Fam. II. SCHISTOSTEGACE^. 



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

 confervoid protonema, simple, rooting only at base ; fertile stems 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 rhom- 

 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. (txi-<tto>s cleft, a-T^y-q a 

 lid, applied in error. 



SCHISTOSTEGA OSMUNDACEA {Dichs.) Mohr. 

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



Syn. — Milium osmimdaceum Dicks. Cr. Fasc. I, 3, t. i, fig. 4 (1785). 



Dicksonia pusilla Ehrh. PI. crypt, u. 65 (1786). 



Gymnostomum pennntum Hedw. Muse. fr. i, 78, t. 2g (1787), Sp. muse. 31 (1801). Brid. 

 Muse. ree. II, P. I, 43 (1798), Sp. muse. I, 34 (i8o5), 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). ScHWAEQR. Suppl. I, P. I, 19 (1811). Mart. Fl. er. 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). 



Gymnostommn osmimdaceum Hoffm. Deutseh. fl. ii, 28 (1796). Sm. Fl. brit. iii, 1161 

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



Sckistostcga osmundacea Mohr Obs. bot. 26 (1803). Web. Mohr Bot. Tasch. 92, t. 6, 

 f. 9, 1807). Roehl. Deutseh. fl. iii, 41 (1813). Sturm Deutseh. fl. cr. 2, n. 12 (1812). 

 FuNCK Moost. 8, t. 6 (1821). Nees Hornsch. Bry. germ, i, 108, t. g, f. i (1823). 

 Brid. Bry. univ., i, no (1826). Hueben. Muse. germ. 65 (1833). Br. Sch. 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. i6i, t. 14 (1863). De Not. Epil. bri. ital. 726 (1869). Milde 



