10 



herbage. The number of species becomes gradually fewer 

 as we proceed from the south east of the islands northwards 

 and westwards. As regards the kind of soil they invest we 

 may class them in three groups ; 



1st. Weeds that mark a barren, sandy or gi'avelly soil- 



Eanunculus arvensis . . . Field crowfoot. 



Spergula arveusis Spurrey. 



Scleranthus anuuus Kuawel. 



Trifolium arvense Haresf oot clover. 



Torilis nodosa Knotted hedge parsley. 



Echium vulgare Vipers bugloss. 



Filago germanica ) Cudweeds. 



„ mmuna ) 



Eumex acetosella Sheepsorrel. 



2nd. Weeds of clayey soil. 



Siuapis arvensis Charlock. 



Potentilla auserina Goosegrass. 



Tussilago f arf ara Coltsfoot. 



Carduus arvensis Field Thistle. 



Bartsia odontites Field eyebright. 



Avena f atua Wild oat. 



Alopecurua agrestis ... Black bent. 



3rd. Weeds of rich good land. 



Fumaria officinalis Fumitory. 



Senecio vulgaris Groundsel. 



Veronica hederifolia) a j u 



„ agrestis.. .[ - Speedwells. 



Chenopodium album ... Mj'les Baconweed. 



Euphorbia Peplus . ■ • ) o 



„ helioscopia ) ^^ ° 



Polygonum Persicaria.) ti i j. 

 f 1 4.1 -r 1- r Peachwort. 

 ,, & lapathuolium) 



Mercurialis annua French Mercury. 



If weeds of group one make special headway, the land 

 wants improving by salt and manure, if those of group two, 

 it wants draining and pulverising, whilst those of group 

 three, indicate good soil neglected, and nothuig will eradicate 

 them but industry. 



