yellow lady's slipper, yellow lady-slipper, Cypripedium calceolus, Cypripedium parviflorum
['platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'axolotl, mud puppy, Ambystoma mexicanum', 'acorn', 'spaghetti squash', 'fly', 'bow tie, bow-tie, bowtie', 'French horn, horn']