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A square stem, clusters of tiny blue flowers in the leaf axils and a strong scent of oil of pennyroyal when its leaves are crushed make American Pennyroyal easy to identify.
However, this all-black, hairy caterpillar doesn't look as we would expect. It's a Woolly Bear, the larva of an Isabella Tiger moth, a species familiar to all of us. Most Woolly Bears are brown on each end and black in the middle but they can be wholly blond, brown, rust, tan or black.
John
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American Pennyroyal |
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caterpillar |