Pollination Biology & Seed Dispersal; it's sometime that more or less porose anther and pendulous flowers are buzz pollination is suggested, but nectar is sometimes produced (buzz pollination being something probable, but observations being few) (2004
Pollination Biology & Seed Dispersal. The more or less porose anthers and pendulous flowers suggest buzz pollination, but nectar is sometimes produced; buzz pollination is indeed likely, but observations are few (Coode 2004).