the
continent. But much attention has of late years been paid to the critical
examination of British plants in comparison with continental specimens, and
I am now enabled to give a much more {360} extensive list of the species or
forms which at present seem to be peculiar. For the following list I am
primarily indebted to Mr. Arthur Bennett of Croydon. Sir Joseph Hooker has
been so kind as to examine it carefully and to give me his conclusions on
the relative value of the differences of the several forms, and Mr. Baker,
of Kew, has also assisted with his extensive knowledge of British plants.

LIST OF SPECIES, SUB-SPECIES, AND VARIETIES OF FLOWERING PLANTS FOUND
IN GREAT BRITAIN OR IRELAND, BUT NOT AT PRESENT KNOWN IN CONTINENTAL
EUROPE. BY ARTHUR BENNETT, F.L.S. THE MOST DISTINCT AND BEST DETERMINED
FORMS ARE MARKED WITH AN ASTERISK.

1. *Caltha radicans (Forst.). "A much disputed species, or form of _C.
palustris_. It is a relatively rare plant." (J. D. H.) "Certainly
distinct from the Scandinavian form." (Ar. Bennett.)

2. *Arabis petraea (Lam.) _var._ grandifolia (Druce). Scotch mountains.
"The larger flowers alone distinguish this." (J. D. H.)

3. Arabis ciliata (R. Br.). In Nyman's _Conspectus Florae Europaeae_
this species is given as found in England and Ireland only. "A very
much disputed form of a plant of very wide distribution in Europe and
North America." (J. D. H.)

4. Brassica monensis (Huds.). "This and the continental _B.
cheiranthus_ (also found in Cornwall) are barely distinguishable from
one another." (J. D. H.)

5. Diplotaxis muralis (D. C.) _var._ Babingtonii (Syme). South of
England. "A biennial or perennial form; considered to be a denizen by
Watson." (J. D. H.)

6. *Helianthemum guttatum (Mill), _var._ Breweri (Planch). Anglesea.
"Very doubtful local plant. _H. guttatum_ (true) has lately been found
in the same locality." (J. D. H.)

7. *Polygala vulgaris (L.), _var._ grandiflora (Bab). Sligo, Ireland.
"A very distinct variety." (J. D. H.)

8. Viola lutea (Huds.), _var._ amoena (Symons). "_V. lutea_ itself is
considered to be a form of _V. tricolor_, and _V. amoena_ the better
coloured of the two forms of _V. lutea_." (J. D. H.)

9. *Cerastium arcticum (Lange), _var._ Edmonstonii (Beeby). Shetland
Is. "But _C. arcticum_ is referable to the very variable _C. alpinum_."