TORTULACE^.] 196 [Pottia. 



(1869). DE NOT. Epil. Bri. it. 587. LINDB. de Tort. 221 (1864). MITT. Journ. Bot. 



1871, p. 4. HUSN. Mousses nord-ouest. 65 (1873). HOBK. Syn.br. m. 57 (1873). JURATZ. 



Laubm. oester.-ung. 94 (1882). LESQ. JAMES Mosses N. Amer. 102 (1884). 

 Pottia affinis FUERNR. 1. c. 

 Tortula Heimii MITT. Journ. Lin. Soc. Bot. xii, 165 (1869). LINDB. Muse, scand. 21 (1879). 



Autoicous and synoicous ; caespitose, pale yellow-green, more or 

 less branched. Lower leaves remote, broadly lanceolate, upper larger 

 crowded, concave, broadly elongato-lanc. acuminate, acute, serrate at 

 apex ; nerve reddish, vanishing in the point or slightly excurrent ; 

 margin plane, cells lax, thin pellucid and elongated at base, upper 

 hexagonal, minutely papillose, marginal usually smooth ; perich. 

 bracts larger and more acuminated. Caps, on a tall red seta, erect, 

 obovate and oblong, pachydermous, pale olive brown, finally ferruginous 

 and truncate ; cal. smooth, pale brown, with a black point ; lid from a 

 plano-convex base, longly and obliquely rostrate, when ripe raised on 

 the attached columella ; peristome none. Male on a short lateral 

 branch, bracts three, resembling the leaves, rarely synoicous. 



HAB. Moist gravelly banks by the sea and mouths of rivers ; not uncommon. 

 Fr. 4-5. 



Variable in size, in the length of the seta, capsule and lid, the serration 

 also sometimes becomes obsolete, and the nerve may vanish below the point, 

 at the point, or form an excurrent mucro ; it is therefore difficult to 

 define any distinct varieties. 



4. POTTIA TRUNCATULA (L.) Lindb. 



Autoicous ; laxly csespitose. Leaves obovate-oblong, acuminate, 

 mucronate with the excurrent nerve ; cells above hexagonal, chloro- 

 phyllose, smooth. Caps, obovate-spherical, deoperculate subhemi- 

 spherical ; lid rostrate, cal. smooth. (T. XXVIII, E.) 



SYN. Bryum truncatnlum L. Sp. pi. 1119 (1753). HUDS. Fl. angl. 408(1762). WEISS Cr. 



goett. 191 (1770). NECK. Meth. muse. 95 (1771). WITH. Bot. arr. br. veg. ii, 675 (1776). 



LIGHTF. Fl. scot, ii, 730 (1777). WEB. Spic. fl. goett. 109 (1778). CURTIS Fl. Lond. 



F. II, t. 71 (1778). Fl. Dan. t. 537. RELH. Fl. cant. 405 (1785). ABBOT Fl. bedf. 242 



(1798). HULL Br. fl. P. 2, 258 (1799). 

 Phascum truncatulum SWARTZ Meth. muse. 25 (1781). 

 Gymnostomum truncatulum HEDW. Fundam. ii, 87 (1782). TIMM Fl. meg. n. 726 (1788). 



ROTH Fl. germ, i, 53 (1788). HOFFM. Deutsch. fl. ii, 27 (1795). BRID. muse. rec. II, 



P. I, 38, t. i, f. 5 (1798) ; Bry. univ. i, 67 (1826). ROEHL. Moosg. Deutsch. 67 (1800). 



SM. Fl. brit. iii, 1158 (1804), Eng. Bot. t. 1975. TURN. Muse. hib. 7, t. i, fig. d-f. (1804). 



P. BEAUV. Prodr. 60 (1805). SCHULTZ Fl. starg. 279 (1806). HOOK. TAYL. muse. br. 12, 



t. 7 (1818). WAHLENB. Fl. ups. 390 (1820). HARTM. Skand. fl. 382 (1820). HOOK. Fl. 



scot. P. II, 122 (1821), Br. fl. ii, 8 (1833). MACK. Fl. hib. P. 2, 10 (1836). 

 Gymnast, truncatum HEDW. Stirp. i, 13, t. 5, f. 5-14(1787), Sp. muse. 30 (1801). SWARTZ 



Muse. suec. 20 (1799). BRID. Sp. muse. I, 30(1806), Mant. 15 (1819). SCHKUHR 



Deutsch, kr. gew. P. II, 21, 1. 10 (1810). SCHWAEG. Suppl. I, P. I, 19 (1811). WAHLENB. 



Fl. carp. 333 (1814). MART. Fl. cr. erl. 120 (1817). SAVI Bot. etrusc. iii, 32 (1818). 



FUNCK Moost. 6, t. 4 (1821). GRAY Nat. arr. br. pi. i, 715 (1821). NEES HORNSCH. 



Bry. germ, i, 132, t. 9, f. 6 (1823). HUEBEN. Muse. germ. 39 (1833). DE NOT. Syllab. 



285 ( J 838). 

 Pottia enstoma ft. minor EHRH. Beitr. i, 188 (1787). 



