50 AMERICAN FERN JOURNAL 
19. Finrx BuLBIFERA (L.) Underw. Much less abund- 
ant than the preceding species, but not rare. It fre- 
quents moist, shaded, limestorie cliffs, and is one of the 
associates of Aspleniwm resiliens. The pendent fronds 
sometimes reach a large size and are very freely bulbi- 
ferous. 
20. Woopsta optusa (Spreng.) Torr. Rather com- 
mon on shaded cliffs, frequently associated with Filix 
fragilis. Along the James it grows on limestone, but 
about Pearl it inhabits sandy soil. 
21. ONOcLEA sENsIBILIS L. Known only from Pearl 
and Graydon Springs. In both cases it grows in sandy 
soil in thin woods, near the edge of small streams. At 
one place near Graydon the writer has seen it in a marsh 
that doubtless is underlain by limestone. 
22. OSMUNDA CINNAMOMEA L. Apparently this spe- 
cies is confined to sandy soil, and occurs only in the vi- 
cinity of Pearl and Graydon Springs. It is found in thin 
white oak woods or along sandstone cliffs. At Eudora, 
near Graydon, it is most abundant, the plants often 
reaching a large size and forming large colonies. 
23. OsMUNDA REGALIS L. So far the royal fern has 
been collected only at Graydon Springs, where it grows 
in a restricted area in sandy soil along the edge of the 
creek. Conditions at Pearl are almost exactly the same, 
but while all the other ferns partial to acid soil are 
found there, this appears to be lacking. 
24. OpHioGLossumM ENGELMANNI Prantl. Like the 
more widely dispersed 0. vulgatum elsewhere, this plant 
is very local in Greene County. Isolated colonies are 
found in several places along the Sac north and west of 
Springfield, and a few very near the city. The writer 
has found it only in thin, dry oak woods, usually on 
rather exposed grassy slopes. 
25. BoTRYCHIUM VIRGINIANUM (L.) Sw. Very com- 
mon in rather damp oak woods in nearly all parts of the 
region. 
