43 



sp. Synonym: Acrostichum thalictroides 

 U sp PI 1070 (1753). 



Tribe BLECHNEAE. Sori dorsal, lin- 

 ear or oblongr, borne on transverse veins 

 parallel to midrib; indusium fixed at 

 outer, opening- at inner, margin. 



* Veins free. Struthiopteris ; Blechnum 

 ** Veins more or less reticulate. Wood- 

 wardia. 



STRUTHIOPTERIS Scop, Fl Com ed 1, 

 168 ( 1760). 



Sori in a continuous band next midrib- 

 indusium elongate, formed of the re- 

 curved and altered margin of pinnae, or 

 submarginal; fronds of 2 sorts, elongate, 

 pinnate. Nearly 50 species, mainly of 

 south temperate zone. 



S. SFICANT Weiss, PI Crypt 287 (1770) 

 Deer fern, Hard fern. Cal; Alk. 

 Synonyms: Osmunda spicant L sp PI 

 1066 (1753). — Lomaria spicant Desv Mag 

 Gesell Nat Fr Berlin 5:325 (1811). — 

 Blechnum boreal e Swz. Schrad J bot 

 1800 (2): 75 (1801).— Blechnum spicant 

 J. F. Smith, Ac roy sci Turin mem 5:411 

 (1793). 



s&EeioruaE l. 



Sori linear, elongate, continuous near 

 midrib; indusium continuous; fronds pin- 

 nate. Near 20 sp. 

 B. SESEUMTUM Richard. 



Stipes 6-12' long, stout, erect, nearly 

 naked; fronds oblong-lanceolate, 1-1 y 2 ° 

 long, 3-6' broad, with 12-24 pairs of dis- 

 tinct linear-oblong pinnae, margins finely 

 incised; texture coriaceous; veins very 

 fine and close, fertile pinnae narrower. 

 Fla. Synonym: Blechnum angustifolium 

 Willd. 



Genus WOODWARDIA Smith. 



Sori linear or oblong, forming chain- 

 like rows; indusia separate. Chain fern. 

 Six sp. Named for Thomas J. Wood- 

 ward, an English botanist. 



Section EUWOODWAEDIi. Fronds 

 uniform, veins forming at least one ser- 

 ies of areolae between sori and margins. 

 ' \ CSTASZISSCI, Brack, FUS Exp 138. B 

 2:344 as radicans. 



\v„ RADICANS Am, mem ac Turin 5:412. 

 B 2:344. Da 20. Baja! Greene, Cal ac b 

 2:415 Cruz. 



\ SFINITXiOSA Mart & Gal, Mem Ac 

 Brux 15 (5): 64 (1842). 



Caudex stout, erect, rising a little 

 above ground; stipes stout, 8-12' long; 

 fronds 3-5° long, subCoriaceous, pinnate: 

 pinnae 8-15' long, 2-4' broad, oblique to 

 rachis, pinnatifid nearly to midrib; segs 

 : oinulose-serrate; veinlets forming a 

 single row of oblong sorus-bearing areo- 

 lae next midvein, besides a few oblique 

 < apty areolae outside the fr'ing ones, 

 thence free to margin. Cal; Ar; Baja! 

 Synonym: W. chamissoi Brock, in Wilk- 

 es' US Expl Exp 16:138 (1854). 



Woodward'ia radicans americana 

 Hook, sp Fil 3:67 (1860). 



Washing-ton to Baja Cal.; Arizona. 



Section ANCHZSTEA Fronds uniform, 

 veins free between sori and margins. 

 W. VIRGINICA J. E. Smith. 



Stipes stout, 12-18' long; fronds oblong- 

 lanceolate, 12-18' long, 6-9' broad; pin- 

 nae linear-lanceolate, 4-6' long, 



broad, cut nearly to rachis into linear- 

 oblong lobes. Can; Fla; Mich; Ark. 

 Synonyms: W. Banisteriana Michx.— - 

 Blechnum Carolinianum Walt. — B. Vir- 

 ginicum L. — Doodia Virginica Presl. 



Section LORINSERIA Presl. Fronds 

 dimorphous-, veins everywhere forming 



W. ANGUSTIFODIA J. E. Smith. 



Sterile frond with slender stipes, 9-12' 

 long, 6-8' broad, deltoid-ovate, with num 

 oblong-lanceolate sinuate pinnae; rachis 

 broadly winged; fertile frond with an 

 elongate, castaneous st; pinnae 3-4' long, 

 narrowly linear. Me; Fla; Mich; Ark. 

 Synonyms: W. onocleoides Willd. — W. 

 areolata Moore. — Acrostichum areolatum 

 L. 



Tribe ASFLENIEAE. Sori dorsal, lin- 

 ear or oblong, oblique to midrib, or rare- 

 ly parallel with it; indusium fixed by one 

 margin to veinlet, opening at the other, 

 sometimes double. 



* Veins free. Asplenium; Athyrium; 

 Phyllitis. 



**Veins reticulate. Camptosorus. 

 ASPLENIUM L. 



Sori on upper side of a fertile veinlet. 

 rarely on both sides, oblong or linear, 

 oblique, separate; indusium straight or 

 rarely curved. Near 350 cosmopolitan sp. 



Section ETJASFLENIUM. Veins free, 

 simple or branched; indusium straight 

 or slightly curved, attached to upper side 

 of a vein. 



*Fronds simple. 

 A. SEREATUM L. 



Fronds growing in a crown from a sh, 

 stout, erect rtstock, l 1 / 4-2%° long, 2-4' 

 broad, simple, spatulate or linear-oblan- 

 ceolate, margin crenulate or irregularly 

 but finely serrate, subcoriaceous ; midrib 

 prominent, keeled and often bk-ish-p be- 

 neath; veins closely placed, 1-forked; 

 sori elongate, following veins of upper 

 % of frond from near midrib halfway to 

 margin; indusia single, free edge entire. 

 Fla. 



**Fronds pinnatifid or pinnate below, 

 tapering to a point. 

 A. PINNATIFID UM Nut tall. 



Stipes tufted, 2-4' lg; fronds 3-6' lg, 

 1-2V 2 ' broad, lanceolate, pinnatifid, or 

 pinnate below, tapering to a slender pro- 

 longation above; lobes roundish-ovate, 

 or lowest pair acuminate; sori num. Pa; 

 111; Ky; Ala. 



T. EBENOIDEB R. R. Scott. 



Fronds 4-9' long*, broadly lanceolate, 

 pinnatifid, pinnate below; apex prolong- 

 ed and slender: divisions lanceolate from 

 a broad base, lower ones shorter; stipes 

 bk and polished, as is lower nart of 

 midrib, especially beneath. Ct; NY; 111; 

 Ala. 



***Fronds once pinnate. 



I. — Pinnae V^k' long, mostly blunt. 

 A. — Rachis chestnut brown or bk-ish. 

 A. EBENEUK Ait. 



Stipes tufted. 3-6' long, chestnut 

 brown, nearly naked; fronds 8-16' long, 

 linear-lanceolate; pinnae 20-40, lanceo- 

 late, subfalcate, or lower oblong, 

 long, dilated base auricled on upper or 

 both sides; sori oft 10-12 on each side. 

 Fla; Ky; Can. Synonym: A. trichoman- 



