Hepaficw of North America. 87 



1. C ascendens Hook, and Wils. Large, pale-green; 

 stems prostrate; leaves ascending, ronndish-oblong, slightly 

 emarginate; involucral leaves 2-cle£t; inner involucres 2-3- 

 lobed, the lobes long and irregularly lacerate-toothed. (C. /((- 

 hiatus Tayl.) 



Hah. — On rotten logs, etc., rather common. 

 5i6.— Sulliv. Mosses U. S., p. 91. 

 DfZm.— Sulliv. Mosses U. S., t. VIII. 

 Exsic. — Hep. Bor.-Amer. No. 70. 



** Amphigastria hifid; inrohicral leaves 2. 



2. G. pallescens Dumort. Stems procumbent, creeping; 

 leaves flattened^ ovate-subquadrate, retuse or obtuse; amphi- 

 gastria ovate, distant, subentire, free; involucral leaves 2- 

 toothed; inner involucre deeply trifid, the laciniae spinose-den- 

 tate; calyptra conspicuous, mostly longer than the inner invo- 

 lucre. ( J ungermania pallescens Ehrh.) 



Hab— Mis. of N. Eng. (Oales). (Eu.) 

 Bib— Syn. Hep. p. 187 ; Hep. Europ. p. 101. 

 Exsic, — Hep. Bor.-Amer. No. 69. 



3. O. polyanthos Corda. Stems procumbent, creeping; 

 leaves subascending, ovate-subquadrate, truncate-subretuse; 

 amphigastria free, distant, ovate-oblong; involucral leaves 

 slightly 2-toothed; inner involucre 3-lobed, the lobes short and 

 nearly entire; calyptra longer than the inner involucre. (J un- 

 germania polyanthos L.) 



Var. rivularis Nees. Larger, more branching, succu- 

 lent; leaves mostly rounded at the apex; amphigastria often 

 divided into halves or entirely wanting, when present broader 

 and somewhat denticulate. 



Hab. — On ground and rotten logs ; common. (Eu.) The variety in 

 shady rills. (Pai.) 



-Bib.— Syn. Hep. p. 188; Hep. Europ. p. 101. 

 DeUn.—Brii. Jung. t. 62 ; Ekart, t. VI, f. 50. 

 ^.mc— Hep. Bor.-Amer. No. 67, 68. 



*** Amphigastria almost entire; involucral leaves 3-4. 



