OK...so I bought Miles Irving's book last year and wanted to try the lacey-leaved umbellifers. But I wasn't sure about Hemlock, having never tried to identify it before. All year I looked for it and finally found some a couple of weeks back. It's pretty easy to identify as a mature plant. It smells bad and it has purple blotches on the stem. The question is this: would I so easily recognise a young one next year, or are they easier to confuse with edible umbellifers when young?