- Thesoft,spongelike,centralcylinderofthestemsofmostfloweringplants,composedmainlyofparenchyma.AnyofvariousediblemushroomsofthegenusMorchellaandrelatedgenera,characterizedbyabrownishspongelikecap.ChrisDavidsonofDurhamUniversity,whohaswrittenahistoryoft...
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