56 Illinois State Laboratory of Natural History. 



1. P. epiphylla Nees. Thallus rather membranous, 

 sparingly divided, the divisions oblong or somewhat wedge- 

 shaped, repand-lobed ; calyptra distinctly tuberculate, exserted. 

 (Jungermania epiphylla L.) 



Hdb. On ground in springy places, ditches, etc. (Eu.) 

 Bib Syn. Hep. p. 488 ; Hep. Europ. p. 145 ; Torrey Bull. VI, 30. 

 Delin. Brit. Jung. t. 47 ; Ekart t. VII f. 52 ; Sulliv. Mosses U. S. t. 

 VII. 



Exsic. Hep. Bor.-Amer. No. 110. 



2. P. calycina Nees. Thallus dichotomous, proliferous, 

 the early divisions linear-oblong, the margins ascending, re- 

 motely sinuate ; later divisions linear-palmatifid, coarsely nerved, 

 the areolae large, hexagonal; involucre ciliate-f ringed or lacer- 

 ate at the mouth; calyptra smooth, included. (Jnnyermania 

 calycina Tayl.) 



Hal. Wet limestone and slate rocks. (Eu.) 



Bib Syn. Hep. p. 490; Hep. Europ. p. 145; Torrey Bull. VI, 30. 



Delin Brit. Jung. t. 47 f. 18. 



III. BLASIA MICH. 



Sporogonium in an oval cavity in the midrib of the thal- 

 lus. Outer involucre wanting. Inner involucre wanting or a 

 fusiform utricle vanishing early. Calyptra obovate. Capsule 

 oval-globose, bursting through the thallus near its apex. An- 

 theridia immersed in the thallus, covered with dentate scales. 

 Gemmae globose, issuing by a slender ascending tube from 

 their large flask-like receptacles which are immersed in the 

 thallus. Named for P. D. Blasins, a companion of Micheli. 



1. B. pusilla L. Thallus 1.5 2.5 cm. long, 4 6 mm. 

 wide, linear-obovate, simple or forked or stellately expanded, 

 the margins pinnatifid-sinuous. (Jungermania Blaxia Hook.) 



#-&. Wet banks, Eastern TJ. S. (Eu.) 

 Bib. Syn. Hep. p. 491 ; Hep. Europ. p. 135. 



Delin Brit. Jung. t. 82-84; Ekart t. XI f. 94, et t. XIII f. 114; Sul- 

 liv. Mosses U. S. t. VII. 



Exsic. Hep. Bor.-Amer. No. 111. 



