GRIMMIACE^E.] 82 [Orthotrichum. 



Autoicous ; in dark lurid green, sparingly branched tufts. Leaves 

 soft and succulent, rather distant, erect and loosely imbricated when 

 dry, erecto-patent when moist, obovate-spathulate, rounded at point 

 and muticous, the upper with a very small apiculus, revolute at margin 

 at the base, and then recurved to some distance below the summit ; cells 

 at base quadrangular, elongated next the nerve, passing gradually up into 

 large rounded or angular, smooth or faintly papillose ones, nerve slender, 

 lost below point. Perich. bracts longer, narrower, sulcate, with a shorter 

 nerve, sometimes with a long piliform point. Caps, immersed, soft, pale, 

 fuscous when old, oval pyriform, with a long sulcate neck, broadly 

 8-striate, stomata immersed ; annulus of two rows of compressed cells, 

 teeth 8, bigeminate, yellowish, reflexed when dry, densely and finely 

 papillose, cilia 8, shorter than the teeth, yellow and finely papillose, 

 sometimes 16; lid conic, rostellate. Calyptra companulate, greyish 

 green, naked smooth, apex and edges of the plaits reddish. Male infl. 

 gemmiform, bracts cucullato-incurved at apex. 



HAB. Trunks and roots of trees on river banks. Fr. 5 6. 



Banks of the Ouse, near York, and of the Wharfe, and by the Cock, Tadcaster (Spruce 

 1842) ! ! Scotland by the Clyde (Drummond 1824). By the Thames, Wandsworth 

 (Sowerby). Stapleton, near Bristol (Thwaites 1843) ! ! Henfield, Sussex (Mitten 

 1844) ! Near Temple Mill, Twycross (Bloxam 1844) ! ! By the Girvan, Dailly 

 (Dr. Wood). Ilkley (Carrington). Kilvington and Mickley, Yorks. (Baker 1852) ! 

 Thirsk (Davies). Dalam Tower park (Berkeley 1869). Castle Howard (Slater) ! ! 

 Drumbridge, Down (J. H. Dames 1878). Birnam (Carrington 1857). Ross Bay 

 (Carrington 1861). 



A very distinct species and scarcely found out of the kingdom. It may 

 be readily known by its distant soft leaves with large cells and dingy lurid 

 colour ; unfortunately it is commonly impregnated with n?ud, and does not 

 make elegant herbarium specimens. Few of the North Yorkshire streams 

 are without this and the preceding species. 



13. ORTHOTRICHUM STRAMINEUM Hornsch. 



Autoicous; in small loose tufts. Leaves lanceolate, carinate, 

 acuminate. Caps, oblong-pyriform, emergent, with 8 broad striae, 

 vaginula hairy; cilia 8 or 16 ; calyptra campanulate yellow, slightly 

 hairy. (T. LVII, D.) 



SvN.Polytrichum Bryi ruralis facie, capsulis sessilibus minus DILLEN. Hist, muse, 431, t ss, 



fig. 9 (1741), et Herb. 



Orthotrichum stramineum HORNSCH. in BRID. Bry. univ. i, 789 (1827). WALLR. Fl. cr. 

 germ, i, 210 (1831). HUEBEN. Muse. germ. 363 (1833). BR. SCH. Bry. eur. fasc. 23, 

 p. 24, t. 13 (1837). RABENH. Deutsch. Kr. fl. ii, S. 3, 184 (1848). C. MUELL. 

 Synops. i, 697 (1849). HARTM. Skand. fl. 5 ed. 367 (1849). HAMMAR Mon. Orth. suec. 

 12 (1852). WILS. Bry. br. 180, t. 45 (1855). SCHIMP. Synops. 272 (1860), 2 ed. 32-5. 

 BERK. Handb. br. m. 224 (1863). MILDE Bry. siles. 176 (1869). DE NOT. Epil. bri. 



