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Webster 1913 Edition

‖

Noun.

[NL. See

, and

(Bot.)

A sporangium or conceptacle containing only large spores; – opposed to

microsporangium

. Both are found in the genera

Selaginella

Isoctes

, and

Marsilia

, plants remotely allied to ferns.

macrosporangium ‎(plural macrosporangia)

megasporangium — see megasporangium