English: creeping thistle
Welsh: ysgallen y maes
Subject: Planhigion
Welsh definition: Cirsium arvense
English context:  * i. spot treat and control injurious weeds to the minimum extent this is necessary, including spear thistle, creeping thistle, curled dock, broad-leaved dock and ragwort; and to control invasive non-native species, like rhododendron, Himalayan balsam, giant hogweed: or [1]
Plural: ysgall y maes