LorirnCOLEA. 245 



Prof. Liiidberg states in "Muse. Scand." p. 7 that Dickson's 

 original specimens ol Juu(j. ovafa PI. Crypt. Brit. Fasci, 3, p. 11, 

 t. 8, fig. 6 (1793) are identical, but evidently, from the above note 

 by Dr. Hooker, neither he nor Dickson considered them the same, 

 and as the description of Dickson is short and unsatisfactory, 

 and the figure poor, I retain Hooker's name. Dijdopliijllum 

 Dicksoni is a very distinct species, no other British one 

 approaching it. Diplop/i/jl/nm arf/enicuii/ (Tayl.), Spruce, a North 

 American species, is its nearest congener, but is distinguislied by 

 its serrate leaves, 12-plicate perianth, &c. 



Description of Plate C. — Fig. 1. Plants natural size. 

 2. Portion of stem x 16 (Dartmoor, E. M. Holmes). 3. Portion 

 of fertile stem x 16 (New Galloway, Mc Andrew). 4, 5. Upper 

 leaves x 24 (ditto). 6, 7. Leaves x 24 (Dartmoor, Holmes). 



8. Portion of leaf x 290 (New Galloway, McAndrew). 



9, 10. Bracts x 16 (ditto). 11. Perianth x 24 (Dartmoor, 

 Holmes). 12. Cross-section of perianth, upper half x 24 (ditto). 

 13. Portion of mouth of perianth x 31 (ditto). 14. Ditto x 85 

 (New Galloway, McAndrew). 15. Pistillidia x 85 (ditto) 

 16, 17. Perigonial bracts x 24 (Dartmoor, Holmes). 



Subtribe VI. EPIGONEANTHE^. 



Genus 22. LOPHOCOLEA, Diwf. 



Jungermania, Mich. Nov. pi. gen. p. H (1729); L. 8p. pi. ed. 1, 2, p. 1132 



(1753). 

 Jungermanict} sect. Lophocolea, Dum. Syll. p. 5!) (1831). 

 Lophocolea, Dum. Recueil, p. 17 (1<S35). 



Plants large, very rarely small or minute, soft and flaccid, 

 green or whitish-green, when dry usually yellowish, with an un- 

 pleasant smell, rarely fragrant, growing more or less in shallow 

 spreading layers. Stems creeping, with long whitish rootlets, 

 equally leaved, vaguely branched, rarely subpinuate, moderately 

 thick, in the more robust species about 7 cells in diameter ; cells 

 small, cortical quadrate or oblong, inner linear-prismatic. Branches 



