A HISTORY OF SURREY 



7. EDEN. A small but interesting division, noteworthy from 

 possessing the only outcrop of Hastings Sand. The country is very 

 undulating with deep hollows and many little watercourses, besides large 

 ponds. The land northwards is flatter and of Weald Clay, with the Lower 

 Greensand and Chalk in the north. 



Polytrichum nanum, Neck. ; P. aloides, Hedw.; Physcomitrium sphaericum, Brid. Muddy edge 

 Archidium alternifolium, Schp. of a pond near Felbridge 



Pleuridium axillare, Ldb. Copthorne Common Brachythecium salebrosum, B. & S. ; B. illece- 



Rhacomitrium canescens, Brid. brum, De Not 



Tortula rigidula, Mitt. ; Barbula vinealis, Brid. Hypnum aduncum, var. Kneiffii, Schp. ; H. 



Weisia rostellata, Ldb. Dried mud of a pond uncinatum, Hedw. Felbridge, c. fr. 



near Felbridge H. imponens, Hedw. 



squarrosa, C. M. ; Orthotrichum tenellum, 

 Bruch. 



8. ARUN. Two small detached districts drained by two branches 

 of the Arun and lying respectively one to the south of Leith Hill, and 

 the other to the south-east of Hind Head. 



Orthotrichum Lyellii, H. & T. ; Neckera Eurhynchium myosuroides, Shp. ; Plagio- 



pumila, var Philippeana, Milde. thecium sylvaticum, B. & S. 



Brachythecium illecebrum, Dixon 



CHARACE^ 



This somewhat obscure group of water plants had received but 

 little attention until the publication of Messrs. Groves' monograph led to 

 a more general study of the order. The London Catalogue of British Plants 

 (1895) enumerates 28 species, a number which has since been slightly 

 increased. Eleven of these are found in Surrey. The most widely dis- 

 tributed and, I think, the commonest Chara is C. vu/garis, which occurs 

 in all of the districts, while C.fragilis is so far recorded from eight. C. 

 aspera and C. hispida are each of them found in three. The rarest species, 

 C. contraria, has been noted in two districts ; it has been gathered in the 

 pool by the Thames below Walton bridge, and in Fetcham Mill pond 

 (C. E. Salmon). Lycbnotbamnus stelliger was discovered in the above- 

 mentioned pool by Walton bridge (H. & J. Groves) some years ago ; no 

 other locality is known for it in the county. 'Tolypella intricata is con- 

 fined to the neighbourhood of Egham, where it has occurred in several 

 ditches. The commoner species T. glomerata, which grows on the 

 opposite side of the Thames, near Staines, has not yet been detected. Of 

 the genus Nitella the commonest is N. opaca, found in nine districts, but 

 not yet noted in the Bourne Brook basin, where it doubtless occurs. N. 

 flexilis and N. translucent are each found in six districts. There remains 

 N. gracitis, a few fragments of which occurred mixed with a gathering 

 of Chara fragilis collected near Kingston (G. Nicholson). Although 

 including a few interesting species such as, more particularly, Lycb- 



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