112 Proceedings of the Royal Irish Academy. 



over for the preceding species. Dr. Spruce writes' : — " A few 

 salient and easily observed characters siiifice to distinguish the 

 two. In. C. sphagni, the trailing stems grow out at the apex 

 almost indefinitely. I have seen them six to eight inches 

 long, lengthening by repeated archings, and rooting by flagellse 

 at the descending flexures, and are clad throughout almost 

 uniformly with leaves of equal size ; the few branches preserve 

 the same habit and character, nor are they ever seen erect and 

 gemmiparous. In C. denudata we have first an intricately- 

 branched leafless caudex, or rhizome, which puts forth 

 assurgent arcuate branched stems, that scarcely ever root at the 

 decurved apex ; and both stems and branches are (normally) 

 short, linear, lanceolate in outline, from the leaves being 

 broadest at the middle of the branch and decreasing in size 

 toward either extremity ; but there are nearly always present 

 a few erect branches, gemmiparous at the apex, on which the 

 leaves decrease in size from the base upwards, while the 

 associated folioles (stipules) increase, so that the upper leaves 

 and stipules are nearly equal in size ; whereas the folioles that 

 are scarcely ever absent from the ordinary branches and the 

 stem are many times smaller than the adjacent leaves. But on 

 C. sphagni there are either no folioles at all, or only a few 

 minute ones near the apex of the stem and branches. The 

 leaves scarcely differ in form in the two species, but are rather 

 smaller and more pellucid in C. denudata, and never secund 

 (as often in C. spliagni). 



Plentiful on the peat amongst the rocks on several parts of 

 the hill, very fine and abundant on a small bog near the 

 Bally kill plantation (fertile). Bare or overlooked in Ireland, 

 once found on the side of the Corslieve mountain near Bangor, 

 Co. Mayo, in 1859, by Dr. D, Moore. 

 7. '^Cephaloziafrancisci,^o6k(J)vim.ovt). Plate III. Hook. Brit. Jung, 

 excellent fig. t. 49. Jenson in G. et Eab. Hep. Eur. IS'o. 301 

 sub. nom. J. catanulata. Carr et Pearson Hep. Brit. Exsicc. fasc. 

 3, No. 176-177 vera. Dioecious, cladocarpous, coespitose, green 

 or purple, flagelliferous, sending out slightly branched stems 

 from a creeping, whitish, branched, nearly leafless, radiculose 

 root. Leaves, small, rigid, patent or sub-imbricate, ovate, orbicu- 

 late, concave, cloven at the apex to -^— t, rarely even to i, into two 



1 On Anomoclada, by Dr. Eichard Spruce, in Journal of Botany, 1876. 



