DICRANACE^.J 93 [Pleuridium. 



anomalous mosses. Without the fruit it bears much resemblance to Pleuridium 

 alternifolium with which it was confounded by the early botanists. Our species 

 is the only one found in Europe, but several closely allied forms occur in 

 N. America. 



2. PLEURIDIUM BRID. 



(Mant. muse. 10 (1819). ) 



Plants very small, often producing flagella. Leaves lanceolate and 

 lanceolate-subulate, nerved, glossy. Capsule cleistocarpous, on a short 

 pedicel, ovato-globose, with a short point, smooth, glossy. Calyptra 

 small, cucullate. Spores rather large, granular. Deriv. TrAev/uSiov at 

 the side. 



CLAVIS TO THE SPECIES. 



Perich. bracts like the leaves ; nerve narrow ; cells large, lax. axillare. 



Perich. bracts much longer than the leaves ; nerve broad ; cells small. 



Paroicous, perich. bracts lanceolate-subulate. subulatum. 



Autoicous, perich. bracts oval, suddenly narrowed to a long setaceous 

 point. altirnifottmn. 



i. PLEURIDIUM AXILLAEE (Dicks.) Lindb. 



Paroicous ; leaves and bracts narrowly lanceolate, acute, serrulate, 

 pale and glossy, laxly areolate ; nerve thin, vanishing below apex. 

 Capsule oval. (T. XIV, B.) 



Sw.Phascum axillare DICKS. Cr. fasc. I, 2, T. i, f. 3 (1785). SM. Eng. Bot. 1. 1036 (1802) ; Fl. 

 Brit, iii, 1149 (1804). TURN. Muse. hib. i (1804). WEB. MOHR Bot, Tasch. 63 (1807). 

 ROEHL. Ann. Wett. ges. i, 193 (1809), et Deutsch. Fl. iii, 35 (1812). LA PYL. J. Bot. 

 (1813). HOOK. TAYL. Muse. Brit. 7, t. 5 (1818). CASSEB. in Ann. Wett. ges. iv, 94 (1819). 

 GRAY Nat. arr. Br. pi. i, 711 (1821). HOOK. Fl. Scot. P. 2, 122 (1821) ; Br. Flora ii, 3 

 (1833). NEES HORNSCH. Bry. germ, i, 6i,t.6,f. 15 (1823). HuEBEN.Bry.germ.4 (1833). 

 BALS. DE NOT. Prod. Bry. mediol. 175 (1834). MACKAY Fl. hib. P. 2, p. 8 (1836). 

 DE NOT. Syll. muse. n. 401 (1838). 



Pkascum nitidum HEDW. Stirp. cr. i, 92, t. 34 (1787) ; Sp. muse. 19 (1801). TIMM Fl. meg. 

 n. 717 (1788). SCHRANK Bayers. Fl. ii, 434 (1789). WITH. Bot. arr. Br.Veg. 3 ed. iii, 

 787 (1796). HOFFM. Deutsch. Fl. ii, 20 (1796). Brid. Muse. rec. ii, P. i, 15 (1798) ; Sp. 

 muse. I, 6 (1806) ; Mant. 7 (1819) ; Bry. univ. i, 35 (1826). HULL Br. Fl. P. 2, 252 (1799). 

 SCHRAD. J. Bot. 1799, p. 55. ROTH Fl. germ, iii, P. i, 113 (1800). ROEHL. Moosg. 

 Deutsch. 24 (1800). P. BEAUV. Prodr. 82 (1805). ScHULTzFl. Starg. 272 (1806). SCHKUHR 

 Deutsch. Kr. gew. P. II, 4, t. i, f. i (1810). SCHWAEGR. Suppl. I, p. i, 7 (1811). MART. Fl. 

 cr. Erl. 126 (1817). BR. SCHIMP. Bry. eur. fasc. i, p. 12, t. 6 (1837). WILS. Bry. brit. 

 34, t. 5 (1855). HUSN. Mouss: nord-ouest 35 (1873). HOBK. Syn. Br. m. 30 (1873). 



Phase, curvicollum (non EHRH.) SWARTZ Sum. Veg. Scand. 38 (1814). HARTM. Skand. 

 Fl. i8 edd. (1820-61). 



Astomum nitidum HAMPE in Linnaea (1832). C. MUELL. Synops. i, 17 (1849). 

 Ephememm nitidum HAMPE in Reg. bot. Zeit. 1837, P I> 2 %5> 

 Astomum axillare HAMPE in Linnsa xii, 553 (1838). 

 Phase, stagninum WALLR. in Linnsea xiv, 680 (1840). 



