BOTANY 



THE LIVERWORTS (Hepatic*} 



The knowledge possessed at the present time of the liverworts or 

 scale mosses of Buckinghamshire is even more fragmentary than that 

 of the mosses ; like them, but to even a greater extent, they show 

 a preference for moist situations and a humid atmosphere. The 

 damp woods of the Colne and such places as the boggy parts of 

 Brickhill, Black Park, Alderbourne Bottom and Dropmore are places 

 where several species are found, but a systematic search in other parts of 

 the county would certainly result in adding fresh species to the county. 

 Among the more interesting species which have been found are Riccia 

 g/auca, Madotheca platyphylla and Radula complanata gathered by Mr. 

 Holmes near Buckingham ; and Mr. Benbow records Lejeunea minutis- 

 sima from Tilehouse and Stoke Wood, L. serpyllifolia from Brockhurst 

 Wood, Lepidozia reptans from the Denham and Chalfont Woods and at 

 Burnham Beeches, Blepharostoma trichophylla, Cepbalozia multiflora and C. 

 sphagnei, C. divaricata, y linger mannia venfricosa, Mylia T'ay/ori, M. anomala 

 and Gynocolea inflata from Stoke Common, C. sphagnei, M. Taylori and 

 M. anomala also occurring on Farnham Common. Plagiochila asplenioides 

 occurs near Lane End, Jungermannia ventricosa above Princes Risbor- 

 ough, Cepbalozia divaricata, Brickhill, C. bicuspidata, at Lane End, and 

 Madotheca platyphylla at Brickhill. 



THE LICHENS (Lichenes] 



The lichen flora of Buckinghamshire is practically an unworked 

 field, and although the county is not likely to be so rich as some of 

 those in the west of England, yet a large number of species are cer- 

 tainly found in it. But the absence of the primitive rocks and the 

 scarcity of rock surfaces, and the fact that so much of the woodlands 

 consist of beech whose smooth trunks and almost complete shade which 

 they cast are inimical to the growth of these organisms, necessarily tend 

 to limit the total number of the species, but some of the low-lying 

 woods in the Colne and Chess drainage as well as the older woods 

 in the Ouse district are happy hunting grounds. Nor must we omit 

 to mention what a charm is given so frequently to rural scenes by 

 the abundance of the golden lichen (Physcia parietina) on the brick-tiled 

 roofs of many a farm homestead or village barn. 



The following list has been given by Mr. E. M. Holmes all from 

 Buckingham except when otherwise stated. 



Collema pulposum, Ach. Tingewick Ramalina fastigiata, Ach. 



glaucescens, Hoffm. Bulstrode pollinaria, Ach. 

 Leptogium minutissimum, Koerb. Butlers evernioides, Nyl. 



Holt, Buckingham f. monophylla, Cromb. 



Cladonia sylvatica, Nyl. Farnham Royal Evernia prunastri, Ach. 



Ramalina calicaris, Nyl. Platysma diffusum, Nyl. Maidenhead, Stoke 



farinacea, Ach. Park 



f. phalerata, Ach. Stowe Park Parmelia perlata, Ach. 



fraxinea, Ach. exasperata, Ach. 



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