114 IOWA ACADEMY OF SCIENCES. 



be found upon mud-fiats, upon dripping rocks, on moist lime- 

 stones and sandstones, on the bark of trees, on old logs, in 

 tangled mats of moss, and other similar habitats. But not 

 infrequently they flourish on rocky ledges and sandy or clayey 

 tracts, which are dry and barren during the greater part of the 

 summer. Their power of re-ju venation, however, almost 

 equals that of their near kin, the mosses, and moisture almost 

 instantly revives them, — a fact of much interest to the student 

 of these forms, for dry, unsightly material collected during the 

 most unfavorable seasons of the year, may be rendered fit for 

 study in a few moments. 



The following notes on twenty -one species are offered not 

 as a complete and exhaustive report on the Hepaticce of Iowa, 

 but rather as an introduction to this, in Iowa much-neglected, 

 group, with the hope that interest -in it may be aroused, and 

 the way paved for a full account of our species and their dis- 

 tribution, — for the list will no doubt be materially increased. 



Although its nomenclature is not always strictly correct, 

 the sixth edition of Gray's Manual is followed for convenience, 

 because of its general use. 



Unless otherwise stated, the material upon which this report 

 is based, is deposited in the herbarium of the State University, 

 and was personally studied by the writer.* 



Unless special credit is given, the specimens were collected 

 by the writer, Mr. T. E. Savage assisting at Wildcat Den, 

 Muscatine county, and with Mr. P. C. Myers on Muscatine 

 Island, Louisa county. 



Order Jungermanniace^. 



Friil/(nii(i viiY/hiica Lehm. On the bark of trees, usually near 

 the base, on low grounds, Muscatine Island, Louisa county; not 

 common. 



F. ebor<(ce)isi!^ Lehm. On the bark of trees, near base, 

 in Johnson and Louisa counties, and on both bark of trees, and 

 sandstone, in Wildcat Den, Muscatine county; very common; 

 also reported from Story county by Bessey.f 



F. (eolitis Nees. On sandstone, in Wildcat Deii, Muscatine 

 county; not common. 



F. s(/uarrom Nees. Common on limestone bluffs at Iowa 

 City, and at Ft. Dodge. 



♦Prof. L M. Underwood kindly assisted in a few of tlie earli-^r determinations. 

 (Bull. la., Agric. Coll., Nov., 1884. 



