ToRTULACEiE.l 207 [Tortula. 



I. TORTULA PUSILLA [Hed.) Mitt. 



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

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



Syn. — Bryum pusillum Hedw. Fund. muse. II, 32 (1782). Relh. FJ. cant. 404 (1785). 

 Laich. pi. eur. 484 (1794). With. Bot. arr. br. veg. 3 ed. iii, 811 (1796). Abbot F1. 

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

 Gyinnostonium pusillum Hedw. op. c. 87. 



Gyinn. 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). Scheank Baiers. fl. ii, 438 (1789). 

 SiBTH. Fl. oxon. 272 (1794). HoFFM. Deutseh. 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. deutseh. 15 (1800), Ann. wett. gas. i, 121, 

 Deutseh. 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 (i8o5). Web. 

 MoHR Bot. Taseh. 80 (1807). Schkuhr Deutseh. kr. gew. P. II, 20, t. g (1810). 

 ScHWAEG. Suppl. I, P. I, 79 (181 1). Voit Musc. herb. 15 (1812). Wahlenb. Fl. carp. 

 334 (1814) ; Fl. ups. 390 (1820). Mart. Fl. cr. erl. 420 (1817). Hook. Tayl. Musc. br. 

 II, t. 7 (1818). Hartm. Skand. fl. 383 (1820). Funck Moost. 5, t. 4 (1821). Hook. 

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

 Zenk. Dietr. Muse. thur. II, u. 47 (1822). Nees Hornsch. Bry. germ, i, 128, t. 9, f. 

 5 (1823). Hueeen. Muse. germ. 36 (1833). Mack. Fl. hib. P. 2, 10 (1836). De Not. 

 Syll. 284 (1838). 



Pottia cavifoUa Ehrh. Beitr. i, 187 (1787). KuNZE Deutseh. er. gew. 20 (1795). Br. 

 SCH. Bry. eur. f. 18 — 20, p. 7, t. 2 (1843). C. Muell. Synops. i, 550 (1849). Rabenh. 

 Deutseh. kr. fl. ii, s. 3, 96 (1848). Wils. Bry. br. 92, t. 7 (1855). Schimp. Syn. 122 

 (i86o), 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. loi (1884). 



Bryum ovatuni 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. Soe. Bot. xii, 165 (1869). 



Pterigoneurum cavifoUum Juratz. Laubm. oester.-ung. g5 (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. suhsessilis (Brid.) is found in central 

 Europe. 



Var. p. incana [Nees Hornsch.) 



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

 capsule scarcely emergent, spheric-oval. 



