350 EVANS [ 2 96] 



11. Nardia scalaris (Schrad.) S. F. Gray. 

 Juneau (B. & C. 6940). 



Although this species is rather common in Europe, it has been very 

 rarely collected in America. In addition to the station mentioned 

 above, it was found at Yes Bay, Alaska, by Howell, in 1895, and was 

 also collected by Professor Farlow on Campobello Island, New Bruns- 

 wick, close to the Maine boundary, in 1898. It was first 1'ecorded as 

 American by Pearson, on the strength of specimens collected by J. 

 Macoun on Vancouver Island. 



On account of its strongly concave and closely imbricated leaves, 

 Nardia scalaris bears some resemblance to large forms of N. crenu- 

 lata, except that it grows in more compact tufts and is likely to be 

 greener. Even without its characteristic fructification, the species is 

 readily recognized by its lanceolate underleaves, which are persistent 

 and much more conspicuous than in any of our other hepatics with 

 undivided leaves. The large and glistening 'fat-bodies' are also a 

 striking feature in many cases; they are oval in form, though some- 

 times with an irregular contour, and 2 or 3 of them are usually pres- 

 ent in each cell. The trigones of the cells are always distinct but are 

 sometimes small. The species has been well represented by Hooker, 1 

 and the cell-structure is figured by Gottsche. 2 



12. Nardia haematosticta (Nees) Lindb. Muse, scand. 8. 1879. 



Jungermannia scalaris fi minor NEES, Naturg. der europ. Leberm. i : 281. 



1833- 



Jungermannia hamatosticta NEES, 1. c. 2 : 453. 1836. 

 Alicularia geoscypha DE NOT. Mem. Ace. Tor. II. 18: 486. 1859. 

 Alicularia scalaris j3 minor NEES ; G. L. & N. Syn. Hep. n. 1844. 

 Nardia geoscypha LINDB.; Carr. Brit. Hep. 27. 1874. 



Alicularia ;z'0rLiMPR. ; Cohn, Kryptogamenfl. von Schlesien. 251. 1877. 

 Nardia minor ARNELL, Lebermosstudien imnordl. Norwegen, 39. 1892. 



Paroicous : densely and intricately caespitose, green, sometimes 

 tinged with reddish ; stems prostrate, ascending at the tips, attached 

 by a thick felt of whitish rhizoids: leaves on slender and sterile 

 branches distant, on robust and fertile axes imbricated, obliquely in- 

 serted or, sometimes, almost transverse, broadly orbicular, rounded or 

 broadly emarginate at the apex, entire or slightly sinuate : cell-walls 

 rather thin, with small but very distinct trigones, cuticle smooth or ver- 

 ruculose : underleaves lanceolate, minute, fugacious except in the in- 

 florescence : 9 inflorescence borne on a principal branch ; stem-apex 

 hollowed out into a rudimentary, radiculose sac, extending downward at 

 right angles to axis; bracts in 3 or 4 pairs, gradually increasing in size 



Jung.//. 6f. 1816. 

 2 Gottsche & Rabenhorst, Hep. eur. exsic. no. 223. 



