TORTULACE^.] 260 [Barbula. 



HAB. In similar localities, but less frequent. 



Nant-y-Fydd, Wrexham (Bowman) ! ! Trefriew, N. Wales (Dr. Wood 1861) ! Pont-y- 

 Prid (Holmes 1878) ! ! Ptarmigan Mtn., Perth (Holt 1880) ! ! Cautley Spout, Yorks. 

 (West 1881) ! ! Glen Meay, I. of Man (Holt 1880) ! ! Ravensdale, Derby (Holt 1883) ! ! 

 Ben Laoigh, Perth (Ewing 1884) ! ! Gainford, Durham (R. Barnes 1887) !! 



Frequently met with on mountain rocks and often encrusted with lime. 

 It varies greatly in height and density, and also in the form of capsule and 

 length of leaves, and after much study we have come to the conclusion that 

 H. commutatum cannot be maintained as a species, for the two forms of 

 areolation run into each other, even on the same plant. 



B. curvirostris much resembles Mollia aruginosa, but may be known by its 

 broader leaves with recurved margins and narrower nerve, the cells lax and 

 hyaline at base, quadrate and well defined above, the pachydermous rufous 

 capsule, and subulate systylious lid. 



Lindberg distinguishes three forms of the species, a. scabra with shorter 

 leaves, and scabrous, quadrate cells. (3. Iceviusciila with long narrow leaves, 

 and scarcely scabrous quadrate cells, y. commutata, with long narrow leaves, 

 and smooth rectangular cells. 



Sect. 2. ERYTHROPHYLLUM Lindb. Leaves lanceolate, acuminate, 

 the lower rusty red. Capsule subcylindric, teeth 16, lanceolate, tender, with 

 scarcely any basal membrane. 



2. BARBULA KUBELLA (Hoffm.) Mitt. 



Paroicous. Leaves recurved, lineal-lanceolate, nerved to apex, 

 lower red, margin recurved. Caps, cylindric, lid short-beaked, teeth pale 

 red. (T. XXXIX, A.) 



SYN. Bryum rubellum HOFFM. Deutsch. fl. ii,33 (1795). 

 Grimmia rubella ROTH Fl. germ, iii, P. I, 149 (1800). 

 Weissia rubella ROEHL. Moosg. deutsch. 142 (1800). 

 Grimmia recurvirostris SM. Fl. brit. 1190, excl. syn. (1804) ; Eng. bot. t. 1438. TURN. 



Muse. hib. 19 (1804). 

 Grimmia curvirostris WEB. MOHR Bot. Tasch. 135 (1807). VOIT in STURM Deutsch. fl. 



ii, heft 14 (1813) ; Muse, herbip. 29 (1812). 

 Weissia curvirostra HOOK. TAYL. Muse. brit. 46 excl. syn. t. 14 (1818). HOOK. Fl. scot. 



P. II, 130 (1821), Br. fl. ii, 22 (1833). 

 Anacalypta recurvirostris FUERN. in Flora xii, P II, Erg. 25 (1829). NEES HORNSCH. Bry. 



germ, ii, P. II, 151 excl. syn. t. 37, f. 6 (1831). 

 Anacalypta rubella HUEBEN. muse. germ. 119 (1833). 

 Didymodon rubellus BR. SCH. Bry. eur. fasc. 29-30, p. 3 excl. syn. t. i (1846). WILS. Bry. 



br. 106, t. 14 (1855). SCHIMP. Synops. 130 (1860), 2 ed. 160. BERK. Handb. br. m. 



264 (1863). HOBK. Syn. br. m. 58 (1873). HUSN. Mouss. nord-ouest 68 (1873), Muse. 



gall. 82, t. 23 (1885). JURATZ. Laubm. oesterr.-ung. 98 (1833). LESQ. JAMES Mosses 



N. Amer. 104 (1884). 

 Trickostomiim rubellum RABENH. Deutsch. kr. fl. ii, S. Ill, 115 excl. syn. (1848). C. 



MUELL. Synops. i, 581 excl. syn. (1849). HARTM. Sk. fl. 7 ed. 381 (1858). LINUB. De 



Tort. 226 (1864). MILDE Bry. siles. 101 (1869). 

 Barbula rubella MITT. Journ. Linn. soc. xii, 162 (1869). LINDB. Muse, scand. 22 (1879). 



Paroicous and synoicous ; caespitose, deep green above, ferruginous 

 red below, i 2in. high, slender, branched. Leaves curled when dry, 



