318 THE BOTANICAL EXCHANGE CLUB OP THE BRITISH ISLES. 



thuringiaca by Dr Wolf. (2) P. aurea L., for the occurrence of 

 which (see Gray Nat. Arr. ii., 582) there seems no satisfactory 

 evidence. (3) P. collina Wibel (see Dunn Alien Flora 71), which is 

 almost certainly wrongly identified ; indeed it is not a species but 

 rather a group of plants which is only quoted in synonymy by Wolf. 

 P. inclinata Vill. (Dunn. I.e., p. 72) appears to be identical with the 

 var. canescens Ruprecht (not of Besser), and Dr Wolf has so identified 

 my Berkshire plant. P. alba L., and P. tridentata Aiton, the latter 

 one of Don's plants, can scarcely be included as numbered species 

 until confirmatory evidence of their occurrence in Britain has been 

 obtained. 



Potentilla argentea L. After nearly a century I found this 

 species in Sibthorp's locality on Henley Park Hill, Oxfordshire. It 

 has recently re-appeared in considerable quantity near Besilsleigh, 

 Berks, where for a long time unsuccessful search had been made. 



var. decumbens (Jord.). Near Croydon, Surrey, 1863, A. Bennett. 



var. tenuiloba (Jord.). Woolwich Arsenal, Kent, 1894, E. S. 

 Marshall. 



forma angustisecta Wolf. Newhaven, Sussex, 1909, Druce. 



P. recta L., var. sulphurea Lam. & DC. Labelled pyrenaica. 

 Site of old garden, Tunbridge Wells, 1906, Dr Gilbert, "is probably 

 this." Waste ground, Oxford, 1890, Druce. 



var. obscura (Willd.) Koch. Edenbridge, Kent, as P. hirta, 

 Rev. D.Smith; Pyrford, Surrey, 1911, Lady Davy, waste ground, 

 Iffley Road, Oxford, 1890, Druce. 



P. hirta L., var. pedata Koch. Llanfairfechan, Druce. 



P. norvegica L. Woolwich Arsenal, Kent, 1892, Wolley Dod; 

 Aldershot, N. Hants, 1911, F. Gibson; Carshal ton, C. E. Palmer; 

 Pyrford, Druce; Thorp Lee, 1897, F. Shepherd; Richmond, Surrey, 

 Loydell; Hanwell, Middlesex, Loydell ; Blackwater, Berks, 1892, 

 Druce; Woodwalton, Hunts, Druce; Arnley, Leeds, 1877, W. West. 



P. intermedia L. Waste ground, Finchley, sent by Dr Drabble 

 as norvegica to the Bot. Exch. Club in 1909, and there correctly 

 named by Mr J. W. White and Dr Bucknall, P. intermedia. As P. 

 norvegica, Newhaven Station, Sussex, 1906, T. Hilton, where I also 

 gathered it in 1909; Forfar, 1910, R. and M. Corstorphine ; and 

 the P. opaca of George Don localised " Rocks, West of Clova," Lady 

 Aylesford's collection. The specimens of Don's have " petalis paulo 



