108 Illinois State Lahoratonj of Natural History. 



2. S. glaucocephala Aust. Stems small, csespitose^ 

 somewhat simple, creeping or ascending, producing numerous 

 suckers; leaves entire, obtusely complicate-bilobed, the lobes 

 broadly ovate, mostly obtuse and apiculate; involucral leaves 

 uniform, some of them somewhat denticulate; inner involucre 

 small, subcuneate, strongly compressed, the mouth truncate, 

 entire, often somewhat recurved. (S. Peckii Aust., Junger- 

 mania glancocephala Tayl.) 



Hab. — On rotten wood, Canada (Maconn), N. Y. (Peck), N. Eng. 

 (Austin). 



Bib. — Syn. Hep. p. 684 (sub Jungermania) ; Pro. Phil. Acad. 1869, p. 

 218 ; Torrey Bull. VI, 85. 



Exsic — Hep. Bor.-Amer. No. 20. 



** Ventral lobes about double the size of the dorsal (except in 



upper leaves of No. 8). 



f Margins of leaves subentire. 



3. S. albicans Mitt. var. taxifolia. Stems ascending, 

 almost rootless; leaves closely complicate-bifid, subdenticulate, 

 either wholly evittate or with only a rudimentary vitta near 

 the base, the lobes obtuse or somewhat acute, the ventral ob- 

 long-acinaciform, the dorsal subovate; inner involucre ovate- 

 plicate. {Jungermania albicans L. var. taxifolia, Diylophijllum 

 taxifolium Dumort. A smaller form is J. obtusifolia Sulliv. 

 Muse. AUeghan. No. 230, not of Hook. ) 



Hab. — Under rocks in mountain ravines, the smaller form also on 

 the ground. (Eu.) 



5(6.— Syn. Hep p. 76 (sub Jnngennania) ; Hep. Europ. p. 49 (sub 

 Diplophyllum). 



Exsic— Muse. Alleghan. No. 229, 230 ; Hep. Bor.-Amer. No. 22, 23. 



4. S. compacta Dumort. var. irrigua. Stems creep- 

 ing; leaves repand, somewhat rigid, deeply unequally bilobed, 

 the lobes rounded, submucronate, the ventral appressed, the 

 dorsal half as large, convex, with incurved apex; involucral 

 leaves bifid, the lobes subequal, denticulate; inner involucre 

 ovate, subcompressed-angular, the mouth denticulate. {Juu- 

 gennania irrigua Nees, S. irrigua Dumort.) 



Hah.— In wet places, Mts. of N. Eng. {Oakes), Catskill Mts {Austin), 

 Canada [Macoun), near Tom's R., N. J. (Austin). (Eu.) 

 i?*.— Syn. Hep. p. 67 ; Hep. Europ. p. 37. 

 Exsic. — Hep. Bor.-Amer. No. 15c. 



ff Margins of leaves serrate-dentate. 



