ALIEN FLORA OF BRITAIN 189 
and formulating his theory, and in the body of the work dealing 
with plants in detail. Both lists include not only aliens, but also 
many native ae which are often recorded from other than 
DENars! localitie 
mining the status of s was in itself most wee and 
Mr. Dunn has foreseen the danger of applying a form fe) 
rigidly to every case, though it is open to question a he 
u 
might not with advantage have held to it still more loosely in 
detail. His successors will, however, profit greatly by his work, 
even _— they modify it. 
As compared with the Preliminary List, some clear improve- 
ments may be noted in the present book. Lschscholtzia californica, 
first treated se oT native, is, of course, now placed among 
aliens. Of species which are now rightly omitted altogether, it is 
enough to see ‘Clematis Vitalba, Ranunculus repens, Draba muralis, 
Nasturtium sylvestre, Arenaria serpyllifolia, Tunica prolifera, Frankenia 
uonymus europeus, Vicia So ies al wig ss and Cracca, 
Anthemis nobilis, Cnicus ertophor o one wo require an 
explanation for the omission of aoe from the Alien List; yet 
they all appeared at first as only ‘“ probably natives.” The change 
of opinion which led to the following “Aliens” of the Felina 
List being altogether omitted now is still - appier, viz. :—Drab 
ie Seated teseda: oy gait ee ag Lychnis Visearia, 
no one would miss, say, Aster Linosy see Galeopsis Ladanum, Brassica 
nigra and oleracea: and very few d ask after Barbarea stricta, 
Lavatera arborea, Vicia lutea and haa, Marrubium, Nepeta Cataria, 
saat See peng: if they were absent. 
Some other he differences hakiniboh the two lists are a easy 
to ‘edad... ‘le is, perhaps, simply an oversight that, eg. 2 
riticum vulgare no longer nds a place among aliens; at case 
like those of Aconitum Napellus and Verbena officinalis, both ar 
for the first time treated as no better than aliens, look strange 
_ Carex brizoides, Doronicum fee, and Pardalianches, 
ch are adie nitted as native. Then, , Helleborus fetidus, 
times native. The list, indeed, exhibits a curious sitll in 
the treatment of planis; if Ligustrum, oon ganja Cotyledon, - 
and Fragaria chilioensis are included in the book in 
other, as aliens or as natives requiring phan aie is not some 
reference also made to Fraxinus, Diplotaxis tenuifolia (very frequent 
