crypto gam i a filices. Cbeilanthes. 
On rocks : Pensylvania to Virginia and on the Missouri. 
7/ . July. v. v. A handsome very small fern, covered 
with long brownish hair. 
2. C. frondibus tripi icato-pinnatis, pinnulis ovalibus distinc- 
tis apice crenatis aut emarginatis subtus dealbatis. 
On rocks, on the banks of the Missouri. If .. July. v.s. 
A very delicate small fern, very much resembling 
C. tenuifolia. 
735. DICK SONIA. L'Herit. sert. 'angi. 30. 
1 . D. frondibus bipinnatis, pinnulis oblongo-lanceolatis pin- 
natifidis, laciniis margine superiore inciso-dentatis, ra- 
chibus pilosiusculis. Willd. sp. pi. 5. p. 484. 
D. pubescens. Schkuhr jilic. p. 125. t. 131. 
Polypodium, pilosiusculum. Muhlb. in lilt. 
In shady woods, among rocks : Pensylvania and Virginia. 
7/ . v. v. A foot or more high, resembling Aspidium 
dilatatum. 
736 . HYMENOFHYLLUM. Smith act. taur. 5. p. 418. 
1. H. frondibus pinnatis, pinnis infimis majoribus, supe- 
rioribus sensim minoribus pinnatifidis, laciniis lineari- 
bus obtusis bifidis ciliatis, venis hirtis, rachi stipiteque 
alatis ciliatis. Willd. sp. pl. 5.p. 5\ Q. 
Trichomanes ciliatum. Swartz, prodr . 130. 
In shady forests, on the trunks of old trees : Pensylva- 
nia and Virginia. 7/ . v.v. 
V. HYDROPTE RIDES. 
737. ISOETES. Gen. pl. 1020. 
1 . 1. frondibus subulatis semiteretibus. JVilld. sp. pl. 5. 
p. 534. 
Icon. Schkuhr Jilic. t. 1 73- FI. dan. 191. Dill, imisc. 
t. 80./. 1. 
On rocks, on the bottom of rivers : New York, in the 
Oswego river, near the Falls. 7/ . v. v. This sin- 
gular plant, resembling a zoophyte, is about two inches 
high. 
67 1 
dealbata , 
pilosiuscula. 
ciliatum. 
lacustris . 
