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IOWA ACADEMY OP SCIIONCE 
moisture. With it grew a few slender sedges, grasses and rushes, and nearby 
were species of Cladonia. It has not been seen for two years. Nearly mature 
sporophytes were collected in March, 1907, and 1908. 
One and one-half miles west of Grinnell there is a small stream on the north 
side of the Rock Island Railroad tracks. The banks are three or four feet high, 
nearly vertical, and largely composed of naked loess. The south bank is always 
shaded, and quite moist. Here Marchantia polymorpha is usually found in 
autumn, but without gametophores. Occassionally Notothylas melanospora has 
been found on this same bank, beside the water’s edge. 
Anthoceros laevis has been collected only at the foot of moist banks on the 
west side of Sugar Creek, in Jasper county, three miles west of town. Here it 
is always found in autumn. Sometimes it is quite plentiful and covered with 
sporophytes. 
In this same region we find on a few stumps and tree trunks a species of 
Frullania, probably P. virginica. It occurs in large mats. A similar Pr.ullania 
was also collected on trees along Skunk River at Moore’s Station, twelve miles 
south of Grinnell. 
Ricciocarpus natans abounds in many lagoons or ox-bow ponds along Skunk 
River, three miles southwest of Turner Station. On an outcrop of Redrock 
Sandstone north of the last place there is a considerable bed of Asterella hemi- 
sphaerica. This liverwort has been found also on clayey banks of glacial drift 
along Skunk River in the same general region. 
Thus there are within four miles of Grinnell five Hepaticae: 
1. Aneura pinguis Dumort. 
2. Marchantia polymorpha L. 
3. Notothylas melanospora Sulliv. 
4. Anthoceros laevis L. 
5. Prullania virginica Lehm. 
To this may be added as available to the local botanist: 
1. Astrella hemisphaerica Beauv. 
2. Ricciocarpus natans L. 
For some reason Aneura, Notothylas and Ricciocarpus are omitted from 
Greene’s Plants of Iowa. The last named, at least, is a well-known inhabitant 
of our State. 
