FERNS OF GREENE Co., Missouri 49 
12. AspLENIUM TRICHOMANES L. According to notes 
by Mr. Blankinship this is found in a few places along 
the James River. The writer has never found it and has 
seen no specimens. It may be that the material so 
identified is really A. resiliens. 
13. AtHyrium Frurx-rormina (L.) Roth. The lady 
fern has been collected only at Pearl, probably in sand- 
stone soil. Specimens in the Drury College herbarium 
at Springfield were gathered here by Mr. Blankinship 
in July, 1889. 
14. Camprosorus rRu#IzopHyLLUS (L.) Link. The 
walking fern is rather local, but often occurs in consider- 
able abundance. It is confined to limestone boulders 
or cliffs, invariably in moist shaded situations. 
15. Pouysticnum acrosticHorpEs (Michx.) Schott. 
Widely distributed and often abundant in damp shaded 
places. It is found in both calcareous and sandy soil. 
16. DRYoOPTERIS HEXAGONOPTERA (Michx.) C. Chr. 
Rather abundant locally. It occurs in many places 
along the James in damp woods, and the writer has col- 
lected it near Strafford, where it grew on a rather dry, 
steep, stony hillside in thin oak woods. 
17. DRYoPTERIS MARGINALIS (L.) A. Gray. This has 
been found in only two localities, at Pearl and at Graydon 
Springs. It is rare at Pearl, where only a few plants 
were seen, these on limestone cliffs along a creek. At 
Graydon Springs it is more plentiful, growing on shaded 
limestone cliffs. 
18. Frurx rraciuts (L.) Underw. This ubiquitous plant 
is the commonest fern in this region, as it is in many other 
parts of the United States. It is seen oftenest on lime- 
stone cliffs, but it will grow almost anywhere in damp 
woods. The writer has seen it growing luxuriantly 
under plank sidewalks in Springfield. It often persists 
for a long time after timber has been cleared away, in 
open fields. 
