606 Proceedings of the Royal Irish Academy. 



(1829). Salvmiella, Hiibener, Hep. Germ. p. 30, inter Synon. 

 (1834).— Lindberg. 



1. Riccia glauca, Linn. Frond stellately bilobed, divisions linear, 



dichotomous, emarginate, fleshy, punctate, membranaceous at the 

 margin, from :^ to 1 inch long. Capsules immersed in the upper 

 side of frond, with brownish black opaque persistent styles. 



Kiccia glauca, Linn. Sp. PI. 1605; Engl. Bot, 2546; Lindenb. IMonogr. 

 Rice. p. 417, t. 19; JSiees, Eur. Leberm. 4, p. 393 ; G. L. et K 

 Synop. Hepat. p. 599 ; Taylor, in Fl. Hib. n. p. 70. 



Hab. On damp ground, where water has stood during winter ; wet 

 hedge banks, and scattered in more or less abundance over the 

 whole of Ireland. 



2. Riccia sorocarpa, Bischoff. Frond solid, somewhat trigonous, 



glaucous green on both surfaces, subdichotomous, divisions thick 

 and fleshy, margin glabrous, inflexed when dry, upper surface 

 canaliculate when dry, mid vein distinct. Fruit immersed when 

 young, at length bursting the epidermis, and allowing the spores 

 to escape. 



Eiccia sorocarpa, Bisch. in JSTov. Act. l^at. Cur., 17, p. 1053 to 71,. 

 f. 11; G. L. et JSr. Synop.' Hepat., p. 600; Rabenhor. Hep. 

 Europ. exsic. n. 28, 543 ; Dr. Braithwaite, in Grevillea, for March 

 ('1-873), p. 144; Dr. Carrington, in Grevillea, for December 

 (1873), p. 86, pi. 18; Professor Lindberg, in Hepat. in Hibern. 

 lect^, p. 471 (1874). 



Hab. Fissures of moist walls, &c. On an old wall near Dingle, Co. 

 Kerry, July (1873), Professor Lindberg. 



RicciELLA, Al. Braun. 



Eiccia, Sp. L. PJcciella, Braun, in Bot. Zeit. (1821); Lindenb. Synop. 

 Hepat. ; Dumort. Hepat. Europ. (1874). 



'' Fruit globose, protuberant from the lower surface of the fi'ond, and 

 inserted on it." — Dumort. Frond spongy, mixed with large air 

 cavities, floating. 



Ricciella fluitans, Al. Braun. Frond linear, plane, dichotomously 

 forked, radiating in a stellate manner, thickened at the apex, 

 emarginate and cavernous. Fruit protruding from the lower 

 surface of the frond. 



Biccia fluitans, Linn. Sp. PI. 1606; Nees, Eur. Leberm. 4, p. 439 

 G. L. et i!^. Synop. Hepat. p. 610 ; Lindenberg, Monogr. Pice, 

 p. 443, t. 24-25; Eabenh. Hepat. Europ. exsic. n. 82, 296, 340 

 Engl. Bot. t. 251 ; Hooker et Taylor, Muscol. Brit. ed. 2, p. 213 

 SuUivant's Musci et Hepat. U.S. p. 684, tab. 6. Eicciella fluitans 

 Lindenb. Synop. Hepat. p. 115; Hiibener, Hepat. Germ. p. 31 

 Dumort. Hepat. Europ. p. 171. 



Hab. Stagnant pools and still places by river sides ; generally floating- 



