CRYPTOGAM I A. I^ILICES. 251 



from Onoclea, of which there is another species in Eu- 

 rope. 



S22, ASPLEMUM. L, (Spleen-wort.) 



Sori linear, transversal, scattered. Imlusia 

 arising from the lateral veins, and opening to- 

 wards the rib. 



Species. 1. A. rhizophyllnm. 2, * pinnatifidnm. Fronds 

 lanceolate, stipitate, pinnatifid, point attenuated, rvot taking 

 root? lobes roundish ovate; sori larger, at length conflu- 

 ent. Hab. In the crevices of rocks on the bunks of the 

 Schuylkill, rare. r. v. also in Tennessee; always peifectly 

 distinct from A. rhizophylbtm to which it was apparently 

 referred by Muhlenberg, Catal. p. 97. the irotid is less 

 attenuated, pseudopinnate at the base, the bori occupying 

 nearly the w hole disk of the iobee, being also mucii lar- 

 ger and veiy prominent. 



3. angustifolium. Fertile frond separate. 4. ebeneutn. 

 Hab. From Canada ^ Florida, also in Louisiana. 5 me- 

 lanocaulon. 6, ihelypteroidss. 7 • Rnta muraria. 8. mon- 

 ianum. 



A large genus extending throughout Europe, and 

 Xorth America as far as the West Indies; there are also 

 species in New Zealand. 



8'2S. SCOLOPENDRIUM. Smitlu (llart's- 

 tongue.) 



/S^orilincar, transversal, scattered. Indusium 

 double, superficial, occupying either side of the 

 sori, opening almost tike a longitudinal fissure. 



Frond entire or multifid. 



Species. S. officinarum. v. v. In the western parts of 

 the state of New York, in the crevices of calcareous 

 rocks, beneatli the shade of the Hemlock Sj>ruce (Abies 

 canadensis, J and accompanying the Taxiis canadejisis or 

 American Yew. 



824. PTERIS, L. (Brake.) 



Sori continuous, linear, marginal. Indusium 

 from the inflected margin of the frond, opening 

 inwards. 



Species. 1. P. pedata. 2. atropurpiirea. Also indige- 

 r.ous to Louisiana, o. gracilis. 4,caudata. 5. aqidlina- 



