« Reply #4 on: Tuesday 27 November 12 01:04 GMT (UK) »
I found an old book online and it looks like the boy might have been picking a variety of the mustard family:-
BOUGHT WITH THE INCOME OF THE SAGE ENDOWMENT FUND
THE GIFT OF HENRY W. SAGE - 1891
"Contribution to an Essex dialect diction "
Carlick (carlock) : charlock {Sinapis arvensis).
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Websters Dictionary: CHARLOCK: an Old World mustard (Brassica kaber syn. Sinapis arvensis) that is a common weed in grain fields —called also wild mustard .
Aberdeen: Findlay-Shirras,McCarthy: MidLothian: Mason,Telford,Darling,Cruikshanks,Bennett,Sime, Bell: Lanarks:Crum, Brown, MacKenzie,Cameron, Glen, Millar; Ross: Urray:Mackenzie: Moray: Findlay; Marshall/Marischell: Perthshire: Brown Ferguson: Wales: McCarthy, Thomas: England: Almond, Askin, Dodson, Well(es). Harrison, Maw, McCarthy, Munford, Pye, Shearing, Smith, Smythe, Speight, Strike, Wallis/Wallace, Ward, Wells;Germany: Flamme,Ehlers, Bielstein, Germer, Mohlm, Reupke