(in Orchidaceae) a viscid part of the rostellum, which is clearly defined and removed with the pollinia as a unit, and serves to attach the pollinia to an insect or other agent.
The DRC flora team(2025). Flora of the Democratic Republic of Congo: Glossary details: viscidium . https://www.drcongoflora.com/speciesdata/glossary-display.php?glossary_id=832, retrieved 3 July 2025
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