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Sceptridium rugulosum is a fern in the family Ophioglossaceae.

Sceptridium rugulosum resembles S. dissectum (dissected grapefern) and S. multifidum (leathery grapefern), with which it commonly grows; however, its leaf emerges from the ground in late May, before the former and after the latter. The sterile deltoid-shaped leaf blade averages 4-8 cm (1.6-3.1 in.) long, with the petiole more or less the same length (shorter in sun forms and longer in shade forms). Unlike the rounded lobes.. more

Similar species: Ophioglossales
Species identified by Gary B
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By Gary B

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Uploaded May 17, 2019. Captured May 10, 2019 16:15 in 4408 Miller Rd, Barnum, MN 55707, USA.
  • Canon EOS Rebel T6
  • f/5.6
  • 1/197s
  • ISO100
  • 100mm