Common woodfern (Dryopteris filix-mas) sporangia — ⓘ

Dryopteris filix-mas sporangia | Source

← class: Polypodiopsida

order

Polypodiales

Cathetogyrate ferns

families:

Description

Ferns bearing sporangia with vertical annuli interrupted by the stalk and stomium.

Occurrence map Cathetogyrate ferns (Polypodiales) in Finland — ⓘ

Source

References:

Smith, A. R., et al. (2006). A classification for extant ferns. Taxon, 55(3), 705-731. doi: 10.2307/25065646