jhn7's picture

Primrose

Observed: 25th February 2011 By: jhn7
S159 Neighbourhood Nature - course complete
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P1100693-1
P1100694-1
Description:

I haven't walked this path for a couple of days because it was too muddy. What a lovely surprise to find yesterday's sun must have brought this into flower.

Identifications
Species interactions

No interactions present.

Species with which Primrose (Primula vulgaris) interacts

Comments

Jonathan's picture

This plant has the 'pin' form

This plant has the 'pin' form of the flower. The other, which you should find in equal abundance is 'thrum'.

Jonathan
University of Edinburgh and Biodiversity Observatory (OU)

jhn7's picture

Thanks, but please explain!

I'm afraid I don't know what 'pin' or 'thrum' are. I'm guessing pin might be something thin and sharp - maybe the middle part of the flower but thrum just rhymes with drum!

Janet
Certificate in Contemporary Science (Open)

Fenwickfield's picture

Tum

I have no idea either so would love to know too.
Sheila

Fenwickfield

Roger Gilbert's picture

I remember doing this as a disection for O Level ...

it is to do with where the anthers and pistel are in the flower to minimise the chance of self polination. If you look at the center of you flowers you will see there is a small round yellow structure. This is the top of a stalk which goes down to the base of the flower and is the Pistel (Female part of the flower), in this version of the plant the Anthers are in a ring of pads around the inner tube about half way down. The other type has the pistel half way down and the anthers at the top.
Just found this link which illustrates it perfectly
http://www.countrysideinfo.co.uk/devon_bap/prim2.htm

Howardian Local Nature Reserve
http://www.howardianlnr.org.uk

jhn7's picture

Thank you for this really interesting clarification!

I shall have to look more carefully in future, what amazing complexity and design there is in nature.

Janet
Certificate in Contemporary Science (Open)

Roger Gilbert's picture

I think it works ...

so that an insects tounge probing the flower will pick up the pollen from the Anther of one type and it will be in the right place for the Pistel of the other type.

Howardian Local Nature Reserve
http://www.howardianlnr.org.uk

Fenwickfield's picture

Thank's

Very educational and well explained.

Sheila

Fenwickfield

Jonathan's picture

Charles Darwin was the first

Charles Darwin was the first to discover this difference and wrote a whole book about this phenomenon.

Jonathan
University of Edinburgh and Biodiversity Observatory (OU)