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In addition to common wildflowers like the martagon lily , lily of the valley , wild chervil and wild garlic , various orchids also flourish here including " Cephalanthera " orchids , the yellow coralroot , bird 's - nest orchid , lady 's slipper and lady orchid .
 lily of the valley, Cephalanthera
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 lily of the valley, Cephalanthera