130 Hepaticae in Northern Alaska. [zoe 



Dr. Howe 3 has recently reported this species from California, 

 and the Alaska specimens, although very fragmentary, agree 

 closely with plants which he quotes (Hep. Amer. No. 26). They 

 agree also with specimens from Sweden collected by Dr. Arnell. 



Jmigermanniaceae . 



5. Marsupbt.i.a emarginata (Ehrh.) Dumort. Uualaska 

 (1024). 



6. Nardia haematosticta (Nees) Lhidb. Unalaska (1018); 

 Cape Nome (2502). 



7. Jungermannia caespiticia Lindenb. Syn. Hep. Eur. 67, 

 pi. /, /. 1-8. 1829. Aplozia caespiticia Dumort. Hep. Eur. 61. 1874. 

 Cape Nome (2501). New to America. 



Dioicous: pale yellowish-green, caespitose, $ and O plants 

 mixed in the same tuft, stems closely prostrate with numerous 

 whitish rhizoids, ascending at the tips, mostly simple but often 

 innovating below the perianth and occasionally bearing a lateral 

 branch: leaves imbricated, concave, obliquely inserted, broadly 

 orbicular, rounded or slightly emarginate at the apex, slightly 

 decurrent at antical base, margins entire or subcrenulate from 

 projecting cells: leaf-cells with very thin walls, scarcely or not at 

 all thickened at the angles; walls of marginal cells sometimes 

 uniformly thickened along free edge of leaf; cuticle smooth 

 underleaves wanting: leaves of <j> ste nis passing gradually into 

 the bracts; innermost bracts similar to the leaves but broader and 

 irregularly sinuate on the margins; bracteoles 1 or 2 in number 

 or wanting, ovate to ligulate, entire; perianth obovate and 

 gradually narrowed to a contracted, minutely crenulate mouth, 

 obtusely 4 to 5 keeled in upper part, 1 cell thick except in basal 

 fourth; archegonia about 6: g bracts mostly in 2 to 5 pairs, 

 similar to the leaves but a little smaller and more concave, some- 

 times bearing a small bluntly pointed tooth near the antical base; 

 antheridia borne singly or in pairs on short stalks; capsule 

 spherical, purple, borne on a short stalk and tearing the perianth 

 irregularly upon emerging; spores minutely verruculose, brown- 

 ish-red: elaters bispiral, bluntly pointed. 



Stems 0.35 mm. in diameter, robust leaves 0.6X0.8 mm., leaf- 

 cells at edge of leaf 32 /* in diameter, in the middle 35V and 



3 Mem. Torr. Bot. Club, 7:72. 1899. 



