NOTES ON MR. DUNN’S ‘ALIEN FLORA’ 91 
I would suggest that the idea of “introduction” or “ non-indi- 
geneity ” should be reserved for the occurrence of plants which are 
either not native in the country, ms not native in the immediate 
vicinity, or which have been carried by human agency. This 
a : : 
Crepis taraxacifolia; it would not cover, and I think should not 
cover, distribution of plants by bird agency and the like. Much of 
all this ma ng be applied, mutatis mutandis, to other species italicized 
further consideration, of which I have anwar doubt. It is in- 
tended to serve as an introduction to a few notes, relating py 
- Re RENEE: plants. They follow the order of the 
Clematis Vitalba L. Should n Seis be ota from the List ? 
Surely it is native in the localities on the chalk and various lime- 
stone formations of the Midlands, Giashorgan; and other counties 
ay ens - Top. Bot. ed. — é, in the south half of England. 
great venariis of its localities it is undoubtedly native. Ton 
falls in with H. C. Watson’s view (see ye Brit. i. 70, and T 
unculus repens L. Native and luxuriant i in damp meadows, 
marshes, &e., of Glam morgan ; no less native, though less luxuriant 
be 
adapting itself to a large variety of cheng agemoree “at holds a 
Brassica nigra Koch. “ awe ably non- “3 saree per List. 
Yet H. C. geome (Top. Bot.), Druce (Fl. Berks and Oxon), 
Townsend (Fl. Hants), Murra ay (Fl. Som merset), orion and Mar- 
“ native,” e.g. on ver- banks: s, sea cliffs, &e. It oceursin Glamor, 
in some phaasdanisie on the top of the lias cliffs near Llantwit Major 
and on Nash Point, in situations and in associations which confirm 
the above opinions, formed as the ey are on a wide knowledge of field 
botany. Within my experience, it is particularly a _— of river- 
,» and is, I believe, very plentiful in some parts by the 
poets and its tributaries. I a no doubt it is truly native in 
Shaws oleracea L. Thig I cannot doubt i is truly indigenous. 
It grows in great profusion for miles along the face of the lias cliffs 
on the Glamorgan coast, associated with Limonium occidentale, 
Carduus eriophorus, and the like. 
Draba aizoides L, I long had doubts of this species; but oft- 
H 2 
