HYGROBIELLA . 199 



seg. "25 mm., 15 mm., G mm. x "5 mm., sei^. 2 mm., 15 mm., 

 •65 mm. x "6 mm., seg-. "3 mm., "25 mm., '4 mm. x 'S mm., seg. 

 •15 mm. ; perigonial bracteole "4 mm. x 25 mm., \'3 mm. x 25 mm.; 

 antheridia 225 mm. x '15 mm. 



Hab. — Growing on wet rocks by the margin of streams or in 

 moist situations in hilly or subalpine districts. 



Somewhat rare. 7. Llanberis, Carnarvon, JF. Wilson, IF. H. P. 

 Cwm Idwal, Carnarvon, W. H. P. Glyder Vawr, Carnarvon, 

 TF. 11. P. 10. Goathland Beck, Eskdale, Yorks, Dr. Spruce, 

 M. B. Slater. High Force, Teesdale, Dr. Spruce, M. B. Slater, 

 G. Baker. 12. Langdale, Westmorland, G. Stabler. Borrowdale, 

 Cumberland, TF. H. P. 15. Head of Loch Avon, A. Croall. 

 Clockmaben, near Banchory, Aberdeenshire, T. Sin/. Ben Venue, 

 Dr. Carringtoii. Dalmally, E. George. 16. Glen Finnan, Lr. 

 Carrington. Moidart, West Inverness, S. M. Macvicar. I. Kerry, 

 Dr. Taijlor, Dr. Spruce, Dr. Carrington, and others. 



Found on the Continent (Norway, Sweden and North 

 Germany), and in Greenland. 



Obs. — "In specimens from Brandon Mt. (Ireland) and from 

 Teesdale, Eskdale, &c., the branches mostly originate from the 

 leafless lower portion of the stem, and (as there are no radicles to 

 indicate the underside of the stem) it is difficult to ascertain on 

 what face of the stem they are fixed ; but wliere they do spring 

 from a leafy part of it they are lateral, and axillary to the side- 

 leaves. Scotch specimens are more leafy, and the branches are 

 very distinctly lateral. Subfloral innovations are either lateral or 

 postical, and are often repeatedly innovant and floriferous ; as in 

 Hggrobiella myriocarpar Dr. Spruce. 



A very distinct species, at once separated from any other 

 known British species by the almost equal tristichous leaves (the 

 third postical-stipule) with elongate cells. Not long before he 

 died Dr. Spruce wrote : " Ruminating instead of working, I have 

 turned over some ancient guesses of mine on the classification of 

 Hepatictie. What think you," for a change, "of Isotaclii.s laxifolia 

 (Hook.), Hggrobiella (Spruce), pro parte ^ There are the tristi- 

 chous, nearly transversely inserted leaves ; the elongated cells 



