What is the function of throat scales in the family of roughleaves?

Answer

Dear Mike,

The throat scales of the Boraginaceae arise as an invagination or thickening of the petals. They are linked to pollination and the plant-pollinator relationship. By constricting the corolla tube, they force the pollinator into a certain orientation that promotes pollination. Possible color differences with the rest of the crown and associated glands also play a role in the plant-pollinator relationship.

regards,

Quinten