cRYPTOGAMiA FiLiCEs. Cheilanthcs. 67l 



On rocks : Pensylvania to Virginia and on the Missouri. 



1/ . July. V V. A handsome very ^mail fern, covered 



with long brownish hair. 

 2. C. frondibus triplicato-pinnatis, pinnulis ovalibus distinc- deallata. 



tis apice crenatis aut emarginatis subius dealbatis. 

 On rucks, on the banks of the Missouri. ?i . July, v.s. 



A very delicate small fern, very much resembling 



C. tem/ifolia. 



735. DICKSONIA. LHerit. serf. angl. 30. 



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

 natitidis, laciniis margine superiore inciso-dentatis, ra- 

 chibns pilosiusculis. Willd. sp. pi. 5. p. 484. 

 D. pubescens. Schhuhrjilic. p. 125. /.131. 

 Polypodiuni pilosiusculum. Muhlh. hi lilt. 

 In shady woods, among rocks : Pensylvania and Virginia. 

 2/ . V. V. A foot or more high, resembling Aspidium 

 dilatatum. 



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



1. H. frondibus pinna'is, pinnis infimis majoribus, supe- 

 rioribus sen-^im minoribus pinnatitidis, laciniis lineari- 

 bus obtusis bifidis ciliatis, venis hirtis, rachi stipiteque 

 alatis ciliatis. IFil/d. sp. pi. 5. p. 5]g. 



Trichomanes ciliatum. Swarfz. prodr. ]36. 



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

 nia and Virginia. 1/ . v. v. 



ciliatum. 



V. HYDROPTE RIDES. 



737. ISOETES. Gen. pi. 162O. 

 1 . 1, frondibus subulatis semiteretibus. Willd. sp. pi. 5. 



Fl. dan. 191. DHL muse. 



t. 173. 



p. 534. 



Icon. Schkuhrjilic. 

 t. 80./. 1. 



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

 Oswego river, near the Falls. 11. v. v. This sin- 

 gular plant, resembling a zoophyte, is about two inches 

 high. 



lacuslris. 



