| Nodding onion
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| Umbel
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| Scientific classification
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| Kingdom:
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Plantae
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| Clade:
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Tracheophytes
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| Clade:
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Angiosperms
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| Clade:
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Monocots
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| Order:
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Asparagales
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| Family:
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Amaryllidaceae
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| Subfamily:
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Allioideae
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| Genus:
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Allium
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| Species:
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A. cernuum
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| Binomial name
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Allium cernuum
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| Synonyms
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- Allium alatum Schreb. ex Roth
- Allium allegheniense Small
- Allium cernuum f. alba J.K.Henry
- Allium cernuum subsp. neomexicanum (Rydb.) Traub & Ownbey
- Allium cernuum var. neomexicanum (Rydb.) J.F.Macbr.
- Allium cernuum f. obtusum Cockerell
- Allium cernuum var. obtusum (Cockerell) Cockerell
- Allium cernuum subsp. obtusum (Cockerell) Traub & Ownbey
- Allium cernuum var. obtusum Cockerell ex J.F. Macbr.
- Allium neomexicanum Rydb.
- Allium nutans Schult. & Schult.f.
- Allium oxyphilum Wherry
- Allium recurvatum Rydb.
- Allium tricorne Poir.
- Calliprena cernua (Roth) Salisb.
- Cepa cernua (Roth) Moench
- Gynodon cernuum (Roth) Raf.
- Gynodon elliotii Raf.
- Gynodon rupestre Raf.
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Allium cernuum, known as nodding onion or lady's leek, is a perennial plant in the genus Allium. It grows in open areas in North America.