I have growing wild in my garden a plant which I believe belongs to the Sowthistle family when I first saw it I thought it was a common sowthistle I nearly pulled it up till I noticed It had a distinctive single row of spines running along the main rib of each leaf which are now approximately six Inches In lenght when full grown and lanceolate in shape and have a slight prickly edge but nothing like spiny sowthistle otherwise no other spines on the leaves at all at the top of the plant which is close to seven feet tall now small yellow flowers gather at the end of thin stems also from the centre of each leaf from where it joins the main stem similar small thin stems with flower buds are present I,ve checked up on the spiny sowthistle but the leaves are totally different, I,m wondering If this Is one of the glabrous forms where some Intermediates may be hybrids, I,ve been trying to de Imageize some photos I,ve taken but I can,t do due to the nature of my camera get real close ups like I want apart from one picture taken which highlights some of the plant but this Imageizer Is temperamental I use I hope someone can throw some light on to this and give me some Idea what the plant is I,d also like to mention the main stem is round in shape.