Sceptridium oneidense, the blunt-lobed grapefern, is a fern species in the family Ophioglossaceae.[1]

Sceptridium oneidense
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Ophioglossales
Family: Ophioglossaceae
Genus: Sceptridium
Species:
S. oneidense
Binomial name
Sceptridium oneidense
(Gilbert) Holub
Synonyms
  • Botrychium dissectum var. oneidense (Gilbert) Farw.
  • Botrychium dissectum f. oneidense (Gilbert) Clute
  • Botrychium oneidense (Gilbert) House

Description

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The leaf blades of S. oneidense are ternately compound. The spores mature in late fall in panicles that rise above the sterile fronds.

Taxonomy

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At first, S. oneidense was considered a variety of Botrychium dissectum, then a form of it, then possibly a hybrid species. However, after a more detailed study by Wagner in 1961, it was considered its own species.

Distribution and habitat

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S. oneidense grows in moist woodlands in eastern United States and Canada from New Brunswick to Ontario and south to North Carolina. In Canada, it is a relatively rare species, usually only found in large groups of Botrychium obliquum.[2]

References

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  1. ^ Christenhusz, Maarten J. M.; Zhang, Xian-Chun; Schneider, Harald (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54. doi:10.11646/phytotaxa.19.1.2.
  2. ^ Cody, William; Britton, Donald (1989). Ferns and Fern Allies of Canada. Agriculture Canada.