Moore — On Irish Sejmticoe. 659 



Cesia, Bennett, Gray. 



Jungcrmannia, LigMfoot, Fl. Scot. 2, p. 786 (1770); Hook. Brit. 



Junger. (1816). Cesia, B. Gray, in Gray's Nat. Arr. Brit. PL, l,p. 



705 (1821); Carruth. in Seem. Journ. Bot. 3, p. 300 (1865). 



ScMsma, Dumort. Comm. Bot. p. 114 (1823). Gymnomitrium, 



Corda, in Opiz, Beitr. 1, p. 651 (1829) ; Nees, JSTat. Eur. Leberm. 



1, p. 113 (1833). Sect. 1, Jnlacea, G. L. et N. Synop. Hep. p. 2 



(1844). Acolea, Dumort. Syll. Jung. Eur. p. 76 (1831), et Ke- 



cueil, 1, p. 23 (1835). 

 Involucral leaves several. Colesule wanting. Bases of the pistillidia 



immersed in the hollow apex of the stem. Antheridia axillary. 



Amphigastria none. 

 Cesia crenulata (Gottsche), Carruth. Stems erect or depressed, 



of a dirty white or brownish colour. Leaves closely imbricated, 



broadly ovate, bidentate at the apex, crenulate at the margins. 

 Carrington, Ii'ish Crypt, in Transactions Bot. Soc. Edinb., vol. 7, 



p. 3, tab. 1, fig. 5 (1863); Gottsche et Rabenhor. Hep. Europ. 



exsic. n. 478. Jungermannia concinnata, Taylor, in El. Hib. 2, 



p. 59. 



Hab. Frequent on the higher mountains in Ireland, and in some few 

 instances descending to sea level. Dr. Carrington refers all the 

 Irish localities for Jung, concinnata to this plant ; he considers 

 the true Gymnom. concinnatum, Corda, has not yet been observed 

 in Ireland. After due examination of my own specimens, and 

 some others collected in Ireland, I feel bound to corroborate Dr. 

 Carrington ; they are all referrible to G. crenulatum, Gottsche. 



Sub-tribe 7. Acrobolbe^. 



ACEOBOLBtrs. 



Acrobolbus, Nees, in G. L. et IS". Synop. Hepat. p. 5 (1844) ; Carring. 

 in Brit. Hepat. p. 41 (1874). Gymnanthe, Taylor, in Lehm. El. 

 Nov. Pugill. 8, p. 1 (1844); Cooke, Brit. Hepat. p. 15, n. 76, f. 

 114. 



■" Involucre terminal, obovate, seated at right angles with the stem, 

 bulbous and rooting on the ventral aspect. Colesule wanting. 

 Calyptra attached to the bulbous base of the receptacle, sur- 

 rounded by and concrete with the entire portion of the involucre, 

 and bearing around the apex the abortive pistillidia." — Carring- 

 ton, in British Hcpaticae. 



Acrololbiis Wilsoni, Nees. Stems creeping, and mostly parasi- 

 tical on the stems of larger Hepatics, such as Radula and Erul- 

 lania. Leaves succubous, roundish or obovate, acutely bifid 

 half-way or more, rarely trilobate, closely placed on the stem, and 

 rather obliquely inserted. Amphigastria wanting. Eructification 

 tenninal. 



