I don't manage to find an ID for this delicate beauty. I photographed it last year in the nature reserve.
The plant was not tall, maybe around 20-30cm.
Only one picture unfortunately..

I'm sure it's a Veronica Myriam, the flowers and seed pods are much like the tall one I have but that has serrated foliage edges.

This is similar..Veronica barrelieri subsp. nitens but not quite right

http://www.actaplantarum.org/f...

Veronica barrelieri ssp. barrelieri.. no

http://www2.arnes.si/~bzwitt/f...

Veronica maritima.. serrate foliage

http://www2.arnes.si/~bzwitt/f...

Veronica spicata..

http://nature.jardin.free.fr/v...

A hybrid of V. spicata which doesn't have serrate foliage..

http://www.growsonyou.com/phot...

This one does have serrate foliage but it's close! I wonder if there are two types of foliage with the ones near the flowers being simple..

http://www.flowerspictures.org...

The wild V. spicata here has simple foliage.. but deeper purple flowers, spicata looks like the one, it will vary in different situations.

http://www.brc.ac.uk/plantatla...

http://www.hlasek.com/veronica...

Veronica longifolia is similar..

http://www.hlasek.com/veronica...

The flowers look closer to longifolia if these pics are correct, leaves look serrate ..

http://www.shutterstock.com/pi...

Leaves also look broader.. yours could be broader further down the stem..

http://www.ofnc.ca/fletcher/re...

Herbarium specimen seems to rule longifolia out..

http://www.linnean-online.org/...

Not sure!

http://www.sarkanperennataimis...

http://pl.wikipedia.org/w/inde...

Veronica longifolia 'Exaltata' (the next two links don't work but are in the page of pics on wiki)

http://commons.wikimedia.org/w...

http://commons.wikimedia.org/w...

All pics of longifolia have broader foliage..

http://commons.wikimedia.org/w...

http://luirig.altervista.org/f...

Veronica spicata looks most likely.

Photos of C. spicata in the wild..

http://www.flickr.com/photos/d...

http://www.flickr.com/photos/d...

V. longifolia... foliage not shown on the paler one, foliage definitely very serrate on others.

http://www.pbase.com/hhf/image...

http://www.pbase.com/hhf/wildf...

http://calphotos.berkeley.edu/...

Thanks Janet, my first thought was exactly Veronica spicata, but after googling pictures I came back on that, because the flower spikes are so densely covered with flowers, while mine has the very tiny flowers widely apart along the spike..
Could it be a mall nourished veronica spicata perhaps?

That was my thoughts Myriam, it could also be a first year flowering. I can't see it would be anything else, but it could be.

It might be reaching for the sun and not found it too.

Thanks Janet, I also don't see another option!

I'll try to remember where exactly I found it, next year it might have grown more mature