Stapledon . — On the Plant Communities of Farm Land . 1 71 
(#) Species only occurring at the Lower Elevations ; but which even then 
are in most cases rare or occasional. 
Europhila verna . 
Papaver dubium. 
Scabiosa arvensis. 
Aethusa Cynapium. 
Convolvulus arvensis. 
Veronica hederae folia. 
V. arvensis. 
L amium ample xic aide. 
L . purpureum. 
Euphorbia exigua . 
( b ) Species rare or exceptional at the Higher Elevations. 
Fumaria pallidiflora. Arenaria serpyllifolia. 
Silene Cucubalus .* Bromiis hordeaceus. 
Lychnis alba.* 
more abundant at the Lower Elevations. 
(e) Species decidedly 
Alchemilla arvensis. 
Galium Aparine .* 
Sherardia arvensis .* 
Matricaria inodora .* 
Lapsana communis * 
Sonchus oleraceus. 
S. arvensis. 
Anagallis arvensis. 
Myosotis arvensis. 
Stachys arvensis. 
Chenopodium album A 
(d) Species frequently more abundant at the Higher Elevations. 
Ranunculus repens. 
Spergula arvensis .* 
Hypericum pidchrum.\ 
Vicia Cracca. f 
Lotus cornicidatusp 
Lathyrus pratensis.\ 
Potentilla ercctaf 
Chrysanthemum segetum* 
Hieracium umbellatumf 
H. b ore ale . f 
Gale op sis Tetrahit . 
G. versicolor. 
Rumex Ace to sella .* 
Luzula ere eta. \ 
A rrhenatherum tuberosum. 
Festuca ovinaf 
(e) Species which Moss has noted as absent on the no-Wheat zone in the 
Peak district ; but which in Mid-Wales are freely distributed above 800'. 
Geranium mo lie.* \ 
G. dissectum* I These species do not, however, attain to their full 
Veronica agrestis. 1 luxuriance at the higher elevations. 
Mentha arvensis. ) 
* These species are all more or less common impurities in clover seeds. 
( 12 ). 
See Stapeldon, R. G. 
f These species are normally weeds of grass-land. See p. 172. 
