<p>The shamrock is a huge part of St. Patrick’s Day celebrations, but what exactly constitutes a shamrock has had botanists debating for years. One thing they all agree on: It has 3 leaves. So what is it called if it has 4? A mutant. On this week's mini-sode we take a look at the unusual history that lurks within the mutant shamrock.</p>

The shamrock is a huge part of St. Patrick’s Day celebrations, but what exactly constitutes a shamrock has had botanists debating for years. One thing they all agree on: It has 3 leaves. So what is it called if it has 4? A mutant. On this week's mini-sode we take a look at the unusual history that lurks within the mutant shamrock.

<p>The shamrock is a huge part of St. Patrick’s Day celebrations, but what exactly constitutes a shamrock has had botanists debating for years. One thing they all agree on: It has 3 leaves.&nbsp;So what is it called if it has 4? A mutant. On this week's mini-sode we take a look at the unusual history that lurks within the mutant shamrock.</p>

4-Leaf Clovers: How Mutated Shamrocks became a Symbol of Good Luck

The Unusual History of Every Thing is a podcast for lovers of the weird history of common things in our world. Join cultural object preservationists Melanie Dellas and Karen Lacy as they uncover the unusual histories of every thing around us.

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4-Leaf Clovers: How Mutated Shamrocks became a Symbol of Good Luck

4-Leaf Clovers: How Mutated Shamrocks became a Symbol of Good Luck