Page:VCH Surrey 1.djvu/98

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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- 56