finely 

 glandular beneath; upper pinnae oblong, 

 obtuse, toothed or entire, the very large 

 lowest pinnae elongate and pinnately 

 lobed; sori near margin or some be- 

 tween sinus and midrib. Can; 111; Ky; 

 Pla; La; Minn. Synonym: Polypodium 

 hexagonopterum Michx, Fl Bor Am 2: 

 271 (1803). 



**Fronds oblong* lanceolate, 3-pinnati- 

 fid; rachis wingless. 



P. AIiPESTRIS Mettenius, Fil Hort Lips 

 83. B 2:345. 



Rtstock short, thick, erect, or oblique; 

 stipes 4-10' long, with a few brown, 

 spreading- scales near base; fronds 1-2° 

 long; pinnae deltoid-lanceolate, lower 

 one distant and decreasing moderately; 

 pinnules oblong-lanceolate, incised and 

 toothed; sori small, round, submarginal. 

 Cal; BC; Mont. Synonyms: Polypodium 

 alpestre Hoppe, Taschenb 216 (1805). — 

 Aspidium alpestre Swz. 



***Fronds ternate, the 3 divisions pe- 

 tioled; rachis wingless. 

 P. DRYOPTERIS Fee. B 2:345. 



Oak fern. Rtstock slender, creeping; 

 fronds broadly triangular, 4-8' wide; the 

 3 primary divisions 1-2-pinnate; segs ob- 



