112 AMERICAN FERN JOURNAL 
all cases the soils in which the roots were imbedded 
proved to be highly calcareous, even though the ad- 
joining rocks were not. 
In view of the above results it seems obvious that in 
the study of the habitats of plants, such as these ferns, 
the mere superficial: recording of the kind of rock is 
inadequate, and may lead to erroneous conclusions. 
The nature of the soil upon the rock is the important 
factor, and this should always be examined to find out 
whether, instead of being derived from the rock, it may 
not consist essentially of decayed vegetable matter. In 
the latter case, lime-loving plants may be enabled to 
thrive even though the underlying rock is wholly non- 
calcareous. 
U. 8. Nationa, MusEum,*® WasHINnaTON, D. C. 
Cheilanthes lanosa and Isoetes in Indiana 
CHARLES C. DEAM 
The only record for Cheilanthes lanosa (Michx.) 
Watt for Indiana is contained in a list of the “Plants 
of the Lower Wabash Valley” by Dr. J. Schneck. This 
list was published by the Indiana Geological Survey ™ 
1876. The area included in the title “Lower Wabash 
Valley” is that below the confluence of White River of 
Indiana. The Indiana territory included was parts ° 
Gibson and Posey Counties. The habitat of Cheilanthes 
lanosa is given as rocky ledges. In Gibson and Posey 
Counties there are no rocky ledges, except a few ge 
sand-stone ledges on the “Gordon Hills” in Gibso? 
County, and a few low limestone ledges along the We 
bash River below New Harmony. The writer has 
searched all of these and has failed to find the is i | 
ferred to, although the pressure of forty years of OV 
Sex 4 y : 
Since this paper was written transferred to the Bureau of Chemis of 
aS ce a ee: 
3. ae 
Ss To Tage ep oe tn ea Ade Ra aah merge 
