Only to certain plants. Specifically, the tree exerts an allelopathic effect on surrounding vegetation. That effect actually is a germination inhibitor, which keeps plants from maturing into attractive, healthy plants. But they are not poisonous for humans.
23:41, 14 December 2011
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A plant frozen in Siberian permafrost for over 30,000 years ...
Also known as corpse flowers or stinking flowers. When in ...
St John's wort is a perennial plant with extensive, ...
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