56 Illinois State Lahoratortj of Natiirtil ITifitorij. 



1. P. epiphylla Nees. Thallus ratlier membranous, 

 sparingly divided, the divisions oblong or somewhat wedge- 

 shaped, repand-lobed; calyptra distinctly tubercnlate, exserted, 

 {Jungermania epiphylla L.) 



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

 Bib.—^yn. Hep. p. 488 ; Hep. Europ. p. 145 ; Torrey Bull. VI, 30. 

 Delin.—Bvii. 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 dichotonious, proliferous, 

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

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

 the areolae large, hexagonal; involucre ciliate-fringed or lacer- 

 ate at the mouth; calyptra smooth, included. {Jungermania 

 cahjcina Tayl.) 



Hah. — Wet limestone and slate rocks. (Eu.) 



Bih.—^yn. Hep. p. 490; Hep. Europ. p. 145; Torrey Bull. VI, 30. 



Z>e/in.— 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. 

 Geramse globose, issuing by a slender ascending tube from 

 their large flask-like receptacles which are immersed in the 

 thallus. Named for P. I). Blasius, a companion of Micheli. 



1. B. pusilla L. Thallus 1.5 — 2.5 cm. long, 4—0 mm. 

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

 the margins pinnatifid-sinuous. (Jimgetinania Blasltt Hook.) 



Hah.— ^Yet banks, Eastern V. S. (Eu.) 

 i?*.— 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. 



Exdc. — Hep. Bor.-Amer. No. 111. 



