Blue lotus may refer to:

• Nymphaea caerulea, also known as the Blue Egyptian water lily, an aquatic flower native to Egypt
• Nymphaea nouchali, also known as the Red and blue water lily, Blue star water lily or Star lotus,an aquatic flower native to the Indian subcontinent
• Nelumbo nucifera, also known as the Red and blue water lily, Blue star water lily, or Star lotus, an aquatic flower native to tropical Asia and Queensland, Australia
• The Blue Lotus, a book in the Tintin series

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