1 58 Brenchley . — The Weeds of Arable Land . III. 
Nepeta hederacea Taraxacum vulgare 
Reseda lutea Veronica arvensis 
Rumex obtusifolius 
Weeds only associated with cereal crops. 
Anthemis Cotula 
Galeopsis Tetrahit 
Heracleum Sphondylium 
Juncus bufonius 
Lapsana communis 
Lolium perenne 
Poa trivialis 
Ranunculus arvensis 
Sagina nodosa 
Sisymbrium officinale 
Weeds only associated 
Brassica arvensis 
Centaurea nigra 
Chrysanthemum segetum 
Fumaria officinalis 
Lamium amplexicaule 
with cereals and roots. 
Lamium purpureum 
Linaria minor 
Raphanus Raphanistrum 
Senebiera Coronopus 
Silene noctiflora 
Weeds only associated with seeds and legumes. 
Cirsium lanceolatus Geranium dissectum 
Filago germanica 
Comparison with the Bedfordshire results (1910) show that many 
species are consistently absent from or very rare in seed crops in both 
districts. 
Nearly all the weeds are to be found to some extent among the cereal 
crops, and generally the kind of cereal makes no difference. A few plants, 
however, seem to exercise some selection as to which cereal crop in the 
rotation they associate with. Most of these species are generally or 
exclusively found with wheat, while yet a few more are never seen with the 
corn, but only with barley or oats. 
Anthemis Cotula 
Erophila verna 
Juncus bufonius 
Poa trivialis 
Sagina nodosa 
- always found with wheat. 
Alchemilla arvensis 
Alopecurus myosuroides 
Cerastium vulgatum 
Chrysanthemum segetum 
Heracleum Sphondylium 
Ranunculus arvensis 
Rumex obtusifolius 
Triticum repens 
V usually found with wheat. 
