Mystery Plant?

I went up the mountains on Bute today with the wildlife ranger, to photograph wood ants (and anything else interesting). We came across this mystery plant growing under short heather on one of the forestry roads. It had the tall yellow flowers(?) and seemed to spread with the pale green foliage along the ground. The flowers are about 3 inches tall and the spread of the plant about 3 feet. I have included an insert of the flower, top left.
Yet again I ask for your help guys - it is not in any of our books (we think)
Best wishes
Phil

Hi Phil,

Should be in your books. It looks like Stag's-horn clubmoss Lycopodium clavatum. It's common on mountain moors heath & grassland in Scotland & Wales.

Thanks Nick, it doesn't get a mention in the book I looked in, but it is in the other one - looks like I'll be chucking a book out!
Very much obliged
Phil

- make sure you open the window 1st

Hi Phil,
Looks like Nick has covered the I.D. which is handy as I wouldn't know where to start .

Interesting and unusual looking species you've found there.