19th April 2019

Happy Primrose Day. Primroses are such wonderful harbingers of spring that they deserve their own day of recognition and, flowering so early, they benefit many insects. Only the long-tongued (proboscis) ones like Bee Fly, Brimstone Butterfly, Peacock, and Buff-tailed Bumblebee (see photo’s) can take advantage as the nectar is at the bottom of a long tube (corolla). Look closely and you can see that Primroses are either Pin-eyed (having a single pin-head female style visible at the top of the corolla/ tube,) or Thrum-eyed (having a ring of pollen-laden anthers at the top of the tube). If you carefully opened one up you would see that half-way down the tube sits the opposite reproductive part. This is called being  heterostylous, and avoids self-pollination and ensures cross-pollination. An insect picking pollen up from the Thrum-eyed would only pollinate a Pin-eyed and vice versa because of where the pollen is situated. Charles Darwin was fascinated by the primula family for this reason. He wrote in his autobiography “I do not think that anything has given me so much satisfaction as making out the meaning of the structure of

Primrose, pin-eye

Primrose, thrum-eyed

Primrose with Bee Fly feeding

Primrose, with Brimstone Butterfly feeding

Primrose, with Bufftailed Bumblebee feeding

heterostylous flowers”. You don’t need to know or care about this to enjoy the Primrose. As children, we would pick bunch after bunch for our relatives who had moved away from the country to town, posting them in damp paper in a shoe-box! It was interesting to hear the nature-writer Richard Maybe saying this morning that Primroses have recovered so well and are now so prolific in many areas that he thought children should once again be allowed the joy that we experienced, of picking small bunches. Conditions: Unseasonably warm with blue skies. Temperature: Max  21 Min 7 C.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s