648 Proceedings of the Royal Irish Academy. 



5. Jungermannia {A.) sphcerocarpa (Hook.), Dumort. Stem simple^ 



ascending. Leaves rather distant, accumbent, orbicular, entire. 

 Colesule terminal, obovate, contracted at the mouth, and cut 

 into four large teeth. 

 Jungermannia sphserocarpa, Hook. Brit. Junger. t. 74 ; Lindenb. 

 Synop. Hepat. p. 68; Fl. Dan. t. 1773; G. L. et N. Synop. 

 Hepat. Europ. p. 93 ; Tayl. Fl. Hib. 2, p. 58. Aplozia sphaero- 

 carpa, Dumort. Hepat. Europ. p. 61. 



Hah. On stones by the sides of rivulets. JSTear Dublin, and at Tore 

 Waterfall, Killarney, Dr. Taylor. Kelly's glen, DubKn; Lough 

 Bray, Wicklow ; wet rocks, Glenad, Co. Leitrim. 



6. Jungermannia {A.) riparia (Taylor), Dumort. Stems procumbent,. 



slightly branched. Leaves obovate, obtuse, closely set on the- 

 stem, and subamplexicaul, concave, entire. Colesule terminal,, 

 obovate, apex plicate. 

 Jungermannia. riparia, Taylor, in Trans. Bot. Soc. Edin. p. 43 ; G. L. 

 et IS". Synop. Hepat. p. 97 ; Cogn. Hepat. Belg. p. 28 ; Cooke's 

 Brit. Jung. p. 9, fig. 69. Aplozia riparia, Dumort. Hepat. Europ. 

 p. 63. 



Hab. Sides of streams and pools. Kerry, Dr. Taylor. Benbulben 

 Sligo ; Brandon, Kerry ; Loughbray, and near Woodenbridge, 

 "NVicklow. Tore Cascade, Dr. Carrington. Enniscona, Cork, 

 Isaac Carroll, Esq. Dr. Taylor remarks that this plant has been 

 frequently mistaken for J. pumila. "When strong it is more 

 likely to be overlooked at first sight for Chiloscyphus polyan- 

 thos. 



7. Jungermannia (A.) nana, ISiees. Stems ascending or erect, pale green,. 



radiculose, branches slender. Leaves round or roundish-ovate, 

 erect, clasping. Colesule obtuse, at length quadrangular and 

 slightly crested, mouth toothed. 

 Jungermannia nana, JS'ees, Hep. Europ. 1, pp. 317, 278; 2, p. 

 466 ; 3, p. 533 ; 4, p. 41 ; Gottsche, Ic. Hep. ined. Jungerman- 

 nia pumila, Lindenb. Hep. Europ. p. 69, n. 68, t. 2 (excl. 

 synon.) ; De Notar., Prim. Hep. Ital. p. 38, n. 48 ; G. L. et N. 

 Synop. Hepat. Europ. p. 91 ; Carring. Irish Hepat., Trans. Bot. 

 Soc. Edinb. vol. 7, p. 3, p. 448. Jungermannia lurida, Dumort. 

 Hepat. Europ. p. 60 (1874). Yar. a major, Jungermannia 

 lurida, Dumort. Syll. p. 50, n. 49 (1831). 



Hab. On wet banks, by the sides of streams. GlengarifF, Co. Cork, 

 Miss Hutchins. Kelly's glen, Co. Dublin, and near the Seven 

 Churches, Co. Wicklow. Apparently rare in Ireland. This 

 little plant is in every way nearly allied to Jungermannia crenu- 

 lata and J. gracillima. The trigonal colesule, partly crested in 

 these plants, accords with the character of Lindberg's section a, 

 Eucalyx, in his genus Nardia (emend.). I, however, consider them 

 more naturally placed where Dumortier has placed them — in his- 

 section Aplozia, with J. sphserocarpa, J. pumila, &c. 



