The orchid Oncidium Chaculatum is a hybrid registered with the Royal Horticultural Society by OrchidWorks in 2002. It is originated by J.W.McCully
Top three species ancestors and their influences are

• Oncidium maculatum (50.00%)  section: Oblongata 
• Oncidium noezlianum (25.00%)
• Oncidium incurvum (25.00%)