BOOKS, MSS., AND HERBARIA CONSULTED. 3 



■when they were last noticed. A star, *, prefixed to the Latin name indicates 

 that the species has probably been introduced into Middlesex at no very 

 remote period, but is now more or less completely naturalized. 



The native and naturalized (*) plants are treated in accordance with 

 the above plan, and are besides numbered consecutively throughout ; 

 but there are also many species noticed which are undoubtedly of exotic 

 origin, and, though introduced into our county, not naturalized in it. 

 These have no number prefixed, and do not enter into the Flora proper. 

 Their names are printed in ordinary type, they are treated less fully, and 

 the localities run on, each district not having a separate paragraph. 



Following the Systematic Catalogue are some lists and summaries which 

 explain themselves, and a comparison of the Middlesex Flora with that of 

 the whole of Great Britain, and of each of the surrounding counties. 



Signs and Abbeeviations, 



[ ]. Localities enclosed in square brackets are those in which the plant 

 is now certainly or very probably extinct. When the whole account of a 

 species i.= so enclosed it probably no longer inhabits the county. 



( ). Statements enclosed in round brackets are such as we have reason to 

 believe erroneous, or admitting of great doubt. It is thought better to 

 notice all such printed statements, taking care to distinguish them, than to 

 pass over them altogether, and so incur the charge of neglecting to become 

 acquainted with what has been already done in our field of observation. 



* Introduced, and more or less completely naturalized. (See above.) 



! After a locality means that the authors have either seen the plant growing 

 there, or received fresh-gathered specimens from the spot. 



V. s. means that a dried specimen has been seen by the authors, collected 

 in the locality indicated. 



A. Annual. 



B. BienniaL 

 P. Perennial. 



LIST OF BOOKS, MSS., AND HERBARIA CONSULTED 

 AND QUOTED IN THE 'FLORA.' 



[When there are two or more editions of a book, those not quoted are 

 within round brackets ( ).] 



Ann. and Mag. Nat. Hist. — The Annals and Magazine of Natural History, 

 1st series, 1841-47; 2nd series, 1848-57; 3rd series, 1858-67; 

 and 4th series, 1868, and in progress. [This is an amalgamation 

 and continuation of the new series of 3Iag. Nat. Hist. (q. v.) and 

 Anti. Nat. Hist., formerly Mag. of Zool. andBot.'] 



B. G. — The Botanist's Guide through England and Wales. By Dawson 

 Turner, F.R.S., and Lewis Weston Dillwyn, F.R.S. Lond. 1805. 



B 2 



