There is a neglected patch of garden behind my garage that has burst
into life. It is covered in a plant that looks very much like a few
dozen romaine lettuce. The leaves don't taste of lettuce, in fact they
don't taste at all. There are few spikes on the leaves which are too
soft to prick anything. There are no signs of flowers. Nothing seems
to want to eat it! No slug, snail, or insect damage at all.

Any guesses?

Steve

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