Checklist » Polypodiaceae » Polypodium glycyrrhiza
Last updated 12/28/2008 by David Giblin.
Polypodium glycyrrhiza D.C. Eaton[FNA2, HC, HC2]
licorice fern

Publication: Amer. J. Sci. Arts. ser. 2, 22: 138. 1856.

Origin: Native

selected vouchers: WTU

Notes: FNA2: "Polypodium glycyrrhiza hybridizes with P . calirhiza and with P . hesperium to produce sterile triploids with misshapen spores. Polypodium glycyrrhiza was involved in the origin of both of these allotetraploid species, and some individuals can be difficult to identify. Free versus anastomosing venation distinguishes this species from P . calirhiza ; the presence of adaxial hairs on the rachis separates it from P . hesperium . An additional character for distinguishing these taxa is spore length, which is less than 58 µm in diploid P . glycyrrhiza and more than 58 µm in the two tetraploid species."

References: (none)

Synonyms & Misapplied Names:
Polypodium aleuticum A.E. Bobrov
Polypodium falcatum Kellogg
Polypodium occidentale (Hook.) Maxon
Polypodium vulgare L., misapplied
Polypodium vulgare L. var. falcatum (Kellogg) H. Christ
Polypodium vulgare L. var. occidentale Hook.[Peck]