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Prof, Kunze on some Ferns of the United States. 83 
Species is penis related to N. nivea, though essentially distinet. 
I have only seen specimens obtained from the Berlin’ botanical 
garden, b ll’s and Pursh’s diagnoses donot permit a owt 
about the idangty of the species.” I would not hav looked. for 
it-under Cheilanthes.* 
W oopsia.—I cannot disting nish W. rufidula, Beck, (Nephro- 
dium, Mich.,) from W. eA me Br. The species varies, with 
ovate, acutish, elongated, obtuse or rounded fronds. S$ ens 
from New York, sent a! Prof. A. ee attain ane ‘pat of heed 
st species, 
_ Prysematio. —Ph. obtusum, Hook. F'l. B. Am. ii, 259. Ms oc 
name of Woodsia obtusa. This fern aol from the noth 
eastern states to Nerth Carolina, Missouri and Texas. 
"i ahi ing tt so ae seen no specimens of A. cieutariuam, 
Spreng., from the d States.—Hooker refers A. Filix mas, 
-Pursh, to A. ae H. and Grev., whether correctly or not, I 
cannot decide ; but I have seen the true A, Filix mas from New- 
foundland.—A. molle, Sw., appears to be unknown as an inhabit- 
ant of the United States; I have “ hg Sah from Louisiana, 
(Ludwig in Herb. Luce !), Alexan spoisgne a os lime- 
- stone rocks near Aspalaga, Florida (Rugel !), ar 
near Houston, ‘Texas (Lindheimer in Herb. A. pl = 
teris and A. Netieboracense, Sw., are declared by ker, 
. Am., to be “quite identical.” I cannot subscribe to this ‘opin- 
ion. . The latter species, Schk., t. 46, appears to me to be distin- 
guished from the former by a shorter stipe, by the circumference of « 
the frond being more narrowed upwards and downwards, by thin- 
ner texture, by narrower and ciliate segments of the pinne, and by 
— veins (Presl pase arranges both species in different sec- 
of his genus Lastrea). I have seen A, Noveboracense from 
Nev York (Halsey), Perse (Paxppig he a (Beyrich), 
ugel),—I seen no Nor pros an 
C of A. cristatum, Sw, Fhe identity of A, spinulo 
Sw., .A. dilatatum, Sw., A. dumetorum, W., and A, i nine 
dium; W., _ as, different forms of one species, cannot . be ‘dagiitied 
bik must be studied more closely in its native localities, as it 
may prove to be a distinct species. I have specimens gee 
ree (La Pylaie,) Greenland, and abr 
ochleana sinuata, Kaulf. Enum. Fil. 135., Kunze, A 65. Pac 
wacam hye ee veut nograiemi sintiata, ‘Piel. § 
xican a vian s sie bah i 
Texas Brawn, by 
