A HISTORY OF BERKSHIRE 



Berks, as D. longifolia (D. intermedia) was probably mistaken for it ; 

 Chrysosplenium alternifolium, but the reported locality was on the Buck- 

 inghamshire side of the river at Cliveden, and the plant was possibly 

 C. oppositifolium ; Sedum Forsteri was a small form of the introduced 

 S. rejiexum ; Peucedanum officinale was probably Silaus pratensis it is 

 certainly an error ; Cicuta virosa, perhaps confused with Conium ; Rubia 

 peregrina possibly Asperula was mistaken for this plant, which is never 

 found so far inland. Cnicus heterophyllus the form of C. pratensis with 

 leaves more deeply cut was the plant seen ; Crepis paludosa this is not 

 found so far south in a native condition, forms of C. wrens being doubt- 

 less mistaken for it ; Melampyrum arvense, M. syhaticum and M. cristatum 

 probably all of these were forms of M. pratense, which is a variable 

 species ; Orobanche purpurea the purple flowered form of 0. Trifolium- 

 pratense (O. minor) was the plant seen ; Euphorbia platyphyllos has some 

 chance of being correct, it appears to be a decreasing species ; Allium 

 Scorodoprasum was only large A. vinea/e ; Habenaria albida was white 

 flowered H. conopsea ; Cephalanthera ensifotia, but probably a form of 

 C. pallens, which is a frequent plant of the beech woods of the Berkshire 

 downs, was mistaken for it ; Potamogeton gramineum (heterophyllus) was 

 probably a form of P. polygonifolius ; and Carex arenaria and C. CEderi, the 

 first being probably C. disticba, the latter a small form of C. flaw. 



In addition to the above there are also a few species which I have 

 been unable to discover in the reported stations, and respecting which 

 some mistake of identification may be suspected or the plant may have 

 been extirpated. They are Lathyrus palustris, recorded by Blackstone 

 from woods in the neighbourhood of Abingdon and possibly by Miller 

 from the neighbourhood of Windsor, and these may have been correct, 

 unless Lathyrus montanus, which does occur in these localities, was mis- 

 taken for the marsh pea ; Rosa pimpinellifolia, so far as the Wellington 

 College plant is concerned, is a form of the sweet brier, and the other 

 records have never been corroborated ; Pyrus scandica may be refound 

 unless a form of P. Aria was really observed instead of the plant we 

 now know as P. rotundifolia var. decipiens ; Tillcea muscosa may possibly 

 have been correctly named and be again found ; Antennaria dioica has 

 been found on the Oxfordshire Chilterns and we may expect it in Berks, 

 but if it occurs it must be very locally ; Arctium tomentosum possibly a 

 cottony form of A. minus may have been confused with it, but a plant so 

 named said to have been brought from Bagley Wood was at one time 

 cultivated in the Oxford Botanic Garden, but whether this is identical 

 with the Bagley Wood plant is not absolutely clear ; Filago gallica the 

 Buckinghamshire locality of Iver Heath was probably confused with 

 this county ; Ajuga Cbamcepitys occurs in Surrey, and so may reward 

 the searcher in this county ; Stacbys germanica an Oxfordshire locality 

 (Ducklington) was by mistake referred to Berkshire ; and Calamagrostis 

 lanceolata was probably C. efigeios, as the synonymy of these two species 

 was much confused, and Dr. Lightfoot's record for Windsor Park may 

 have meant C. epigeios, which still grows there. 



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