Bearded Iris: grows from a rhizome.
What is the difference between these terms: bulb, corm, rhizome and tuber? We all use these terms, but what do they mean? How do you tell the difference between them?
Bulb: an upright, underground stem with overlapping, fleshy sales (think onion, tulip).
Corm: Underground stem with no overlapping scales OR very few scales (think crocus, gladiolus)
Rhizome: a scaly underground stem (think bearded iris or canna)
Tuber: modified underground stem produced at the tip of a rhizome (think white or sweet potato).
Happy gardening!
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