48 AMERICAN FERN JOURNAL 
New Manual the range is given as ‘‘On rocks, e. N. Y. 
to Ky., ‘Mo.,’ and southw.” There is no longer reason 
to question its occurrence in Missouri, for the specimen 
from Greene County is undoubtedly this species. Pre- 
sumably it occurs here on limestone, for all the rocks 
in the vicinity are calcareous. 
[Asplenium pinnatifidum was reported from this 
county in Tracy’s Check-list of Missouri Plants,! but 
probably the report is based upon an incorrect deter- 
mination. 
9. ASPLENIUM PLATYNEURON (L.) Oakes. One of 
the most frequent and abundant ferns of the region, 
occuring in the woods nearly everywhere. It is con- 
fined to calcareous soil or rocks, preferring considerable 
moisture, but is able to grow in comparatively arid 
situations. 
10. ASPLENIUM PYcNocARPON Spreng. In Greene 
County this fern is not common, but it occurs in a few 
places in the hilly country along the James River, usually 
in low damp ravines. In Camden County, Missouri, 
east of Greene County, it is very abundant in places, 
especially in the limestone sinks so characteristic of that 
region. The writer has seen it. there densely covering 
areas of an acre or more in extent to the exclusion of 
nearly all other vegetation. 
11. ASPLENIUM RESILIENS Kunze. This is one of the 
rarest ferns of the region and the writer has found it in 
only a single locality, along the Sac a few miles northwest 
of Springfield, where it grows in deep shade in recesses 
of the northward slope of a low bank, the individuals 
being rather numerous. In the writer’s mind this plant 
is associated with mosquitoes, for these shaded banks 
are infested with swarms of them, which add little to 
the pleasure of fern collecting in this particular locality! 
Another rare plant of the immediate vicinity is Caulo- 
phyllum thalictroides. 
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