112 lUitiols State L((t)()n(tonj (>f Xatiirat flisfori/. 



2. P, undata Sulliv. Like No. 1 but more rigid, with 

 simple branches; leaves horizontal, triangular-ovate, obtuse, 

 emarginate, or sparingly dentate at the apex, the dorsal mar- 

 gins reflexed and entire, the ventral repand-undulate; araphi- 

 gastria 2-clef t, the segments dentate. 



ifat.— Shaded banks of rivers and wet rocks, Ga. {Suldrant, Les- 

 quereux). 



Bib.— Syn. Hep. p. 659; Amer. Jour. Sci. and Arts, 1846, p. 73. 

 JEmc— Muse. Alleghan. No. 222 ; Hep. Bor.-Amer. No. 10. 



** Under side of stems ivithout crestlil-e lines, 

 f Aniphigastria 2-3-deft,fH(juri()as. 



3. P. porelloides Lindenb. Stems divided, the branches 

 ascending; leaves somewhat imbricate, convex-gibbous, obovate- 

 rotund, those near the summit of the stem repand-denticulate, 

 the others entire, the dorsal margin reflexed; inner involucre 

 terminal, oblong-ovate, the mouth compressed, denticulate. 

 (Jiinqennania viticidosa Schwein.) A variety is F. nodosa, 

 Tayl.' 



//a6.— Among mosses in swamps and rivers ; common. The var. in 

 mountain ravines, Canada, N. Eng , N. J. {Austin). 

 Bib.— Syn. Hep. p. 4S, 645. 

 Exm.—MuHC. Alleghan. No. 220 ; Hep. Bor.-Amer. No. 7, 7b. 



4. P. interrupta Dumort. Stems prostrate, copiously 

 rooting, branched, the branches horizontal; leaves imbricate, 

 oval, horizontal, entire or slightly repand; amphigastria lance- 

 olate, 2-3-cleft; inner involucre terminal, broadly obconic, the 

 mouth compressed, repand-crenulate. (P. macrostoma Sulliv., 

 Jimf/eniiaiiia interrupta Nees.) 



Hab. — On moist banks and decayed logs; O. [SulUvant), N. Eng. 

 (Oate), Greenland {Vahl). (Eu.) 



Bib.— Syn. Hep. p. 48, 659; Hep. Europ. p. 44; Sulliv. Mosses U. S. 

 p. 96 ; Torrey Bull. VI, 85. 



Delin.-inWiv. Mosses U. S. t. VIII. 



Exsic.-Mxxsc. Alleghan No. 221 ; Hep. Bor.-Amer. No. 6. 



ff AnipJiif/astria iratdinf/. 



