Disa filicornis (L.f.) Thunb., a Cape orchid, was found to be pollinated by mason-bees (Apoidea: Megachilidae). Pollinia are placed on the ventral side of the thorax when bees straddle the anther. After extraction from the anther, the pollinia undergo a curvature of 90° which ensures correct orientation relative to the stigma. The flowers do not produce a nectar reward, but the large number of pollinia carried by bees suggests that bees have a low ability to learn to avoid the flowers. This deception of bees allows the orchid to achieve a high pollination success. Disa filicornis (L.f.) Thunb., ’n Kaapse orgidee, word bestuif deur messelbye (Apoidea: Megachilidae). Polliniums word op die ventrale kant van die toraks geplaas wanneer die by wydsbeen oor die helmknop gaan sit. Na ekstraksie uit die helmknop buig die polliniums deur 90° wat ’n korrekte oriëntasie tot die Stempel verseker. Die blomme produseer nie nektar nie, maar die groot aantal polliniums wat deur die bye gedra word, dui daarop dat die bye ’n swak vermoë besit om te leer om die blomme te vermy. Hierdie misleiding van bye stel die orgidee in staat om ’n hoë mate van bestuiwingsukses te behaal.
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Steven D. Johnson (1992) studied this question.
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