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With the wing in the open-position a membrane fold touches the tegula .
They both have bifoliate pseudobulbs that are separated by a long rhizome covered by coriaceous bracts, a pollinarium of Type 1 composed of a liguliform tegula , with conspicuous resin or wax-like rewards at the lip surface.
The concave-shaped tile is the tegula and the convex-shaped tile, holding together the two tegulae, is the imbrex.
With pollinarium removed, exposing the scar left after the removal of the tegula .
However, some 2kg were identified as fragments of tegulae , while 1kg comprised fragments of imbrex.
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