Inspired by @NumbahTwo I was thinking of this today, and your list made me laugh, even though it's in a different vein.
  1. Any plants with leaves big enough for a medium sized dinosaur to notice.
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  2. Plants with flowers at least as big as my hand.
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  3. Plants with bright orange spiky neon flowers
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  4. Flowers that look innocent but have sticky undersides that trap and cling
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  5. Plants that look soft but bite you when you touch them
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  6. Plants with burrs that cling to your clothes and you can never get rid of them
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  7. Any plant that looks like it wants to eat you
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  8. Plants that smell delicious but have poisonous reputations
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  9. Plants that want to leave their seeds EVERYWHERE
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