GRIMMIACE.E.] 8o [Orthotrichiim. 



Var. p. cylmdricnm Schimp. 



Plants larger. Caps, longer, more exactly cylindric, more exserted, with 

 8 longer bands of larger more coloured cells, 8 cilia more or less well 

 developed, teeth 8, imperfectly divided. Leaves longer, narrower, with a 

 stronger nerve. 



SYti.—Orthotrichum ar.omnlnm Sm. F1. brit. 1265, Eng. Bot. t. 2696. Turn. Muse. hib. 94. 



Hook. Tay. Muse. br. 72, t. 21. Hook. F1. scot. 137. Gray Arr. Br. pi. i, 745. Wils. 



Bry. brit. 177, t. 21. 

 Ortholrichum saxatile Schimp. Bry. eur. Suppl. fasc. 1—2, p 11. t. 10 (1864). Hobk. 



Syn. br. m. 94. Boulay F1. cr. de I'Est 620. HuSN. Mouss. N. ouest 106. 

 Orth. anomalnm p. saxatile Milde Bry. siles. 171. Venturi in Husn. muse. gall. 179. 

 Orth. anomalnm (3. cylindrhtim. Schimp. Synops. 2 ed. 308. 

 Orth. anomalnm ji. ciliafum Juratz. Laubm. oesterr.-ung. 213. 



Hab. — Limestone rocks and walls, not uncommon. 



Frequent in the Buxton and Craven districts. Ormeshead (Wilson). Lake district 

 (Whalley 1865). Castle Howard {Sprnce 184.1). Litton (Whitehead 1879) ! ! Sussex. 

 Devon (Holmes). Cheshire (Whitehead). tuUoch, Blair-Athol (Braithwaite 1887) ! ! 

 Bruton and Wilmcote, \\'arvvick (Bagnatl).- Ireland (Dr. Moore). Chapel-en-le-Frith 

 and Castleton, Derby (Holt 1882) ! ! 



There is no doubt that these two mosses only constitute a single species, 

 for the presence or amount of development of the intermediate bands is very 

 variable and affords no reliable character. Bridel tells us that he changed 

 the name anomalnm to saxatile, because there are other anomalous species ! 

 So much for Nature daring to offend the laws of humanity. I find no 

 mention of saxatile in Dr. Wood's paper cited by Schimper, and as that name 

 has been applied to both forms, it is also better to drop it altogether. See 

 also Dr. Wood's Supplemental notes in Phytologist V, 26 (1861). 



*** Peristome teeth papillose, without lamellae ; cilia smooth, 8 or 16. 



II. ORTHOTEICHUM RIVTJLAEE Turn. 



Autoicous ; blackish green, growing in vyater. Leaves oblong- 

 linguiform, obtuse, apiculate. Capsule immersed, pyriform with 8 broad 

 bands ; teeth reflexed when dry, cilia 8, filiform, often with 8 shorter 

 intermediate ones ; calyptra naked (T. LVII, B.) 



Syn. — Ortholrichum rivulare Turn. Muse. hib. 96, t. 8 (1804). Sm. F1. brit. 1266 (1804). Eng. 

 Bot. t. 2188. Brid. Sp. muse. H, 3 (1812), Mant. iii (i8ig), Bry. univ. i, 292 (1826). 

 ScHWAEG. Suppl. I, P. H, 31 (1816). Hook. Tayl. Muse. br. 75, t. 21 (1818). Gray 

 Nat. arr. br. pi. i, 747 (1821). Hook. F1. scot. P. 2, 137 (1821), Br. Fl. ii, 55 (1833). 

 Hook. Grev. Edin. J. Sci. i, 123 (1824). Hueben. Muse. germ. 375 {1833). Mack. 

 Fl. hib. P. ij, 30 (1836). Br. Sch. Bry. eur. fasc. 2 — 3, p. 25, t. 14 (1837). Rabenh. 

 Deutsch. kr. fl. ii, s. 3, 184 (1848). C. Muell. Synops. i, 699 (1849). WiLS. Bry. br. 

 183, t. 21 (1855). Schimp. Synops. 274 (i860), 2 ed. 338. Berk. Handb. br. m. 225 

 (1863). MiLDE Bry. siles. 177 (1869). Boulay Fl. cr. de I'Est 605 (1872). Hobk. 

 Syn. br. m. 93 (1873). Husn. Mouss. N. ouest 109 (1873). Lesq. James Moss. 

 N. Amer. 176 (1884). Venturi in Husn. Muse. gall. 176, t. 48 (1887). 



Autoicous ; in loose blackish-green tufts, floating or submersed. 

 Stems naked below, dichotomous and fasciculate branched, | — ij in. 



