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In some orchids the column has a basal extension known as the column foot. It can continue in the same line as the column, be projected at right angles to the column and be straight or curved. The column foot in most species is moderately short but it can be long and prominent or very short. In Vappodes the column foot has two prominent basal swellings separated by a deep central groove.
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Present with prominent central groove |
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Present without prominent central groove |
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Absent |