454 HEPATIC jE. 



habit, narrow outline of frond, with ascending branches, margin 

 of stem and branches usually minutely crenulate, are characters 

 which I consider make it quite worthy of specific rank, and by 

 them it can be easily distinguished from other British species. 



Description of Plate CCI. — Figs. 1-3. Plants natural size. 

 4. Frond x 11 (C. & P. n. 63). 5, 6. Cross-section of stem x 24 

 (Ogwen Valley, W. H. P.). 7, 8. Ditto x 24 (near Penzance, 

 Mitten & Curnow). 9. Male catkin x 11 (C. & P. n. G3). 



4. Aneura latifrons Lindb. 



Jungermania multifida, Schmid. Icon. pi. 11], pp. 213-21(5, excl. synon. et 



pp. (1797), Hook. Brit. Jung. p. 11), n. 75, pp. (1816). 

 Riccardia multijida, Gr. & Benn. Nat. Arr. Br. PL p. G84, n. 1, pp. (1821). 

 Aneura jxdmata, a major, Nees, Nat. Eur. Leb. Ill, p. 459 (1838), G. L. N. Syn. 



Hep. p. 498 (1840). 

 Aneura latifrons, Lindb. Soc. F. Fl. Fenn. (1873). 

 Riccardia latifrons, Lindb. Hep. Hibern. p. 513 (1875). 



Monoicous, broadly and densely csespitose, depressed, small, 

 pale, bright or brownish-green in colour. Fronds suberect, 

 irregularly subpinnate or sub-bipinnate, transverse section plano- 

 convex, almost the whole breadth 4 or 5 ceils thick, the inner 

 ones large, hyaline, exterior smaller and chlorophyllose, one cell 

 thick at the entire margin; branches thin, plane, more or less 

 fastigiate, broadly or oblong-cuneate or sublinear, transverse 

 section linear, 3 cells thick near the middle ; radiculose, rootlets 

 few or numerous, hyaline ; stoloniferous, stolons proceeding from 

 the main stem and branches, radiculose, subterete and long, 

 sometimes bearing inflorescence ; gemmiparous, gemmae roundish, 

 composed of one or two cells at apex of the branches; texture 

 opaque when dry, somewhat pellucid when living ; cells of the 

 antical layer irregular, oblong-rhomboid, slightly or indistinctly 

 thickened. Inflorescence lateral on the stem or branches, very 

 often the $ and $ together, rarely $ alone. Perichsetial bracts few 

 but large, broadly oval, irregularly lobate, fimbriate. Pistillidia 

 3-10, short, conical. Calyptra large, ascending, pyriform, clavate 



