opposite (including sub-opposite)

Current definition: 
With two leaves at each node ie. the leaves in pairs, the members of each pair on the same level (or almost the same level) as one another and on opposite sides of the stem.
Feature ID: 
39
Feature Status: 
Core
Glossary: 
insertion

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith