70 HEPATICjE. 



larger, plane postical lobe, which is not turgid at the base ; from 

 B. Carringtoni, Jack, by its greenish sordid brown colour, presence 

 of gemmse, coarser texture, and relatively larger postical lobe. 



After the examination of numerous specimens of Radula 

 commutata, Gr., I have been unable to find sufficient characters to 

 separate it from R. Lindhergii, G. 



This species was named by Dr. Grottsche after the late Prof. 

 S. O. Lindberg, of Helsingfors, one of the most distinguished 

 botanists of our time, and whose contributions to the knowledge 

 of the Hepaticse, especially of European species, have been 

 numerous, original, and marked by an accuracy of observation 

 which commands both our respect and admiration. 



B}^ an error it was first published in Hartmann's " Handbok 

 i Scand. Flora" as Radula Lindawbergiana ; as Lindberg was the 

 discoverer of the species, I have further altered the name from 

 Lindhergiana to Lindhergii. 



Description of Plate XXII. — Pig. 1. Plant natural size. 

 2. Portion of stem, antical view x 16 (Clogwyn-du-Arddu, 

 W. H. P.). 3. Ditto, postical view x 16 (Braemar, A. Croall). 4. 

 Ditto X 24 (Hunneberg, Sweden, S. 0. Lindberg). 5. Portion 

 of leaf X 290 (ditto). 6. Perianth with bracts x 16 (ditto). 



3. Radula germana, Jack. 



Radula complanata (L.), var. plumulosa, Nees & var. tenuis, Nees, Nat. Eur. Leb. 



iii. p. 148 (1838), G.L.N. Syn. Hep. p. 257 (1844). 

 Eadula gerinana, Jack, "Flora," n. 23 & 25, pp. 355, 395-7 (1881). 



Dioicous, csespitose, small, pale yellowish or bright pea-green 

 in colour, young terminal branches darker green, the lower parts 

 and older stems being of a pale sordid brown colour. Stems 

 procumbent or erect when growing with mosses, imbricate, 

 frontally compressed, narrow, graceful, flexuose ; female plant 

 subpinnate, furcate or dichotomous, barren stems almost simple, 

 with few and very short branches, which are longer near the 

 apex ; radiculose, rootlets few, arising from the underside of the 

 lobule, fasciculate, short, sordid wdiite. Leaves imbricate, below 

 approximate, alternate, une(jually bilobed, antical lobe roundish- 



