DicranacEjE.] 97 [Ditrichum. 



I. DITRICHUM TENUIFOLIUM {Schrad.) Lindb. 



Dioicous ; stem short ; leaves flexuoso-squarrose, sheathing at base, 

 subulate. Capsule on a slender pedicel, very narrowly cylindraceous, 

 lid conical. (T. XIV, E.) 



Syn. — Trichostomum tenuifoUum Schrad. Journ. Bot. ii, P. i, 58 (1799). 



Trichostomum cylindricum Hedw. Sp. muse. 107, t. 24, f. 7-13 (1801). Brid. Sp. muse. I, 

 230 (1806), Mant. 83 (iSig), Bryruniv. i, 491 {1826). Schkuhr Deutsch. Kr. Gew. 

 P. II, 79, t. 35 (1810). ScHWAEGR. Suppl. I, P. I, 142 (iSii). Wahlene. FI. lapp. 332 

 (1812). FuNCK Moost. 25, t. 16 (1821). 



Dicranum cylindricum Web. Mohr Bot. Tasch. 202 (1807). Roehl. Deutsch. FI. iii, 

 70 (1813). 



Didymodon cylindr. Wahlene. FI. suec. ii, 754 (1826). Sommerf. Suppl. FI. lapp. 52 

 (1826). Hartman Skand. FI. Hook. Br. FI. ii, 32 (1833). 



Ceratodon cylindr. Furnr. in Reg. bot. zeit. 1829, P. z, erg. 31. Br. Sch. Bry. eur. fasc. 

 29-30,1.3(1846). WiLs. Bry. Brit. 85, t. 39 (1855). Hartm. Skand. FI. 7 ed. FI. Dan. 

 Suppl. t. 114, f. 2. HoBK. Syn. Br. m. 49 (1873). 



Angstroemia cylindr. C. Muell. Synops. i, 441 (1849). 



Trichodon cylindr. Sohimp. Coroll. Br. eur. 36 (1856). Synops. 140 (i860), 2 ed. 138 (1876). 

 Berk. Handb. Br. m. 275 (1863). Milde Bry. Siles. 134. (1869). De Not. Epil. Briol. 

 ital. 570 (1869). 



Trichodon temdfolius LiNDB. Eur. Trich. 225 (1864). 



Ditrichum tenuifoUum LiNDB. Musci Scand 27 (1879). 



Dioicous ; gregarious or in small yellowish green tufts ; stem short, 

 slender, simple or but little divided. Leaves patent, flexuose, squarrose, 

 crisped when dry ; the lower small, ovato-subulate, upper lanceolate- 

 subulate, perich. bracts from a broad sheathing base, suddenly capillaceo- 

 subulate, the nerve broad, forming the whole upper part of subula, and 

 denticulate in the upper half; cells firm, narrow, elongated. Capsule 

 on a long very slender pale reddish seta, leptodermous, very narrowly 

 cylindraceous, slightly incurved in the middle, brown, erect or inclined ; 

 lid conic, rather obtuse, red ; annulus broad, revoluble ; teeth of per. 

 pale red, the legs long, filiform, rough. 



Male plant more slender, in distinct tufts ; perig. bracts con- 

 volute concave, subulate, antheridia numerous with slender paraphyses. 



Hab. — Fallow fields and wet sandy ground ; rare. Fr. 5 — 6. 



Castle Howard woods and Stockton forest, York (Spruce) ! ! Bowdon, Cheshire (Hunt 

 1868)!! Glen Prosen (Fergusson 1867)!! Ardingly and Tilgate, Sussex (Mitten). 

 Belfast (Drummond 1830). Lancashire and Derbyshire (Wilson). Fruit very rare. 



This species has been tossed about under various genera, but is clearly 

 at home in the present one ; it must be carefully discriminated from Dicmnella 

 crispa and Gnvillei which have similar leaves. 



Sect. 2. EUDITRICHUM Lindb. Plants slender, short or elongated. 

 Leaves divergent, subsecund or falcate, lanceolate-subulate. Capsule oval or 

 subcylindric. 



