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Common adler's tongue is the common name of ophioglossum vulgatum. The fronds are six to nine inches long. The fertile spike is one inch or more long.

Common Adler's Tongue

Common adler's tongue is the common name of ophioglossum vulgatum. The fronds are six to nine inches…

Ophioglossum vulgatum ambiguum is a smaller form of common adler's tongue. The spike is one to two inches in length.

Ophioglossum Vulgatum Ambiguum

Ophioglossum vulgatum ambiguum is a smaller form of common adler's tongue. The spike is one to two inches…