Fam. ii. SCHISTOSTEGACE.E. 



Plants very small and slender, of two forms, with persistent branching 

 confervoid protonema, simple, rooting only at base ; fertile steins naked 

 below, frondiform, with the leaves bifarious, inserted vertically and con- 

 fluent at base, or only with a terminal rosette of smaller leaves, inserted 

 horizontally and quinquefarious, sterile stems larger, frondiform. Leaves 

 all nerveless, plane, oval-rhomboid, with lax prosenchymatous rhorn- 

 boidal cells. Capsule minute, globose-oval, exannulate, gymnostomous. 

 Calyptra cylindrico-conical, minute, fugacious. Lid convex. Inhabits 

 dark holes and caverns. 



SCHISTOSTEGA Mohr. 



Obs. botan. 26 (1803). 



Plants small, slender, naked below. Leaves dimorphous, bifarious 

 and inserted vertically or smaller and comant, inserted horizontally, 

 lanceolate, nerveless, laxly areolate. Capsule minute, globose, gymnos- 

 tomous ; calyptra minute, conical, dimidiate. Der. o^io-ros cleft, o-rcy// a 

 lid, applied in error. 



SCHISTOSTEGA OSMUNDACEA (Dicks.) Mohr. 

 The only species of the genus. (T. LX.) 



SYN. Mninm osmundacenm DICKS. Cr. Fasc. I, 3, t. i, fig. 4 (1785). 

 Dicksonia fusilla EHRH. PI. crypt, n. 65 (1786). 



Gymnostomnm peiir.ntum HEDW. Muse. fr. i, 78, t. 29 (1787), Sp. muse. 31 (1801). BRID. 

 "Muse. rec. II, P. 1,43 (1798), Sp. muse. 1,34 (1806,), Mant. muse. 16 (1819). ROTH 

 Fl. germ, iii, P. I, 128 (1800). ROEHL. Moosg. deutsch. 84 (1800), Ann. Wett. ges. II, 

 133. SPRENG. Enleit. 269 (1804). P. BEAUV. 59 (1805). SCHKUHR Deutsch. kr. gew. 

 P. II, 31, t. 12 (1810). SCHWAEGR. Suppl. I, P. I, 19 (1811). MART. Fl. cr. Erl. 124 

 (1817). 



Bryum pennatum GMEL. (L.) Syst. nat. ii, 135 (1791). LAICH. PI. eur. 482 (1794). WITH. 



Bot. arr. br. veg. 3 ed. iii, 821 (1796). HULL Br. fl. P. 2, 239 (1799). 

 Gymnostomum osmimdaceum HOFFM. Deutsch. fl. ii, 28 (1796). SM. Fl. brit. iii, 1161 



(1804), Eng- Bot. t. 2213. 

 Schistostega osmundacea MOHR Obs. bot. 26 (1803). WEB. MOHR Bot. Tasch. 92, t. 6, 



f. 9, 1807). ROEHL. Deutsch. fl. iii, 41 (1813). STURM Deutsch. fl. cr. 2, n. 12 (1812). 



FUNCK Moost. 8, t. 6 (1821). NEES HORNSCH. Bry. germ, i, 108, t. 9, f. i (1823). 



BRID. Bry. univ., i, no (1826). HUEBEN. Muse. germ. 65 (1833). BR. Sen. Bry. eur. 



fasc. 17 (1843). RABENH. Deutsch. kr. fl. ii, S. 3, 306 (1848). C. MUELL. Synops. i, 38 



(1849). WILS. Bry. brit. 300, t. 8 (1855). SCHIMP. Synops. 293 (1160), 2 ed. 352. 



BERK. Handb. Br. m. 161, t. 14 (1863). DE NOT. Epil. bri. ital. 726 (1869). MILDE 



