GRIMMIACE.E.] 75 [Orthotrichum. 



pedicel, contracted slightly below the mouth, stomata superficial ; 

 peristome of 16 teeth with a strongly marked divisural line and short 

 articulations, transversely striolate, densely papillose, pale yellow, 

 opake, when dry circularly revolute but not touching the caps, wall 

 except with the points, endostome of 16 cilia, erect, broad, erose at 

 margins, yellowish, papillose, of two rows of cells; lid conic elongate, 

 red at margin ; calyptra conic, straw-coloured with a dark tip and 

 many yellow hairs ; annulus double persistent. Male infl. gemmiform, 

 lateral axillar. 



HAB. On trees, not uncommon. Fr. 4 5. 



Linnaeus assigns the following character to his Bryum striatum, " antheris 

 sessilibus sparsis, calyptris striatis sursum pilosis," and it is evident his 

 name referred to the calyptra and not to the capsule, as was assumed by 

 Schimper and his followers, and therefore in our opinion the name striatum 

 must be retained. The species may be known from 0. affine by its smaller 

 size, dense leaves, smooth capsule and 16 cilia. 



7. ORTHOTRICHUM LYELLII. Hook. Tayl. 



Dioicous ; in tall lax tufts. Leaves patent and recurved, longly 



lane., acute, bearing rufous, clavate gemmae. Caps, oval-oblong, 



striate, decurrent in a longish neck ; teeth 16, pale, revolute, cilia 16, 



broad, appendiculate. (T. LVI, B.) 



SYV.Orthotrichum Lyellii HOOK. TAYL. Muse. brit. 76, t. 22 (1818). GREV. in Mem. Wern. 

 soc. iii, 355. HOOK. GREV. Edin. Journ. Sc. i, 124 (1824). GRAY Nat. arr. br. pi. i, 

 747 (1821). BRID. Bry. univ. i, 295 (1826). HOOK. Fl. Scot. P. II, 137 (1821), Br. fl. 

 ii, 55 -(1833). HUEBEN. Muse. germ. 373 (1833). BR. SCH. Bry. eur. fasc. 2 3, p. 27, t. 16 

 (1837). RABENH. Deutsch. kr. fl. ii, S. 3, 186 (1848). C. MUELL. Synops. i, 709 (1849). 

 HAMMAR Mon. Orthot. suec. 15 (1852). WILS. Bry. br. 183, t. 22 (1855), Eng. Bot. 

 1.2834. SCHIMP. Synops. 279 (1860), 2 ed. 336. BERK. Handb. br. m. 227 (1863). 

 MILDE Bry. siles. 180 (1869). DE NOT. Epil. bri. ital. 318 (1869). BOULAY Fl. cr. de 

 1'Est 602 (1872). HOBK. Syn. br. m. 92 (1873). HUSN. Mouss. nord-ouest no (1873). 

 JURATZ. Laubm. oesterr.-ung. 199 (1882). LESQ. JAMES Moss. N. Amer. 177 (1884). 

 VENTURI in Muse. gall. 166, t. 46 (1887). 



Dioicous; in large lax tufts i 4 in. high, dull yellowish-green 

 above, fuscous and naked at base, the stems with subarcuate branches, 

 soft, erect or ascending. Leaves incumbent and spreading when dry, 

 strongly patent and recurved when moist, undulate at margin, from an 

 oblong base very longly lane., narrow, acute, the margin recurved above 

 the base, plane in all the rest of the leaf, the surface bearing many 

 rufous septate, clavate or branched protonemal processes ; nerve 

 vanishing in the point, which is sometimes slightly toothed ; cells at 

 base smooth, elongated, subflexuose, above small rounded or suboval, 



