604 Proceedings of the Royal Irish Academy. 



Hab. On damp rocky places, walls of bridges, and on damp sandy 

 ground. Dunkerron, Co. Kerry, Dr. Taylor. Dingle bay, Dr. 

 Carrington. IS'ear Cork, and Fermoy, Isaac Carroll, Esq. Abun- 

 dant on tlie walls of the bridge at Cong, Co. Galway ; at Sillagb- 

 braes, near Larne, Co. Antrim; on sandy ground at the North Bull, 

 near Dublin, David Macardle. This plant is found occasionally 

 in the vicinity of its near ally Preissia commutata, JS^ees, from 

 •which the barbate under side of the fertile receptacle, and of the 

 apex of the pedicel, and the sessile male flowers are ready and 

 obvious characters which will always distinguish it. 



LirNTJLAEiA, Micheli. 



Lunularia, Mich. Isox. pi. gen. p. 4, tab. 4 (1741) ; Eaddi, in Opusc. 

 Scient. di Bologna, ii., p. 353 (1818). Marchantia cruciata, Linn. 

 Sp. PI. (1753). 



Dioecious. Fertile receptacle deeply divided into narrow loculi, locuU. 

 tubulose, opening with a horizontal fissure. Capsule 4-valved, 

 exserted. Male receptacle sessile, with a membranaceous elevated 

 margin. 



Lumdaria crucicda, Linn. Dumort. Fronds gregarious, 1 to 3 

 inches long, lobed and variously divided, waved and ele- 

 vated at the margins, cuticle rough, with elevated pores, under 

 surfaces more or less covered with scariose scales. Gemmiferous 

 scyphi occur on surfaces of both male and female fi'onds in lunu- 

 late or crescent-shaped disks, at all seasons of the year. Fertile 

 receptacle pedunculated, globular when young, at length quad- 

 rifid, the loculi of which open by a horizontal fissure, and 

 are usually four in number. Colesule wanting. Calyptra rup- 

 turing, and remaining in the bottom of the loculus. Male recep- 

 tacle sessile, immersed in the frond and situated at the top of the 

 sinuses. The ovate anthers are easily removed from the mass, 

 they are ovate, with a grumose centre, and have a broad pellucid 

 border. 



Lunularia vnlgaris, Micheli, l^ov. Gen. 4, t. 4. Marchantia cruciata, 

 Linn. Sp. PI. 1604; Haller, St.Helv. (ed. 1768), tom. 3, p. 65, 

 '^0. 1888 ; Huds. Fl. Angl. p. 52 ; Wither, Syst. Arr. Br. PL cd. 

 1801, vol. 3, p. 869. Lunularia vulgaris, Taylor, in Fl. Hib. 

 p. 52 (1836). L. cruciata, Dumort. Hepat. Europ. (1834); Lind- 

 berg, Hepat. in Hibernia lectse (1875). 



Hab. Damp ground, and on moist limestone walls ; not very common. 

 At Altadore glen I have observed continuous patches upwards 

 of a yard in extent, yet not a single exserted female receptacle on 

 them, though both sexes occur there. I have only once seen good 

 fertile receptacles produced, which happened in Glasnevin Botanic 

 Garden. They were sent to be figured for the supplement to 

 English Botany, and a pretty good figure was made, which, 

 however, has never been published. 



