There are two forms of common Primrose plants: In Pin-eyed Primroses, a green ‘pin-shaped’ stigma or female part is visible, while Thrum-eyed (this may be from Old English Thrum meaning loose thread or fringe- my theory!) have a cluster of pollen covered anthers visible. If you look carefully, some way down the flower tube, you will see the anthers below the stigma, in the Pin-eyed, and the stigma below the anthers in the Thrum-eyed. As long-tongued insects, (like those few species of Butterflies which overwinter as adults in this country, such as Brimstone or Peacock), visit
to feed on the nectar at the bottom of the flower-tube, the position of the anthers/ pollen ensure that they can only pollinate a flower of the opposite arrangement. So, the butterfly gathers pollen from a Pin-eyed on the part of the body that ensures it pollinates a Thrum-eyed and vice versa. This ensures cross pollination. (Apologies for the recent break in transmission- trouble with my blog site!), Conditions: After a hot, sunny day yesterday, today was cloudy, showery and cooler. Temperature: Max11- Min 6c.