Annual growth rings in herbs are usually only visible by means of a microscope and a specific staining method. Ring-like patterns visible in roots cross sections by the naked eye may be false rings . The width of annual growth rings depends on conditions during formation; in a favorable year it is wider and in a less favorable year  narrower.
Annual growth rings in herbs are usually only visible by means of a microscope and a specific staining method. Ring-like patterns visible in root cross-sections by the naked eye may be "false rings" . The width of an annual growth ring depends on conditions during its formation: in a favorable year , a ring is wider, and in a less favorable year it is narrower.
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roots cross sections
root cross-sections
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false rings
"false rings"
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annual growth rings
an annual growth ring
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formation;
its formation:
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it is wider
, a ring is wider,
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it is