208 Evans: Notes on genus Herberta 



I. Herberta adunca (Dicks.) S. F. Gray 

 Jungermannia adunca Dicks. Plant. Crypt. Brit. 3: 12. pi. 8,f. 8. 



1793- 

 Jimgermannia juniperina j3 Hook. Brit. Jung. pi. 4. 1812 (in part). 

 Herberta adunca S. F. Gray, Nat. Arr. Brit. PI. i: 705. 1821. 

 Schisma aduncum Dumort. Comm. Bot. 114. 1822. 

 Jungermannia juniperina jS adunca Lindenb. Nova Acta Acad. 



Leop.-Carol. 14 (suppl.): 35. 1829 (in part). 

 Schisma stramineum Dumort. Syll. Jung. 76. 1831; Bull. Soc. 



Bot. Belgique 13: 125. 1874 (in part). 

 Schisma juniperiniim (3 Nees, Naturg. Europ. Leberm. i : 108. 



1833. 

 Sendtnera juniperina /S Nees; G. L. & N. Syn. Hep. 239. 1845. 



Sendtfiera straminea Nees, I.e. 240. 1845. 



Sendtnera adunca a Dicksoniana Gottsche; Rabenhorst, Hep. Eur, 



270 (accompanying text). 1862. 

 Herberta straminea Trevis. Mem. R. 1st. Lomb. HI. 4: 396. 



1877 (in part). 

 Herberta adunca var. straminea Cooke, Handb. Brit. Hepat. 70. 



1894. 

 Herberta adunca var. alpina Macvicar, Student's Handb. Brit. 



Hepat. 340. 1912. 

 Herberta adunca a Dicksoniana Schiffn. Lotos 60: 53. 1912. 



Yellowish or brownish green, often tinged with red or purple, 

 sometimes slightly glossy, growing in more or less extensive mats, 

 or scattered among other bryophytes: secondary stems erect or 

 ascending, sparingly and irregularly branched, rigid, mostly 5-10 

 cm. long but sometimes shorter, about 0.25 mm. (or fourteen cells) 

 wide and 0.18 mm. (or ten cells) thick, the cells everywhere with 

 strongly thickened walls: leaves imbricated, more or less secund, 

 unsymmetrical, ovate, mostly 1.2-1.4 long and 0.45-0.6 mm. wide, 

 bifid about one half, the divisions (in explanate leaves) slightly or 

 not at all curved, acute to acuminate, mostly 0.6-0.7 ^nrn. long 

 and 0.27-0.35 mm. wide at base, margin normally entire; vitta 

 usually indistinct even in the basal region, extending for a short 

 distance into the division but coming to an end considerably below 

 the apex, undivided portion usually 0.2-0.3 mm. long and wide; 

 cells of vitta mostly 35-60 X 22 n in the basal portion and 

 20-40 X 20 At in the divisions, marginal cells in basal portion 



