FILICRS. 4%' 



Bvb ORDtii I. POLYPODINE^— True Ferns. 



Sporangia collected in dots, lines', or variously shaped 

 clusters (son) on the back or margins of the frond or its di- 

 vision. Fruk dtffcf(seri) often curved, at least when young, 

 I'V a membrane called the involucre, or properly the indiisium. 



1. rOLY PODIUM, Linn. Polypody. 



»r». prtui, maavsy-aad pw*, foot; from the numerous fe«tl.ke branch** of ti-« 

 raofcetouk. 



Fruit dots round, naked, variously or irregularly scat- 

 tered over the back of the flat and expanded loaf-like frond 

 Veins simple, forked or pinnate, free. — Ruot-.*taV:. often 

 cvvtred with wool-liLe chaff, and with tvftcJ branches. 



* Drcr.dt'iii ipiy end dufi^ fHtnutifidf ettr g r te * : fruit-doit larpt. 



1. P. YULG/KE, L. Com7ifOH Polypody. 



JV'-r.d? oUonp. smooth. and pr^en on both sides, 6 to 10 incnci high: ih* di 

 rkfena tinea? oblong, obtuse, minutely and obaenrerv tOettod. 

 Becks, tomaon. Jn'y. 



•• Prondt 2 [litmatiftd, triat^uiJr, anWM'ili fi iiifrdoSa'WU nt f i t i - 



2. P. PjIEGOPTER-rS, L. B«'ich polypody. 



Stalk rpaafngly chaffy and .hwny ; /?vn.^ ;, 7i>:;;ra>ar in bntHna, longer tban 

 broad. 8 to t$ inebrt long hafrj on the v«j linear-bmreolate, eta* y 



av{TOx:iiK>i« ■.. the lowest { air d*£< xed ai d ^tending forw ar d* j their diTisiatu ' 

 ljiiecr-olilotij:. obtuse, entire, each bearing ab3at 4 f. nit-dots towards the bo.*« bLi 

 near the sanrgm. 



Tamp wr-ods, common. July. Rootetooks Blonder, btaekiaki 



3. P. KEXAGONOrTERUM, Miebx. Winged Polypody. 



Sialic unooth: fraud broadly triangular, the br.se * to 9 it>rhP3 broad. nsneUy 

 exceeding the length ; pmaa; rr.tht r distant, the. lower of the l&nceoiafa division* 

 tobthi d, di entreat and forming a conspicuous wing to the rachhj. 



Moi*t woods. Jr.ly. Sori very small, in 1 to 3 rows, 



* • • Frondi Umaic, the primary divUions twice pinnait. 



4. P. DRYOPTERIS, L. Thrcc-hranched Polypody. 



Stalk Pierder and brittle, smooth. 6 to 12 inches high : fronds smooth, pale, tight 

 preen. 4 to b inches wide ; the S principal di\isions widely spreading, the nltitntfr-- 

 obos oblong, obtnsr, nearly entire; fntMdtdt antrginal, finally in contact 



Dtep rctty Fi-Ods. coaiccn. July. Str* small, light brown. 



2. PTERIS, Linn. Brake. 



6r. pieron, awing, on account cf the prevalent pinnaia fronds. 



Fruit-dots linear, confluent laterally in a line which the 

 divisions of the frond, the continuous indusiam fixed at the 

 very margin, the inner edge free. Veins forked and fn 

 bearing the sporangia at their apex. — Fronds 1 to 3-pinnatfr 

 or decompound, rather coriaceoi(s 1 

 V2* 



