Word of the Week: Sporangium

Sporangia_Dryopteris_marginalis_frond_Jun_ELM

The sori consisting of stalked sporangia of native Dryopteris marginalis (marginal wood fern) appear on either side of the medi­an vein of a pinnule in-between the margin and the midrib. The location of the sori along the margins gives rise to this fern’s epithet and common name.
Photo © Elaine Millls

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