640 Proceedings of the Royal Irish Academy. 



fawn-coloured, or of a dirty green. Leaves closely imbricated on 

 the stem, bilobed, lower lobe roundish, apiculate, reflexed, the 

 smaller lobe half the size of the other, roundish, concave, margins 

 of both lobes more or less ciliately dentate. Colesule truncate, 

 dentate at the mouth. Capsule oval. 



Jungermannia resupinata, Linn. Sp. PL 1599 ; Engl. Bot. t. 2437 

 (non Hook.) ; Ekart, Synop. Jung. p. 26, t. xi. fig. 88 (excl. 

 fig. 3). Scapania resupinata, Dumort. Rev. Jung. p. 14, et Hepat. 

 Europ. p. 34 ; Carring. Brit. Junger. part 4, p. 77, pi. 8, fig. 26 

 [ex parte) (1845). Scapania sequiloba, var. foliis Isevibus, Grottsche, 

 MSS. Jens, in Bot. Tidsskr. 2, p. 288, n. 47 (1868). Martinellia 

 gracilis, Lindb. in Not. Soc. F. Fl. Fenn. 13, p. 365 (1874); Acta 

 Societatis Scientiarum Fennicse, x., p. 520 (1875). Jungermannia 

 recurvifolia, y. recurvifolia. Hook. Jung. t. 21, f. 8. 



Hab. Open heathy places chiefly, but also in woods and among rocks 

 in the more subalpine parts of the country. Very common and 

 widely distributed over Ireland, where it has been doing duty for 

 Scapania nemorosa, which latter, so far as I have seen or am aware, 

 is rare in Ireland. Dr. Carrington (in British Jungermannise, part 4, 

 p. 79) states he had done his best to investigate the synonymy of 

 this species, having devoted several days to it, with anything but 

 satisfactory results. To me the results appear to be more impor- 

 tant than they do to the author, as they have enabled me to 

 understand clearly a very common plant in Ireland, which I 

 never did before, nor do I think any former Irish cryptogamic 

 botanist understood it. Dr. Taylor's Jungermannia resupinata 

 (in Fl.Hib.p. 2, p. 62) is Hooker's plant (figured at tab. 23, Brit. 

 Jung, under that name) = J. compacta. Both; Scapania compacta, 

 Dumort. Dr. Taylor certainly considered the present species as 

 a state of nemorosa, and named it so repeatedly. Dumortier has 

 defined Smith's plant diiring a considerable number of years past, 

 both in his Recueil Jungermannise (1835), and Hepaticae Europa) 

 (1874). Although it varies much in size according to locality, it is 

 constant to its leading characters, and mostly to the peculiar fawn 

 colour. On the western coast of Ireland, I have seen it in dense 

 compact patches, nearly half a yard wide, where the moist winds 

 from the Atlantic were favourable for its growth. On Muckish 

 Mountain, Co. Donegal, I have seen it tall and straggling among 

 the heath in loose stems, quite unlike the fawn-coloured patches 

 on the west coast, yet easily recognizable as the same plant. 



9. Scapania nemorosa, Dumort. Dioecious, rarely autcecious. Stems 

 laxly csespitose. Shoots more or less erect. Leaves of a bright 

 green colour when fresh, pale green when dried, unequally bi- 

 lobed, inferior lobe obovate, recurved, smaller lobe about half the 

 size, both with ciliate-dentate margins, Colesule partly immersed,, 

 mouth truncate- ciliate. 



