CRYPTOGAMiA F1LICE5. Cbeilanthes. 



On rocks : Pensylvania to Virginia and on the Missouri. 



11 . July. V. V. A handsome very small fern, covered 



with long brownish hair. 

 3. C. frondibus triplicato-pinnatis, pinnulis ovalibus distinc- 



tis apice crenatis aut emargiuaris subtus dealbatis. 

 On rocks, on the banks of the Missouri. U- July. v.s. 



A very delicate small fern, very much resembling 



C. tenuifoUa. 



671 



deallata. 



735. DICKSONIA. UHerit. sert. avgl. 30. 



I. D. frondibus bipinnatis, pinnulis oblongo-lanceolatis pin- pilosiuscula. 

 natifidis, laciniis margine superiore inciso-dentatis, ra- 

 chibus pilosiusculis. IFiUd. sp. pi. 5. />. 484. 

 D, pubescens. Schkuhrjilic. p. 125. t. 131. 

 Polypodiun) pilosiusculum. Muhlh. in lilt. 

 In shady woods, among rocks: Pensylvania and Virginia. 

 II.. V. V. A foot or more high, resembling Jspidium 

 dilatatum. ' 



736. HYMENOPHYLLUM. Smith act. taur. 5. p. 418. 



1 . H. frondibus pinnatis, pinnis infimis majoribus, supe- 

 rioribus sensim rainnribus pinnatifidis, laciniis lineari- 

 bus obtusis bifidis ciliatis, venis hirtis, rachi stipiteque 

 alatis ciliatis. IFilld. sp. pi. 5. p. SIQ. 



Trichomanes ciliatum. Swartz. prodr. 136. 



In shady forests, on the trunks of old trees : Pensylva- 

 nia and Virginia. 1/. v. v. 



ciliatum. 



V. HYDROPTERIDES. 



737. ISOETES. Gen. pi. 162O. 



Willd. sp. pi. 5. 

 Fl. dan. 191. Dill. muse. 



I. frondibus subulatis semiteretibus. 

 p. 534. 



Icon. Schkuhrjilic. t. 173. 

 t. 80./. I. 



On rocks, on the bottom of rivers : New York, in the 

 Oswego river, near the Falls. 1/ . v. v. This sin- 

 gular plant, resembling a zoophyte, is about two inches 

 high. 



lacmtris. 



