294 T5ECENT ADDITIONS TO OUR MOSS FLOKA. 



bi-tripartite, robust, dense-leaved, with a few radicles. Leaves trifarious, 

 sqiiarroso-recurved, when dry twisted and somewhat crisped, elongate, 

 lanceolate, concave, complicate towards apex ; margin strongly revolute ; 

 nerve strong, reaching apex ; cells at base elongated, with sinuous walls 

 like those of Rhacomitrium, above irregularly stellate. — Dripping alpine 

 rocks. Ben Bulben, Sligo (Moore). 



Sect. 4. Si/ntrlckia. 



24. T. princeps, De Notaris, Syll. p. 170, 1838.— 5«;7jvZa Mfdleri, 

 Bry. Eur. 1842. 25. T. ruralls, L. 



36. T. intermedia, Bridel, Bry. Univ. i. p. 586. — T. riiralis, yS. minor, 

 Bry. Brit. Barbnla ruralis, (i. rupestris, Schp. — Dioicous, resembling 

 T. ruralis, but growing iu short, compact tufts, rufesceiit when dry, and 

 very hoary from the long hair-points of the leaves. Stem short, fastigiatc 

 branched. Leaves crowded, erect, appressed when dry, oblong spathulate, 

 carinate, obtusely rounded at apex ; margin recurved, and without the 

 two longitudinal striae seen in ruralis ; hair-point often longer than the 

 leaf, serrated. Cells twice smaller, very obscure, and papillose. Seta 

 and capsule much shorter, and also the teeth of peristome. — -Calcareous 

 rocks and old walls. 



27. T. papulosa, Wils. 28. T. latifoUa, Bruch. 29. T. suhulata, L. 

 Lindberg considers T. mucronifvlia, to be a variety of this. 



Sect. 5. Tortuosfe. 



30. T. tortnosa, (L.) Ehrt. 



31. T. hibernica, Mitten, Seem. Journ. Bot. 1867, p. 329. — Ancec- 

 tangium Horn scJinchian urn , Bry. Brit. TricJiostomum cirrhifuUnm., Schp. 

 ms. Didymodon controversns, Wils. ms. (Plate CXX. f. 5). — Stems elon- 

 gated, 2-4 iu. high, branched. Leaves laxly inserted, somewhat comose, 

 and stellate at summit; the base erect, dilated and clasping above, thence 

 spreading and divergent, ovato-lanceolate, passing into lineal-subulate, 

 acute, nearly straight, channelled, cirrhate when dry ; nerve yellowish, 

 continued to apex, smooth at back ; margin erect, quite entire. Cells at 

 base pellucid, elongate, rectangular, quickly passing into the minute 

 rounded obscure ones which form the rest of the leaf. — Mountains at 

 Dnnkerron, Killarney. Anoectanginm Ilorn^cliucJtinnum. has the basal 

 margin serrulate, and in Trichostomnm cylindricam the base is scarcely 

 wider than the upper part. 



32. T. nitida, Lindberg, Ocfv. Vet. A.k. Forhand. 1864, p. 2^2.— Tri- 

 cliostomum diffrnctnm, Mitten, Seem. Journ. Bot. 1868, p. 98. — Densely 

 Ctiespitose, blackish-green. Stem short, rigitl, dense leaved, branched. 

 Leaves erecto-patent, when dry arcuato-incurved, lanceolate, obtuse, chan- 

 nelled, quite entire; margin plane, a little undulated; nerve terete, very 

 thick, and ending in a very short apicidus, when dry pale, and glossy on 

 the back ; upper cells indistinct, very minute, densely papillose, those of 

 base much larger, pellucid, ascending obliquely upward toward margin. 

 Leaves very fragile, and usually broken in the middle. — South-west coast, 

 Plymouth (Holmes), Torqttay (Borrer), Shoreham Beach (Nowell). 



'33. T. simosa, Wilson, ms. ; Mitten, Journ. Bot. 1867, p. 327. — 

 Trichosfomuni siiiuosnm, Lindberg. Dicranella sinnosa, Wils. (Plate CXX. 

 f. G). — Densely caespitose, dull yellow-green above, fuscous below. Stems 



