576 CRYPTOGAMIA FILICE9 



461. ONOCLEA. L. Mitt. Gen. 820. 

 [Au ancient Greek name ; applied lo this genua.] 



Capsules covering the whole under surface of the frond. Indueia 

 formed of the segment* of thfl frond, which are contracted and revotute 

 with their margins connate, resembling berries, opening but not expand- 

 ing. 



1 O. ■ kxsibilis, /,. Sterile frond pinnate; divisions lanceolate, the 

 lower ones distinct, pinnatifid-dentate, the upper ones united at base, 

 repand-dentate, or entire ; fertile frond bipmnate, with the segment* 

 recurved and gtoboscly contracted, resembling a compound spike. 

 Beck t Bot. p. 448. 



flaHSlTIVX OXOCLEA. 



Sterile fronds 6 to 12 or 15 inches long, and 5 to 10 or 12 Inches wide at base, 

 •blon<*-triangular in their outline, pinnatcly dissected, smooth,-the lower divi- 

 sions or ptnme 3 to 6 or 7 inches Ion-, and 3 fourths of an inch to 2 inches wide, 

 oblong-lanceolate, laciniate or pinnatifid-dentate, distinct at base and sub-petio. 

 late.-the upper ones smaller, linear-oblong, and nearly entire, confluent or uni- 

 ted at base; stipe 6 to 10 or 12 inches long, slender, angular, naked. Fertile 

 fronds 4 or 5 to 8 or 10 inches long, bipinnate, the divisions 1 to 2 or 3 inches 

 lonr, nearly erect, the contracted and somewhat triangular-globose segments 

 imoothish,dark brown,-resembling berries in two-rowed unilateral spikes; sttpe 

 U lo 12 inches long, rather stout, subterete, naked and smooth. 

 Hab. Moist woodlands: frequent. Fr. July. 



Obs. One other species is enumerated in the U. States,-which, however, Frof. 

 Torrey considers as only a variety of this. 



462. ASPIDIUM. Swarlz. Mttt. Gen. 819. 

 [Greek, Aspis, a shield ; from the form of the Indusium.] 



Sort roundish, or elliptic, scattered. Indusium orbicular and urabili- 

 r ate, or reniform and opening on one side. 



■j- Frond pinnate. 



1 A acrostichoidks, WiUd. Frond pinnate ; leaflets alternate, dis- 

 tiuct,' lance-linear, acute, sub-falcate, mucronate-serrulate, aunculate at 

 base on the upper side, subsessile, the upper ones only fertile ; son fi- 

 nally confluent ; stipe and rachis chaffy. Beck, Bot. p. 448. 

 Nephrodium acrostichoides. Mx. Am. 2. p. 267. 



ACROST1CHUM-LIKE AsriDIUM. 



Fronds 9 to 15 or 18 inches long, and 2 to 4 inches wide, lance-oblong in their 

 outline, pinnate, the pinna or leaflets alternate, 1 to 2 inches long, and fourth t* 

 half an inch wide, linear-lanceolate, very acute, or cuspidate, slightly falcate, 

 obtuse at base and semi-hastate, or with a triangular auriculate mucronate pro. 

 auction on the upper side, finely serrate, and somewhat cil.ate, the "nature, 

 slenderly mucronate or awned, the upper surface smooth, somewhat pilose beneath, 

 •specially along the midrib, subsessile; rachis clothed with ^' Um ^^' 

 branaceous palistuawny scales ; stipe 2 or 3 to 5 inches long, chaffy. Sort lo • 

 •ingle, or more commonly in a double row, on the under surface of the smaller 

 leaflets at and near the summit, at first distinct, finally confluent and cowing 

 the whole surface ; indicium orbicular, umbilicate in the centre. 

 Web. Rocky woodlands: common. Fr. Jane-August. 



