ToRTULACE^.] 257 [Barbula. 



Although Mr. Mitten has referred this moss to another genus, in the 

 absence of fruit I prefer retaining it near Leptodontimn flexifolium, to which in 

 areolation it is certainly allied, though quite distinct as a species ; the leaves 

 are not squarrose, but divergent, and the gemmEe have 2 — 3 transverse 

 septa. 



Although it disappears with the removal of the thatch, when this has 

 been renewed and is passing into decay, L. gemmascens is certain to reappear. 



3. LEPTODONTIUM RECURVIFOLIUM (Tayl.) Lindb. 



Dioicous ; tall, loosely casspitose. Leaves squarrose, elliptic- 

 oblong, pale-bordered, coarsely serrate, nerve excurrent in an apiculus. 

 (T. XXXVIII, B.) 



Syn. — Byyiim recurvifolium Tayl. MSS. 



Didymodon yecurvifoUus WiLS. Bry. br. no, t. 41 (1855). Berk. Handb. br. m. 266 

 (1863). HoBK. Syn. br. m. 60 (1873). Schimp. Synops. 2 ed. 165 (1876). 



Leptodontium recurvifolium Lindb. De Tort. 227 in obs. (1864). 



Dioicous ; in lax irregular tufts, deep green above, fuscous or black 

 below. Stem i — 4 in. high, geniculate, erect, free from radicles. Leaves 

 from an erect base, squarrose, patulous and somewhat recurved from 

 the middle, crispate and undulate when dry, from an ovate or oblong 

 base, broadly lanceolate, or elliptic oblong, obtuse, somewhat coriaceous; 

 nerve thin semiterete, broader below, excurrent in a short apiculus ; 

 margin plane, serrate in the upper half; basal cells minute, pellucid, 

 rectangular, upper rounded, minutely papillose, opake with chlorophyl, 

 except the 3 — 5 marginal rows which are empty, smooth, and form a 

 pale border. Fruit unknown. 



Hab.- — Wet rocky places in mountains, very rare. 



Knockavohila, Killarney (Taylor 1842) ! Ben Voirlich by Loch Lomond (McKinlay 

 1863) ! Glyder Vaur {Griffith 1878) ! ! Tyn-y.groes [Holt 1885) ! ! 



This fine moss appears to be extinct both in the Irish and Scotch 

 localities, so that its discovery in Wales is an interesting event. The Ben 

 Voirlich plant has the leaves more coarsely areolate, with a stronger nerve, 

 the apex more obtuse and larger serratures. 



9. BARBULA Hedw. 



Fund. muse. 11, 92 (1782). 



Plants casspitose, branched, slender, usually tinged with rufous- or 

 rusty-brown. Leaves small, from an oval base, gradually lanceolate, 

 not accrescent upward; nerve terete, vanishing or rarely excurrent; 



