thrum

Primula vulgaris Megan `Lemon Yellow`
Yellow Primrose

from wikipedia
"The flowers are hermaphrodite but heterostylous; individual plants bear either pin flowers or thrum flowers. Fertilisation can only take place between pin and thrum flowers. Pin-to-pin and thrum-to-thrum pollination is ineffective."

was expecting rain but it didn't come!
an evening meal with E