614 Proceedings of the Royal Irish Academy. 



et Hepat. Europ. p. 19; Taylor, in Gr. L. et N. Synop. Hep. 

 p. 387 ; Eabenhor. Hep. Europ. exsic. n. 322 ; Cooke, Erit. Jung, 

 p. 20, fig. 155. 

 Hab. On the stems of trees and on mosses. Abundant in the Xil- 

 larney woods, and other parts of Kerry and Cork ; Kylemore 

 Castle, Co. Gralway ; Collin Grlen, Belfast ; Woodlands, Dublin ; 

 Luggielaw, and Powerscourt, Wicklow ; Glenf arn demesne, Co. 

 Leitrim. 



8. Lejeunea serpyUifolia (IMich., Dicks.), Libert. Autoecious. Stems 

 prostrate or creeping, pinnately branched. Leaves incubous, 

 2-lobed, lobes unequal, the upper beicg much the largest and 

 of a roundish-oblong fonn, the lo\rer much smaller, and invo- 

 lute. Amphigastiia wide, roundish, deeply bifid. Colesule some- 

 what pear-shaped or obovate, mouth angled and protruding. 



Jungermannia serpyUifolia, Dicks. PL Cry]3t. Brit. 4, p. 19 ; Engl. 



Bot. t. 2537 (escl. synon.) ; Hook. Brit. Jung. t. 42 ; Lindenb. 



Hep. Europ. p. 21. Lejeunea serpyUifolia, Lib. in Ann. Gen. 



Sc. Phys. 6, p. 374 ; Dumort. Comm. Bot. p. 3 ; Syll. Jung. 



Eur. p. 33, et Hepat. Europ. p. 21 ; G-. L. et 1!^. Synop. Hepat. 



p. 374; Eabenhor. Hep. Eur. exsic. n. 435. 

 Hab. On trunks of trees covered with the larger mosses, &c., and on 



damp banks among mosses. Generally distributed through 



Ireland. 

 Yar. /3. thymifolia, Carrington, in Trans. Bot. Soc. Edin. 7, p. 456. 



"Leaves larger, elliptic-ovate, very convex, closely imbricated, 



inflexed." 



Var. y. heterojjJiylla, Carrington. "Branches attenuate, microphyllous. 

 Leaves plane, lobule obsolete, variously shaped, distant, chloro- 

 phyllose. 



Hab. On wet shady rocks. O'Sullivan's cascade, and near Tore Water- 

 fall, Dr. Carrington. 



Var. (B. cavifolia (Ehi'h.), Lindb. "Leaves crowded, front lobe 

 convex, incumbent when diy, more spreading from the basal sac, 

 generally much decurved, oblique, broadly ovate, very blunt, 

 yet sometimes naiTowed distinctly at apex, never pointed, very 

 entire, basal lobe 3-5 times smaller, cells very full of chlo- 

 rophyll and thickened, trigonal spaces distinct. Amphigastria 

 subadpressed, equally large or larger than the hinder lobe, eon- 

 vex, otherwise as in tj^e. Colesule more prominent, rising from a 

 narrow base, oval pyiiform, the upper 4th pai't 5-plicate, the rest 

 as in type." — Linclberg. 



Hab. Glena, Killamey, on mosses, and on the stems of trees. Tore 

 Cascade, among Hypniim eiigyrium, 1873, Dr. Lindberg. Dr. 

 Lindberg states that this form is the common form in Scandi- 

 navia, where the typical form is much rarer. 



