COMMON PLANTS. oli 
common or what arerare plants. We submit the lists to our cor- 
respondents, with the hope that they will corroborate or modify 
our positions. We may have omitted plants that are common 
in some places, and we may have entered plants that are rare in 
other parts, of which we have no accounts. We beg our readers 
to deduct, first, all maritime species, as not coming under our 
category of common things; secondly, all alpine plants, as ex- 
eluded on the same ground. Then if any of what we call com- 
mon plants are absent or rare in their districts, we hope they 
will tell us; and secondly, that if any of the excluded species 
be common with them, we expect they will inform us to what 
extent these are so. There are two tests of commonness :— 
Ist, whole tracts of gregarious species sometimes separated by 
distant intervals; 2nd, numerous individuals and frequency of 
oceurrence. Where neither of these characters can be applied, 
we deem the species rare, and request information accordingly, 
viz. where the individuals are few and their occurrence infre- 
quent, we say the species is rare. 
The authorities from which this list of common species has 
been compiled are the following :—Flora Devoniensis (Jones and 
Kingston), together with the various additions supplied by bota- 
nists since 1829, and published either separately or in the ‘ Phy- 
tologist.’ .A portion of a Flora of Hampshire, by Dr. Bromfield 
(see ‘ Phytologist,’ O.S.) A Flora of Godalming, Surrey, by Mr. 
Salmon. A Flora of Surrey, by the same, inedit. A MS. Flora 
of Guildford, penes me. The same of Hampstead. A portion of 
a Flora of Croydon, Surrey, penes me. Luxford’s Reigate Flora. 
Purton’s Midland Flora. Walker’s Flora of Oxfordshire. Ab- 
bott’s Flora Bedfordiensis. Relhan’s Flora Cantabrigiensis. 
Leighton’s Flora of Shropshire. Webb and Coleman’s Flora 
Hertfordiensis. Hall’s Flora of Liverpool. Davies’s Welsh Bo- 
tanology. Baker’s Flora of Yorkshire (Supplement to Baines’s 
Flora; this contains all the Yorkshire plants). Jobnston’s Flora 
of Berwick-on-Tweed. Greville’s Flora Edinensis. Hopkirk’s 
Flora Glottiana. Gardiner’s Flora of Forfar. Murray’s Northern 
Flora. Dickie’s and Macgillivray’s Lists of Aberdeen Plants 
(Flora Abredonensis). The English Flora of Smith. The 
British Flora of Hooker and Arnott. Babington’s Manual of 
British Plants, ete. etc. 
