208 Evans: NoTES ON GENUS HERBERTA 
1. HERBERTA ADUNCA (Dicks.) S. F. Gray 
Jungermannia adunca Dicks. Plant. Crypt. Brit. 3: 12. pl, Sf. de 
1793. 
Jungermannia juniperina 8 Hook. Brit. Jung. pl. 4. 1812 (in part). 
Herberta adunca S. F. Gray, Nat. Arr. Brit. Pl. 1: 705. 1821. 
Schisma aduncum Dumort. Comm. Bot. 114. 1822. 
Jungermannia juniperina 8 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 juniperinum B Nees, Naturg. Europ. Leberm. 1: 108. 
1833. 
Sendinera juniperina B Nees; C. L. & N.Syn. Hep. 239. 1845. 
Sendtnera straminea Nees, I.c. 240. 1845. 
' Sendtnera adunca a Dicksoniana Gottsche; Rabenhorst, Hep. Eur. 
2I0 (accompanying text). 1862. 
Herberta straminea Trevis. Mem. R. Ist. Lomb. III. 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. I912. 
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 mm. 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 in the basal portion and 
20-40 X 20 in the ~ marginal cells in basal portion 
