196 HEFATICjE. 



sidered by Dr. Spruce as a variety of P. albescens (Hook.), but as 

 it grows under similar conditions and at tbe same altitude, 

 retaining the distinctive characters above mentioned, I look upon 

 it as a distinct species. 



Description of Plate LXXVI. — -Fig. 1. Plants natural size. 



2. Portion of stem, antical view x 31 (Loch-na-gar, J. Sim). 



3. Ditto, postical view x 64 (ditto). 4-6. Leaves x 64 (ditto). 

 7, 8. Ditto X 85 (Lapland, y\ngstrom). 9. Portion of leaf x 290 

 (Loch-na-gar, J. Sim). 10, 11. Stipules x 85 (Lapland, 

 Anijstrom). 12-15. Ditto x 64 (Loch-na-gar, J. Sim). 

 16-18. Sub-bracts x 31 (Lapland, Angstrom). 19, 20. Bracts x 

 31 (ditto). 21. Bracteole x 31 (ditto). 22. Perianth x 24 

 (ditto). 23. Cross-section of perianth, near the base x 24 (ditto). 

 24. Ditto, upper half of perianth x 24 (ditto). 25. Portion of 

 mouth of perianth x 85 (ditto). 



Genus 17. HYGROBIELLA, Spruce. 



Jungermania, Hook. Brit. Jung. (1816). 

 Gi/mnocolea, Dum. Kecueil (1835). 

 Gephalozia, Lindb. Muse. Scand. (1879). 

 Hygrohiella, Spruce, On Gephalozia (1882). 



Plants small, csespitose. Stems somewhat thick but fragile, 

 transverse sections about 6 cells in diameter, cortical cells about 

 14, at the base rhizomatous and flagelliferous ; rootlets very few 

 or absent ; above sparingly branched ; branches lateral and axillary. 

 Subfloral innovations lateral or postical, often repeatedly innovant 

 and floriferous. Lower leaves minute, distant, upper larger and 

 closer, all transverse, complicato-bilobed, lobes equal or antical 

 slightly smaller ; cells large and elongate. Stipules smaller than 

 the leaves, somewhat similar or rarely entire. Inflorescence 

 dioicous. $ terminal on stem or branch. Bracts few pairs, 

 tristichous. Perianth large, subcarnose, fusiform, distinctly 

 obtusely trigonous, mouth small, subentire. Calyptra narrow 

 above. Capsule oblong, bistratose. Elaters bispiral. Spores 



