56 Illinois State Lahoratorij of Natural History. 



1. P. epiphylla Nees. Thallus rather membranous, 

 sparingly divided, the divisions oblong or somev^^hat vv^edge- 

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

 {Jungermania epii^hylhi L.) 



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

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

 Delin.—Bni. Jung. t. 47 ; Ekart t. VII f. 52; Rulliv. 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. {Jungermania 

 calycina Tayl.) 



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



L'ib.— 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 v^^anting 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 vs^ith 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. Blasius, 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 Blasia Hook.) 



Hah.—\Nei banks, Eastern U. S. (Eu.) 

 Bih.—^yn. Hep. p. 491 ; Hep. Europ. p. 135. 



De/m.— 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. 



