let. Treated as a section of Asplenium 



JL TMiYPT:E e BOrD r botanists ' 

 Linn Paris 6:266 (1827). 6SV> M6m S 

 Silvery spleenwort. Stipes lone, erect 

 stramineous; fronds 1-2 long 6-l J 

 broad, bipinnatifid; pinnae linear-lance- 

 olate; segs crowded, oblong, minutely 



? f, d; sori 5 ~ 6 pairs to each se S. 

 slightly curved lower ones often double 

 Can; Ga; Ala; Minn; 111. Synonyms:' 

 Asplenium thelypteroides Michx, Fl Bor 

 Am 2:265 (1803). Asplenium acrostich- 

 ?!*ln^ Swz V Schrad J bot 1800 (2):54 

 (1801), not Athyrium acrostichoideum 



0:00 (1800). 



Lady fern: Female fern. Stipes tuft- 

 ed, 6-12' long, stramineous or brownish: 

 fronds delicate, l%-3' long, broadly ob- 

 long-ovate, bipinnate; pinnae 4-8' long, 

 lanceolate; pinnules oblong-lanceolate, 

 pointed, more or less pinnately incised 

 or serrate, distinct or confluent on sec- 

 ondary. rachises by a very narrow incon- 

 spicuous margin; sori short; indusium 

 straight or variously curved Newfound- 

 land to Fla; Be; Cal; Ut; Nev; Ar; Ala. 

 Synonyms: Polypodium filix-foemina L, 

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

 mina Bernh, Schrad Neuer J bot 1 (2)- 

 26 (1806). Aspidium filix-foemina Swz. 

 Nephrodium asplenoides Michx. and 

 near 70 varieties which have been 

 named and described. 



A. CYCX.OSORUM Rupr. Beitr Pflanienk 

 Russ Reich 3:41 (1845). 



Alk to Cal; Nebr. Based on Athyrium 

 filix-foemina cyclosorum Ledeb, Fl Ross 

 4:519 (1853). Asplenium fllix-foemina 

 cyclosorum Rupr, D. C. Eaton in US 

 Geol surv W 100th Merid 6:331 (1879). 

 PHYI.I.ITIS Ludwig, Inst Hist Phys 

 Reg Veg ed 2, 142 (1757) . 



Sori linear, confluent in pairs, which 

 appear like a single sorus with the 

 double indusium opening in middle. 

 P. SCOIiOPENDRlUM Newm, Hist Brit 

 Ferns ed 2, 10 (1844). 



Hart's-tongue; Caterpillar fern; 

 Hound's tongue fern. Stipes 2-6' long, 

 fibrillose below; fronds oblong-lanceolate 

 from an auricled heart-shaped base, en- 

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

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

 yms: Asplenium scolopendrium L, Sp PI 

 1079 (1753). Scolopendrium vulgare J. 

 E. Smith, Mem ac Roy Sci Turin 5:421 

 (1793). S. scolopendrium Karst, Deu- 

 tsch Fl ed 1. 278 (1880-3). 

 CAMPTOSORTJS Link, Hort Berol 2:69 

 (1833). 



Sori oblong or linear, borne partly on 

 veins parallel to midrib, partly on veins 

 oblique to midrib. 2 sp. 

 C. KKXZOPSTT.X.TTS 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. 



1030 



Asplenium rhizophyllum L, 



Variety IJTTERMEDIUS Arthur, bot gaz 



8:200 t 3 (1883). 



Base acute, without proper auricles, 

 with a single nbro-vascular bundle in 

 stipe. la. 



Tribe ASFXDXEAE. 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. Cystopterls. 



**AAA. Indusia obscure; fertile frond 

 much contracted, very unlike sterile 

 Onoclea. 



*AAAA. Indusia Inferior. Woodsia. 



Gen.. 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 ET7PHEGOFTZRIS. Veins 

 free. 



*Fronds triangular, bipinnatifid; pin- 

 nae sessile, adnate to a winged rachis. 



P. POLYPODIODES Fee, Gen Fil 24$ 

 (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 1089 

 (1753). Phegopteris phegopteris Undw. 

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

 P. HEXAGONOPTERA 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; 

 Fla; La; Minn. Synonym: Polypodium 

 hexagonopterum Michx, Fl Bor Am 2: 

 271 (1803). 



**Fronds oblong lanceolate, 3-pinnati- 

 fid; rachis wingless. 



P. AXiFESTXXS 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. DRYOFTERIS Fee. B 2:345. 



Oak fern. Rtstock slender, creeping; 

 fronds broadly triangular, 4-8' wide; the 

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



