388 



Gametophyte a slender creeping stem with pale leaves which 

 are incurved in drying so as to cause the stems to resemble a 

 chain; leaves subimbricate, slightly concave, oval-rotund, cleft 

 one-half their length with a somewhat obtuse sinus and acute, 

 more or less spreading divisions; leaf-cells 22-2$ jx in diameter: 

 dioicous; perianth on a short branch, 1.3 mm. long, linear-fusi- 

 form, widest below the middle, the mouth ciliolate; antheridia 

 in he axils of the leaves of a short apical spike. Sporophyte a 

 reddish oval-cylindric capsule borne on a short seta. 



Somewhat common on the ground and on rotten wood from 

 Newfoundland to British Columbia and probably southward, 

 where it is often confused with the next species; also European. 

 It was distributed by Austin in Hep. Bor. Am. 56. 



5. Cephalozia Virginiana Spruce, On Cephalozia, 37. 1882. 



Gametophyte a slender creeping whitish stem; leaves con- 

 tiguous or slightly imbricate, obliquely ovate, cleft about to the 

 middle, with acute or acuminate spreading divisions; leaf-cells 

 isodiametric, about 22 jj. in diameter : dioicous or sometimes auto- 

 icous; perianth large, linear-clavate, widest above the middle, the 

 mouth constricted and unequally short-setulose; antheridia in the 

 axils of the leaves of a short spike. Sporophyte an oval-cylindric 

 reddish brown capsule on a rather long seta. 



Through the kindness of Mr. Pearson I have a fragment of the 

 type specimen described by Spruce from Portsmouth, Virginia. 

 The species appears to be more or less widely distributed through 

 the Southern States, but in the absence of mature perianths is dis- 

 tinguished with difficulty from the preceding species. It was dis- 

 tributed in Hep. Amer. 72. 



6. Cephalozia biscuspidata (L.) Dumort. Recueil d'Obs. sur les 



Jung. 18. 1835. 



Jungeruiannia bicuspidata L. Sp. PI, 1132. 1753- 



Jungermannia Lauimcrsiana Hiiben. Hepaticol. Germ. 165, 



1834. 



Gametophyte a slender prostrate greenish leafy stem, I-3 cm, 

 long, flagelliferous branching ; leaves distant in the basal portion, 

 imbricate toward the apex, round-ovate, cleft to the middle or be- 

 yond, with spreading lanceolate, acute or acuminate lobes; leaf 

 cells uniform, 30-40 // in diameter: monoicous or in one form 

 dioicous ; perianth on a very short branch, about four times the 

 length of the leaves, somewhat fusiform. Sporophyte cylindric- 

 oblong on a short seta ; calyptra thin ; spores purple. 



