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Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Polypodiaceae||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Rhizome long-creeping; scales lanceolate, generally +- brown, 1-colored or often with darker central area or midstripe. Leaf: 0.2--10(20) dm, +- alike or fertile > sterile; stipe glabrous to scaly; blade 1-pinnate to generally deeply pinnately lobed (or simple, unlobed), hairy to not, glandular or not, scales on abaxial midrib near base generally lanceolate or lance-linear, generally +- brown; veins free to fused. Sporangia: sori in 1 row on each side of segment midrib, generally raised, sometimes including sporangium-like structures, shriveled sporangia, or branched or unbranched glandular hairs; spores yellow.
Species In Genus: +- 40 species: generally New World, temperate, tropics, few boreal. Etymology: (Latin: many feet, from persistent petiole bases) Note: Identification complicated in California by fact that 2 or more co-occurring species often hybridize (often indicated by malformed spores), especially in CCo (especially Point Reyes), NCo, where the sterile hybrids may outnumber the parental species, and because coastal ecotypes of several species often have thicker, more succulent blades than inland forms. Polypodium australe Fée except (dubiously reported from but not persisting on San Clemente Island).
Unabridged Note: A specimen from San Clemente Island (Lloyd & Hohn 4420, UC) identified by several workers as Polypodium australe Fée, a European (Mediterranean) sp., lacks rhizome (rhizome important for identification) and definitive provenance (specimen from cultivated plant that is no longer extant so original locality data not fully trustworthy), and so is here excluded. Lloyd and Hohn (Amer Fern J 59:56--60. 1969) explained its presence as a chance introduction of spores carried on hides of European grazing animals. Apparently, it has not persisted on San Clemente Island, if in fact it ever occurred there at all.
eFlora Treatment Author: Alan R. Smith
Jepson Online Interchange
Key to PolypodiumPrevious taxon: Polypodiaceae
Next taxon: Polypodium californicum
Citation for this treatment: Alan R. Smith 2016. Polypodium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=9796, accessed on July 24, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 24, 2016.