HEPATIC^ OF CO. WICKLOW. 267 



13. S. LAPPONUM L. 



b. helvetica (VilL). 



X S. spuria Willd. (Lapponum x Arbuscnla). 



9. XitidulcB. 



14. S. Myrsinites L. 



X S. Wahlenbergii And. (Myrsinites x nigricans). 

 X S. serta B. White (Myrsinites x Arbuscula). 



15. S. HERBACEA L. 



X S. Grahami (Borr.) Bake)-, (herbacea x pliylicifolia). 

 X S. Moorei '* Watson L. C\" (herbacea x nigricans). 

 X S. simiilatrix B. White (herbacea x Arbuscula). 

 X S. sobrina B. White (herbacea x lapponum). 

 X S. margarita B. White (herbacea x aurita). 



IG. S. RETICULATA L. 



X S. semireticulata B. White (reticulata x nigricans). 

 X S. sibyllina B. White (reticulata x lapponum). 



C. Synandr^. 

 10. Fiirpurea, 



17. S. PURPUREA L. 



X S. rubra Hvds. (purpurea x viminalis). 

 X S. sordida Kern, (purpurea x ciuerea). 

 x S. dichroa Doll, (purpurea x aurita). 



HEPATIC.^ OF CO. WICKLOW. 



By David McArdle. 



" The Dargle River Lejeuneas are mostly Eu-L. flava, wliich is 

 evidently by far the commonest Irish Lejeunea.'' 



So writes my friend Mr. M. B. Slater, an accomplished 

 authority on these difficult plants. Amongst 24 letter-packets of 

 Lejeunea submitted to him for examination, which I and Mr. E. W. 

 Scully collected (with others appended), L. serpyllifolia occurs only 

 twice, and we believe it is by far the scarcer of the two. All the 

 numerous forms collected in the county Wicklow are referable to 

 the sub-species alhida Spruce = L. Moorei Lindberg, which we 

 have gathered almost green, yellow, and approaching to white. 



The Co. Kerry plants are nearer the type, and specimens which 

 I collected at the Hunting Tower, Killarney, approach the South 

 American plants closely. 



The many curious forms of L. flava which are to be found, 

 place those studying Lejeunea in considerable difficulty in defining 

 which is flava and which is serpyllifolia. That L. patens Lindberg, 

 is a form of the latter there can be no doubt ; it is well figured in 

 Dr. Moore's ' Irish HexDaticaB,' t. 43. I therefore trust I may be 

 permitted to quote, for the benefit of those who may have any 



