1 66 Stapledon . — On the Plant Communities of Farm Land. 
Mid-Wales. 
Spergula arvensis . 
Ornithopus perpusillus. 
Chrysanthemum segeUim . 
Stachys arvensis. 
Gale op sis versicolor. 
Scleranthus annuus. 
R umex A ceto sella. 
COTSWOLDS. 
Ranunculus arvensis. 
Thlaspi i arvense .* 
Pap aver R hoe as. 
Lychnis Githago .* 
Erodium cicutarium .* 
Scandix Pecten- Veneris .* 
I^egousia hyhrida. 
Lithospermum arvense. 
Clinopodium vulgare. 
Allium vine ale* 
* These species have been noted by Salter (7) as occurring in Cardiganshire, but have not been 
seen on the arable lands investigated. 
A number of species are far more abundant on the farm land of one 
district than the other. The following are good examples : 
Mid-Wales. 
Ranunculus repens. 
Calamintha officinalis . 
Galeopsis Tetrahit. 
Polygonum Persicaria. 
A rrhenatherum tuberosum. 
COTSWOLDS. 
Silene Cucubalus. 
Erophila verna. 
Brassica nigra. 
Geranium spp. 
Aethusa Cynapium. 
Scabiosa arvensis. 
Lamium amplexicaide. 
L. pur pur eum. 
Convolvulus arvensis. 
Alopecurus myosuroides. 
Agropyron repens. 
It is interesting in this connexion to note the behaviour of certain 
closely allied plants ; the following are the species of three common genera 
for the two districts : 
Mid-Wales. 
Fumaria pallidiflora . 
Veronica agrestis. 
Plant ago lanceolata. 
COTSWOLDS. 
F. officinalis. 
Veronica hederaefolia. 
V. Tournefortii. 
P. media. 
These results will be further alluded to in the next section. 
