HvPNACEiE.] 124 [Isotliecinm. 



Eurhynchimn myosuroidcs Schimp. Synops. 549 (i860), 2 ed. 662. Hobk. SynopF. 152 

 (1873). Dix. James. Stud. Handb. 422 (i8g6). 



Rhynchostcgiiim myosuroidcs De Not. Epilogo 79 (1869). 



Dioicous ; in spreading dense soft }^ellOwish-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, %vith 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, yello\nsh. 

 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 infl. gemmiform. 



Hab. — On trunks of trees and shady rocks, not uncommon. Fr. 11 — 12. 

 Abundant at Killamey and in S. Wales. 



Var. /J. rivxilare 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 points, 

 sometimes serrate all round. 



Syn. — Var. p. riviilarc Holt. Limpr. Laubm. iii, 45. 



Isothecium Holtii Kindb. in Rev. bryol. 1895, P- ^i< European and N. Amer. Bryinse 37. 



H. alopccurum p. protcnsnm Turn. Muse. Hib. 164. 



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

 Callander and at Roy bridge, Inverness (Dixon i8g8) ! ! By the Wye, Erwood, Brecon, 

 and O'SuUivan's Cascade, Killarney (Binstead 1897) ! I Lustleigh, Devon aud Beddgelert 

 (Dixon). 



Var. y. teniiiiierve Kuidb. 



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

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

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

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

 conic, acute, not rostellate. 



Syn. — Isothecium myosuroidcs Var. brevincrve Kindb. Note on Canad. bryology (1893). 



Isothecium ienuinerve Kindb. Check list of Eur. and N. Amer. Mosses (1834). Europ. 

 and N. Amer. Bryinae 37 (1896). 



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

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



Var. h mimis Bagnall. 



