CRYPT0GAM1A F1LICES 579 



Fronds 12 to 16 or 20 inches long, anil 3 to S or 9 inches wide, in their outline 

 ♦•lliptic-lanccolate, or oMong, acuminate, somewhat tripinnate, smooth,— the pri- 

 mary divisions 3 to 5 inches long, and 1 to 2 inches wide, lance-oblong in their 

 outline, and acuminate, on short petioles,— the secondary divisions or leaflets 

 mostly distinct (the lower ones sub-petiolate), pinnatifidly incised, and theses"* 

 mods again incised-serrate, with the serratures cuspidate, or abruptly and sharply 

 acuminate ; common rachis partially sulcate on the upper side, somewhat chafty : 

 stipe 6 to 12 or 15 inches long, chaffy, the chaff in large membranaceous scales, 

 brownish tawny. Son rather large, numerous, somewhat in 2 rows on the sc_- 

 rnents, brownish; indusium orbicular-reniform, umbilicale in the centre. 



Hub. Moist woodlands: frequent. Fr. July. 



Ob** This is a rather stout fern, often 2 feel or more in height, and growing iu 

 tufts. It is probably identical with A. intermedium, and A. cristatum, of Authors ; 

 and I have some doubts whether it be specifically distinct from A. spinulosum t and 

 A. azulcatum, of Pursh* &c. 



7. A. asplkxioidks, Willd. Frond bipinnatc ; pinnules linear-lance- 

 olate, incised-serrate, the serratures 2 or 3-toothed ; sori oblong, lunate, 

 finally confluent. Beck, Hot. p. 451. 

 Ncphrodium asplcnioidcs, JMx. Am. 2. p. 268, 



AsPLKNlUM-LIKE AfiPIDIUX. 



Froruls 12 to 18 inches long, and 4 to 8 or 9 inches wide, in their outline oblong- 

 lanceolate, acuminate, bipinnatc, or bipinnatifid, smoo\\\,—-\\\t primary divisions 

 2 or 3 to 6 inches long, and 3 fourths of an inch to an inch and half wide, lance* 

 oblong in their outline, and acuminate, suhsessile— the secondary divisions orseg- 

 ments linear-lanceolate, or oblong, slightly confluent at base, or sometimes nearly 

 distinct, doubly and very unequally incised-serrate, or the principal serratures 

 broadish and 2 or 3-toothed ; rommoti rarhis striate-sulcatc with about 3 grooves 

 on the upper side, naked and smoothish; stipe 6 to 10 or 12 inches long, naked 

 and smooth. Sori oblong, at length lunately recurved, arranged in a double row 

 (the outer ends diverging) along and near the midrib of the pinnules or secondary 

 divisions of the frond,— the indusium bursting along the convex margin of the 

 s >ru8, and adhering at the opposite margin. 

 J lab. Moist woodlands : frequent. /V. July. 



Obs. The fructification of this has so much resemblance to that of an Aspleni- 

 urn, that it is calculated to puzzle young Botanists. Eight or nine additional spe- 

 cies are enumerated in the U. Stales. 



463. WOODSIA. Br. Autt. Gen. 818. 

 [Named in honor of Joseph Woods ; an English Botanist] 



Sori roundish, scattered. Indusium calyciform, open, with a multifid 

 or fringed margin, including the pedicellate capsules. 



1. W. ilvknbis, Bv. Frond pinnate, membranaceously pilose; di- 

 visions deeply pinnatifid ; segments ovate-oblong, obtuse ; sori submar- 

 ginal, finally confluent; rachis and stipe chaffy. Beck, Bot. p. 451. 

 Not? of Pursh. 

 Poly podium ilvense. Willd Sp. 5. p. 198. Ait. Kev:. 5. p. 505. 



Ilva, or Elba Woodsia. 



Frowfr 2 to 3 or 4 inches long, and 2 thirds of an inch to an inch and quarter 

 wide, in their outline oblong-lanceolate, acute, pinnate, somewhat villose with 



