Morphology and ultrastructure of orbicules in the subfamily Ixoroideae (Rubiaceae)
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Orbicules were studied in 43 species belonging to 32 genera of the five tribes of the Ixoroideae (Rubiaceae). The orbicules were investigated with scanning electron microscopy (SEM), light microscopy (LM), and transmission electron microscopy (TEM). Orbicules ... ...
