HYPNACE^.J 124 [Isothecium. 



Eurhynchium myosuroides SCHIMP. Synops. 549 (1860), 2 ed. 662. HOBK. Synops. 152 

 (1873). Dix. JAMES. Stud. Handb. 422 (1896). 



Rhynchostegitim myosuroides DE NOT. Epilogo 79 (1869). 



Dioicous ; in spreading dense soft yellowish-green tufts ; main stem 

 slender, stoloniform, the secondary dendroid, branched at top, at base 

 with ascending stolons. Branches often secund, pointed at end ; stolon 

 leaves distant, recurved, nerveless, with long points ; stem-leaves crowded, 

 erecto-patent, decurrent and cordate-ovate at base, lanceolate acuminate 

 with a long point J length of leaf, sharply serrate at point, nerve vanishing 

 at middle. Cells incrassate, lineal, at angles small quadrate, yellowish. 

 Branch-leaves longish lane, sharply serrate above, nerved to middle. 

 Perichsetial squarroso-recurved, inner acuminate, sharply serrated above, 

 with a short thin nerve, seta red, smooth, capsule slightly cernuous, 

 longish oval, reddish-brown, regular or a little curved, lid conic, pointed ; 

 peristome yellow, teeth lanceolate-subulate, endostome pale, the processes 

 cleft at the keel, cilia 2 3. Male inrl. gemmiform. 



HAB. On trunks of trees and shady rocks, not uncommon. Fr. n 12. 

 Abundant at Killarney and in S. Wales. 



Var. p. rivulare Holt in litt. 



Plants rigid dark or yellowish green, with long straight subjulaceous 

 branches, stem-leaves short, broad at base with short points, indistinctly 

 toothed, nerve short, simple or forked ; branch-leaves short, broad at point?, 

 sometimes serrate all round. 



SYN. Var. ft, rivulare HOLT. LIMPR. Laubm. iii, 45. 



Isothecium Holtll KINDB. in Rev. bryol. 1895, P- 83, European and N. Amer. Bryinse 37. 

 H. alopecurum ft. protensum TURN. Muse. Hib. 164. 



HAB. On rocks and stones in streams. Tyn-y-groes, S. Wales (Holt 1885) ! ! Bracklin falls, 

 Callander and at Roy bridge, Inverness (Dixon 1898) ! ! By the Wye, Erwood, Brecon, 

 and O'Sulli\'an's Cascade, Killarney (Binstead 1897) ! ! Lustleigh, Devon aud Beddgelert 

 (Dixon). 



Var. y. tenuinerve Kindb. 



Dark green, rigid, with numerous short branches; stem-leaves wide and 

 cordate at base, deltoid with a long subulate-setaceous point, nearly entire, 

 nerve faint, vanishing about middle, sometimes forked, sometimes absent ; 

 branch-leaves ovato-lanceolate, acuminate, sharply serrated. Lid of capsule 

 conic, acute, not rostellate. 



Slfl.Isotkecium myosuroides Var. brevinervc KINDB. Note on Canad. bryology (1893). 



Isothecium tenuinerve KINDS. Check list of Eur. and N. Amer. Mosses (1834). Europ. 

 and N. Amer. Bryinse 37 (1896). 



HAB. Ben Voirlich (MacKinlay 1863). Slieve League, Donegal (Dixon). Ben Laoigh, 

 Perthsh. (Dixon). Ptarmigan mountain, Inversanda, Ardgour, Argyllsh. (Harting 1900) ! ! 



Var. L minus Bagnall. 



