268 HEPATIC^ OF CO. WICKLOW. 



difficulty in defining them, the distinctions given in Dr. Spruce's 

 grand work * * Hepatic^e Amazonicae et Andinte,' p. 271 : — 



" A few easily-observed characters usually suffice to distinguish 

 every form of L. serpijlli folia Dicks, from L. flava Sw. (1) The 

 size is smaller and the colour more rarely yellowish ; (2) the leaves 

 rounder, and with a much longer and more turgid lobule, sometimes 

 equalling half the leaf; (3) the cells larger, -^^ mm. in diameter 

 against ^^"¥0 ^^- ^^^ L.fiava; (4) the under leaves variable in size, 

 generally smaller than in L. jiava, always cloven quite to the 

 middle, and with the segments oftener acute (although in some 

 forms obtuse) ; (5) the perianths rather shorter, acutely 5-cariuate 

 (whereas in every form of L. jiava the keels are very slightly 

 raised and obtuse)." 



The following are the localities for the plant known to me : — 



Eu-Lejeunea Jiava Swz. (approaching the type). 



Hab. Killarney. J. T. Mackay. Specimens in Hookerian 

 Herbarium. Cromaglown, Dr. Moore, 1862. Near the Hunting 

 Tower, Cromaglown, D. McA., 1878. From the drawing of the 

 perianth of Plate 2537, in ' English Botany,' this is evidently the 

 plant which was collected and not serpyUi folia. 



— Sub-species albida Spruce = L. Moorei Lindberg, Act. Soc. 

 Fenn. x. p. 487. Moore on Irish HepaticcB, p. 615, Plate 44 (good). 



Hab. Co. Kerry : Cromaglown, Killarney, Dr. Moore, 1862 — 

 1875 ; O'SulHvan's Cascade, Killarney, Dr. Moore and Dr. Lindberg, 

 1873; Cromaglown, D. 2IcA., 1878. Co. Galway : in the wood 

 near the Castle, Kylemore, Dr. Moore 1873. Co. Wicklow : Alta- 

 dore Glen, 1887— 8; Glencullen, 1877; Dargle River, 1889. In 

 the last three stations it is abundant, and will doubtless be found 

 in most of the moist shaded glens through the country. 



L. serpyllifolia Libert. Glencullen, 1887. Dargle Eiver, 1889, 

 sparingly. 



Homalo-Lejeunea Mackaii Hook. F. Engl. Bot. t. 2573 ; Hook. 

 Brit. Jung. t. 63. Phraymicoma Mackaii Dumort. Comm. Bot. 

 p. 112; Lindberg Hepat. Scand. Exsic. fasc. i. This is the only 

 British species representing the section, — four others belong to 

 Mexico and Brazil, — and is rather a scarce plant in Ireland. 

 Frequent at Killarney, Dr. Moore ; on limestone rocks on the 

 margin of a small lal^e near Letterfrack, Co. Galway, Dr. Moore 

 and D. McA., 1874. Reported also from Woodlands, near Dublin, 

 and from Cork. Not included in the Hepatiac of the Flora of the 

 N.E. of Ireland. Plentiful on the faces of the moist rocks on the 

 Dargle River, Co. Wicidow, D. McA. and U. W. S., 1889. This is 

 a new locality ; probably the plant is more widely distributed and 

 may be inadvertently passed over for Radula complanata. It may 

 be readily distinguished in the field by the large obcordate un- 

 divided under-l'iaves (hitipules), which are wider thau the stem. 



Conocephalus conicus Neck. Dumort. Marchantia conica Eng. 

 Bot. t. 504. Abunlant in frdt by the margin of the Dargle River, 

 1889. 



Transactions and Troceedings of the Bot. Soc, Edinburgh, Vol. XV. pt. I. 



