. [October, 1858.] 569 



ON THE ORTHOTEICHE^ OF YORKSHIRE. 

 By B. Carrington, M.D.Ed., Fel. Bot. Soc.Ed., etc. 



(mt/i a Plate*) 



No tract of country of equal extent in Britain can boast of so 

 many Orthotricha as Yorkshire. Indeed, with the exception of 

 O. speciosum and O. Ludwigii, all those which have been recorded 

 as British are found within the limits of the county. The species 

 delight in wooded valleys and the neighbourhood of streams 

 impregnated with salts of lime ; and where shall we find lovelier 

 valleys than occur between Teesdale and Airedale, or purer streams 

 than those which rising in the Pennine chain unite in the great 

 vale of York ? Nor are they less abundant amongst the oolitic 

 moorlands watered by the Esk and Derwent. But although 

 plentiful in the North Riding, and upper half of the West Riding, 

 south of the Craven fault, where the grits and sandstones of the 

 coal measures preponderate, scarcely a single specimen can be 

 met with. It is chiefly to the new species that I would direct 

 attention, and especially to those like 0. tenellum and 0. pallens, 

 which are liable to be mistaken for small states of O, ajffine. 

 The stations for the rarer species are taken from an examination 

 of Mr. Baker's collection, and my own observations. I have 

 also to thank Mr. J. H. Davies and Mr. Nowell for their kind- 

 ness in sending me specimens. 



The history of some species is yet far from perfect, and I shall 

 be thankful to readers of the ' Phytologist ' for specimens, or 

 observations bearing on disputed points. The species should be 

 compared in their places of growth, and their habit and time of 

 maturation noted. f 



ANALYSIS OF SPECIES. 



A. Pedicel generally shorter than the capsules. Leaves gradually 

 tapering from the base, not contorted when dry, margins reflexed ; 

 papillose. Ochrea distinct. Monoicous except 7 and 13. — Orthotri- 

 chum, Bry. Eur. Consp. 



* Peristome single, not rejlexed when dry. 



1. 0. anomalum, Hedw. Whole plant rufous ; capsule quite 



* For explanation of Figm-es, see p. 575. 



t For a more detailed account of the Order, see Trans. Ed. Bot. Soc,, Aug. 1848. 

 N, S. VOL. II. 4 D 



