TORTULACE^.] 198 [Pottia. 



Gymnast, truncatiihtm var. yg. HOFFM. Duetsch. fl. ii, 27 (1795). HOOK. TAYL. Muse. 



br. 2 ed. 22 (1827). 

 Pottia intermedia FUERNR. in Flora xii, P. 2, Erganz. 10 (1829). RABENH. Deutsch. kr. fl. 



ii, S. 3, 97 (1848). DE NOT. Epil. bri. ital. 588 (1869). LINDB. in Journ. Lin. Soc. 



Botany xi, 461 (1870). JURATZKA Laubm. oester.-ung. 93 (1882). 

 Pottia enstoma HAMPE in Flora xx, P. I, 287 (1837). 

 Pottia truncata Var (3. major ct y. snbcylindrica BR. SCHIMP. Bry. Eur. fasc. 18 20, p. 9, 



t. 5 (1843). SCHIMP. Synops. 124 (1860). WILS. Bry. br. HOBK. HUSN. 

 Pottia lanceolata Var. y. siibgymnostoma LINDB. de Tort. 222 (1864). 

 Pottia lane. Var. gymnostoma SCHIMP. Synops. 2 ed. 158 (1876). 

 Tortula intermedia LINDB. Muse, scand. 21 (1879). 



Autoicous ; resembling P. truncatula, but larger. Stem erect, longer, 

 lax-leaved below, dense above. Leaves pale green, accrescent upward, 

 erect, subpatulous, oblong, faintly papillose, the perich. bracts oblongo- 

 lanc. narrowed at base, margin more or less revolute above the middle, 

 entire, nerve brown, excurrent in an apiculus ; areolation as in P. trun- 

 catula. Seta pale red or yellow, caps, elliptico-cylindric, constricted 

 below mouth when dry ; cal. smooth, cucullate, subulate ; lid obliquely 

 rostellate, paler than caps., ann. broad of 2 3 rows of closely adherent 

 cells ; a rudimentary peristome often present. Male infl. gemmaceous. 



HAB. Banks and walls, not uncommon. Fr. 12 3. 



Cork (Taylor). Dublin (Wilson 1830) ! ! Henfield (Borrer 1836) ! Over, Cheshire 

 (Wilson 1844) ! ! Beaumaris (Sidebotham 1863) ! Wetherby (Wesley 1878) ! ! Newlyn 

 cliff (Curnow 1872) ! ! Bodmin (Tellam 1878) ! ! Miller's dale (Holt 1881) ! ! 



This does not differ from P. truncatula in the form of the capsule only, 

 but we have in addition the presence of an annulus, and papillose leaves with 

 revolute margins. Mitten regards it as a gymnostomous form of P. lanceolata, 

 but the areolation is laxer than in that species. 



6. POTTIA LITTORALIS Mitten. 



Autoicous ; resembling P. intermedia, but with longer leaves ; upper 

 cells smaller, quite smooth, the walls much more incrassate. 

 (T. XXVIII, G.) 



SYN. Pottia littoralis MITT. Journ. Bot. 1871, p. 4. BRAITHW. Journ. Bot. 1871, p. 290. HOBK. 

 Syn. br. m. 56 (1873). 



Autoicous ; resembling P. intermedia, pale below, green or bluish 

 green above. Leaves much longer, more erect, sheathing at base, more 

 obtuse, with the nerve excurrent in a short point, lower smaller with a 

 longly excurrent nerve; upper cells smaller, quite smooth, with the 

 wall much more incrassate, basal pellucid, very narrow and elongated. 

 Seta pale orange-red, elongated ; caps, oblong-oval, slightly narrowed at 

 mouth, ferruginous ; cal. smooth; ann. adherent, of one row of cells, lid 

 rostrate, slightly twisted, oblique ; spores ferruginous, scarcely rough. 

 Male infl. gemmiform. 

 HAB. Sandy ground near the sea ; not common. Fr. 2 4. 



