BOTANY 



fore indicative of pure and moist air. In the eastern counties of England, 

 where the atmosphere is drier, they are by no means so numerous as in 

 the moister air of the western and southern counties. 



Surrey is probably rich in species growing in woodlands and on 

 walls, in those found on heaths and on flint stones and chalk, but as the 

 students of lichenology in this county have been extremely few and their 

 researches have been confined to a very few localities, chiefly the tract 

 of country between Guildford and Dorking and the neighbourhood of 

 Esher, the number of species recorded is comparatively small. Never- 

 theless a few rare species have been met with. Of these may be 

 mentioned Lecidea spododes and L. Ntege/ii, found by Dr. Capron at 

 Shiere ; L. lubens, found by the Rev. J. M. Crombie at Shiere ; also 

 Verrucaria sfarsu/a, found by Mr. W. Joshua at Dorking, the last three 

 not having been found recorded from elsewhere in Great Britain, al- 

 though L. Nagelii has also been found in Ireland. There are thus two 

 species apparently peculiar to Surrey, although it is of course possible they 

 may subsequently be found in other counties. Another very rare species 

 also found by Dr. Capron at Shiere is Opegrapha prosodea, which has also 

 been recorded from Jersey, but from nowhere else in Britain than in 

 Surrey. The list of lichens hitherto found in the county is nevertheless 

 a very small one : but as it is somewhat mixed in character, containing 

 some comparatively rare and other very common species, whilst a large 

 number of common species have never been recorded that would almost 

 certainly reward a careful search, a full list is here given, so far as county 

 records are obtainable. 



The most recent work on British lichens, by the Rev. J. M. 

 Crombie, being incomplete, the previous work, by the Rev. W. A. 

 Leigh ton, The Lichen Flora of Great Britain (3rd edit.), has been 

 followed both as to classification and nomenclature except in those cases 

 in which new species have been discovered since Leighton's work was 

 published. In such cases Crombie's work has been followed. My own 

 initials are only given after species not mentioned in either of these works 

 as occurring in Surrey, and are therefore more recent records. The 

 initials 'J. M. C.' indicate that the species are mentioned in his work 

 without the name of the finder, but the specimens have not necessarily 

 been found by himself, the list of localities given in his work referring 

 to specimens in the Cryptogamic Herbarium of the British Museum. 

 The initials ' W. B.' refer to William Borrer late of Henfield ; < W. J.' 

 to William Joshua late of Cirencester ; and ' E. C.' to Dr. E. Capron 

 of Shiere. 



COLLEMACEI (Jelly Lichens) COLLKMEI (continued) 



COLLEMEI Collema limosum, Ach. Croydon (E. M. H.) 



Collema pulposum, Bernh. Reigate granuliferum, Nyl. Headley Lane 



(J. M. C.) (E. M. H.) 



var. ceranoides, Borr. Shiere Leptogium microphyllum, Ach. Ockley 



(J. M. C.) Green (W. B.) 



var. tenax, Ach. Reigate (J. M. C.) cretaceum, Sm. Reigate (W. J.) 



61 



