I have always been very wary, in fact scared, of certain plants - generally ones with spikes, barbs, thorns or prickles - the sort you can be stung by, scratched by, wounded by, or get impaled on. I don't think this is a silly fear, as it's clearly worth keeping out of harm's way. But the plants I want to talk about are the sort that do more than give you a cut or a nasty rash. I mean to discuss
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