12 Dr. Taylor on some new British Jungermannise. 



has not been seen, nor indeed has the plant been found again by 

 the numerous acute observers that have ascended its native 

 mountain. 



2. Jungermannia curta, Martius. Caule subcaespitoso, abbreviate, 

 adscendente ; foliis inferioribus multo minoribus, subimbricatis, 

 apice dentatis ; lobo inferiori obovato, planiusculo, superiori mi- 

 nori, acuto, inferiorum subquadrato. 



Scapania curta, Nees, Lindenberg et Gottsche, Synopsis Hepaticarum, 

 p. 69 ; Hooker's Brit. Jung. t. 21. figs. 17, 18 and 19. 



So variable is this species, that in the l Synopsis ' no less than 

 nine varieties are distinguished. This will account, in some de- 

 gree, for the late period of recognizing this species in Britain. 

 In Ireland it occurs in a great variety of situations, on stones on 

 mountain sides facing the north ; but its most favourite locality is 

 in old woods on damp rocks, as at Cromaglown near Killarney. 

 The size is so variable, that some states closely resemble Jung, 

 nemorosa, L., a species, perhaps, the most difficult to understand 

 of any of the genus. 



3. Jungermannia Thuja, Dicks. Caule caespitoso, adscendente, 

 subpinnatim ramoso, supra convexo, glabro ; foliis arete imbricatis, 

 lobo inferiori patenti, oblongo, recurvo, integerrimo, inferiori 

 ovato, obtusiusculo, margine reflexo ; stipulis oblongis, acutis, in- 

 tegerrimis, margine reflexis, apice recurvis ; perichaetii lateralis, 

 emergentis foliis majoribus ciliato-serratis. 



On stones ; side of Lough Finnehy, near Dunkerron, co. of Kerry. 



Tufts wide, olive-green, the older parts purplish brown, shining, 

 the shoots acuminated. In plants with perichatia the branches 

 are very short. Mr. Dickson long since found this plant on the 

 sides of mountain lakes in Scotland, and very properly judged it 

 to be distinct from Jung, platyphylla, L. He gave, however, no 

 diagnosis, whence the two have been confounded by all subse- 

 quent writers. 



It may be known by its greater size, its shining surface, its 

 acuminate shoots, its denser structure, its perichatia prominent 

 beyond the cauline leaves, its perichsetial leaves larger, wider, 

 more divergent, and always ciliato- serrate, its divisions less regu- 

 larly pinnate, the closer imbrication of the leaves, and the more 

 patent position of their inferior lobes. 



4. Jungermannia rivularis, Nees. Caule caespitoso, subpinnatim 

 ramoso, adscendente ; foliis approximatis, patentibus, lobo supe- 

 riori ovato-rotundato, piano, inferiori minuto, ovato, obtuso, utro- 

 que integerrimo : stipulis minutis obovatis integerrimis. 



On stones in streams at Dunkerron, co. of Kerry. 



Tufts wide, loose, dark green, the younger shoots of a lively 



