ON THE FLORA OF THE ENVIRONS OF BRADFORD. 11 
Viburnum Lantana, Asperula cynanchica, Centaurea Cyanus, Cichorium, 
Picris, Helminthia, Campanula Trachelium, Cuscuta, Echium, Solanum 
nigrum, Orobanche, Salvia, Calamintha officinalis, C. Acinos, Galeopsis 
Ladanum, Lysimachia Nummularia, Euphorbia amygdaloides, Cerato- 
phyllum, Carpinus, Spiranthes, Iris ’ fatidissina, corus. 
oa : et of the species which do appear in the 
appended lists, I find t bey. amount to 607 out of the 1707 of 
Babington’s ‘‘ Masi) and that 144 of these are‘plants which have only 
been found in the limestone regions. Confining our attention to the 
less rare plants—for no argument can be founded on the absence of a 
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are commonly found in Craven, on the one hand, or near Pontefract or 
Askern on the other, or in both of ihees districte, but which are rarely 
or never seen in the neighbourhood of Bradford. Of these we may 
mention in particular, as characteristic of the Craven a Arabis 
hirsuta, Sisymbrium thalianum, Draba muralis, D. vern |, Viola lu 
Alsine v 
ride. 
Askern flora we may note Reseda lutea, R. Luteola, Viola odorata, 
Hippuris vulgaris, -Bryonia dioica, C#nanthe fistulosa, Conium 
maculatum, Hottonia palustris, Samolus, pg we Orchis Moro, 
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y, as alike | 
tinguishing both these regions from the Bradford district, ra 
have Helianthemum vu , Malva sylvestris, sige Sanguisorba, 
Galium verum, Seabiosa Columbaria, Primula veris, Ophrys a he 
Most of these, except the water plants, ovate require a limeston 
soil to enable them to miata their round ; and same may be 
said of several species which are only occasionally met with in one or 
both of the limestone areas, as Clematis Vitalba, Anemone Pulsatilla, 
Acten spicata, Hypericum hirsutum, Rhamnus catharticus, Melilotus 
dalis, ifera, Convallaria majalis, Polypodium calcareum, 
Ceterach officnarum account for the absence from the neigh- 
bourhood of Bradford of such plants as Hottonia, Hydrocharis, 
Utricularia, and the Water Lilies, we have only to observe that, 
instead of the deep pools or well-filled mace in which these plants 
live, we have here only Sant ams which partake more or less of the 
character of mountain torr 
To determine with scat to every _geraace plant which is found 
on the limestone, but not on the millstone grit or the coal measures, 
the reason for its preference of one region to the other, would require 
a more tenigretl investigation than can be undertaken here;. but 
there can be li oubt iy one result of such an ing would 
to show that in aia in most cases the preference is not for 
limestone as a chemical beast but as a substance possessing those 
physieal properties (the effects probably of chemical action) which 
constitute the difference between a warm, dry soil and a damp, cold 
one. 
Moors.—The highest parts of the moors are mainly occupied by 
