Brenchley . — The Weeds of Arable Land. III. 143 
Fumariaceae. Fumaria officinalis} Characteristic of light and chalky 
soils, never seen on clay. Occasionally dominant. 
Cruciferae. Brassica alba . Very rarely seen, and then on light and 
sandy loam ; once dominant on sandy loam. 
Brassica arvensis (B. S inapis). Found on all types of soil. Specially 
frequent on clay and heavy loam, rare on sand. Sometimes dominant 
on chalk, clay, and loam. 
Capsella Bursa-pastor is. Universally distributed on all soils ; very 
common. Occasionally dominant on loam. 
Raphanus Raphanistrum. Characteristic of chalk and sand. Occa- 
sionally dominant on chalk. 
Sisymbrium Thalianum ( Arabis Thaliana). Associated exclusively 
with light loams and sandy soils. Occasionally dominant, usually dis- 
tributed. 
Resedaceae Reseda lutea. Confined to chalk and sand. Infrequent 
in occurrence, never dominant. 
Violaceae. Viola tricolor. Characteristic of light soils, sand, and 
chalk. Never dominant. 
Caryophyllaceae. Arenaria serpyllifolia . Confined to light sandy 
and calcareous soils. Occasionally dominant on light sandy loam. Far 
more frequently seen than in the previous years’ work. 
Cerastium vulgatum , Occurs on all types of soil, though rarely on 
clay. Generally distributed, never dominant. 
Lychnis alba. Chiefly associated with the lighter soils and sandy loam, 
though it is found on all types of land. The plant is very widely spread, 
but only occurs in small quantities. 
Lychnis Githago. Usually occurs on loam. Generally scarce in 
distribution. 
Silene anglica. Confined to sandy soils. Never very prevalent. 
Silene inflata (S. Cucubalus). Chiefly on chalky and light soils. 
Twice dominant on sand, but usually distributed or occasional. 
Silene noctiflora. Practically confined to the light soils and chalk. 
Usually distributed, never dominant. 
Spergula arvensis . Confined to sand and light soils of a non- calcareous 
character. Frequently dominant on sand. 
Stellaria media. Distributed over all types of soil ; occasionally 
dominant on the lighter lands. 
Geraniaceae. Erodium cicutarium. Distributed on sand and very 
light soils. 
1 The nomenclature throughout is now taken from Hayward’s Botanist’s Pocket Book, 13th 
edition, 1909. In the earlier papers that of Bentham and Hooker’s British Flora was used, and the 
old collective name ‘ Fumaria officinalis ’ is retained, as this genus is exceedingly difficult to subdivide 
in the field under the conditions of the investigation. Where any change has been necessary the 
name previously used is added in brackets. 
