TORTULACE^E.] 2O7 [Tortula. 



i. TORTULA PUSILLA (Bed.) Mitt. 



Autoicous. Leaves obovate, piliferous, concave, lamelligerous in the 

 upper part. Caps, ovate, gymnostomous. (T. XXX, C.) 



SYN. Bryum pusillurn HEDW. Fund. muse. II, 32 (1782). RELH. Fl. cant. 404 (1785). 



LAICH. PI. eur. 484 (1794). WITH. Bot. arr. br. veg. 3 ed. iii, 811 (1796). ABBOT Fl. 



bedf. 240 (1798). HULL Br. fl. P. II, 256 (1799). 

 Gyinnostomum pusillum HEDW. op. c. 87. 

 Gymn. ovatum HEDW. Stirp. cr. i, 16, t. b (1787), Sp. muse. 31. ROTH Tent. fl. germ, i, 453 



(1788), iii, P. II, 123. TIMM Fl. meg. n. 724 (1788). SCHRANK Baiers. fl. ii, 438 (1789). 



SIBTH. Fl. oxon. 272 (1794). HOFFM. Deutsch. fl. ii, 27 (1795). BRID. Muse. rec. II, 



P. I, 40 (1798), Sp. muse. I, 31 (1806), Mant. 12 (1819), Bry. univ. i, 59 (1826). SWARTZ 



Muse. suec. 20 (1799). ROEHL. Moosg. deutsch. 15 (1800), Ann. wett. ges. i, 121, 



Deutsch. fl. iii, 38 (1813). TURN. Muse. hib. 9 (1804). SM. Fl. brit. 1160 (1804) ; Eng. 



bot. t. 1889. P. BEAUV. Prodr. 59 (1805). SCHULTZ Fl. starg. 279 (1806). WEB. 



MOHR Bot. Tasch. 80 (1807). SCHKUHR Deutsch. kr. gew. P. II, 20, t. 9 (1810). 



SCHWAEG. Suppl. I, P. I, 79 (1811). VOIT Muse. herb. 15 (1812). WAHLENB. Fl. carp. 



334 (1814) ; Fl. ups. 390 (1820). MART. Fl. cr. erl. 420 (1817). HOOK. TAYL. Muse. br. 



ii, t. 7 (1818). HARTM. Skand. fl. 383 (1820). FUNCK Moost. 5, t. 4 (1821). HOOK. 



Fl. scot. P. 2, 122 (1821), Br. fl. ii, 8 (1833). GRAY Nat. arr. br. pi. i, 715 (1821). 



ZENK. DIETR. Muse. thur. II, n. 47 (1822). NEES HORNSCH. Bry. germ, i, 128, t. 9, f. 



5 (1823). HUEBEN. Muse. germ. 36 (1833). MACK. Fl. hib. P. 2, 10 (1836). DE NOT. 



Syll. 284 (1838). 

 Pottia cavifolia EHRH. Beitr. i, 187 (1787). KUNZE Deutsch. cr. gew. 20 (1795). BR. 



SCH. Bry. eur. f. 1820, p. 7, t. 2 (1843). C. MUELL. Synops. i, 550 (1849). RABENH. 



Deutsch. kr. fl. ii, s. 3, 96 (1848). WILS. Bry. br. 92, t. 7 (1855). SCHIMP. Syn. 122 



(1860), 2 ed. 151. BERK. Handb. br. m. 269, t. 23, f. 2, e. (1863). DE NOT. Epil. 585 



(1869). MILDE Bry. sil. 95 (1869). HUSN. Mouss. nord-ouest. 64 (1873). LESQ. JAMES 



Mosses N. Amer. 101 (1884). 

 Bryum ovatum DICKS. Crypt. II, 4 (1790). 

 Pottia ovata FUERNR. in Flora xii, P. II, Erganz. 10 (1829). 

 Pottia pusilla LINDB. in Oefv. vet. ak. foerh. xx, 410 (1863) ; de Tort. 218 (1864). HOBK. 



Syn. br. m. 55 (1873). 



Tortula pusilla MITT. Journ. Linn. Soc. Bot. xii, 165 (1869). 

 Pterigoneurum cavifolium JURATZ. Laubm. oester.-ung. 96 (1882). 



Autoicous; stems simple, short. Leaves obovate-oblong, very concave, 

 subimbricated, erecto-patent, crowded into a gemmule ; nerve excurrent 

 as a hair of variable length, bearing on the upper side two follicles which 

 burst and form 4 lamellae, decurrent on the nerve ; cells above quadrate, 

 at base rectangular. Caps, on a short red seta, ovate or elliptic, brown, 

 gymnostomous ; annulus of two rows of cells, lid shorter than caps, 

 obliquely rostellate. Male infl. gemmiform at base of fruiting shoot, 

 bracts broadly ovate, nerved half-way. 



HAB. On banks and tops of walls. Fr. i 3. 



A very variable plant, in the length of the seta, and the hair-point to 

 the leaf, and so closely allied to the next species that it must be placed with 

 it, and therefore to be regarded as the connecting link between Pottia and 

 Tortula. Another of this group T. subsessilis (BRID.) is found in central 

 Europe. 



Var. /3. incana (Nees Hornsch.) 



Plants short in small crowded tufts ; leaves with very long hair-points ; 

 capsule scarcely emergent, spheric-oval. 



