Spiny Cocklebur, Teasel and Fringed Rue.

After walking in the fields I usually bring home at least one of these spiny cockleburs on my clothes and always leave them there as a kind of natural adornment.

Spiny cocklebur (Xanthium spinosum).
(© 2011 LightColourShade. All rights reserved)

Teasel looks a bit like a scaled up spiny cocklebur, but not less beautiful.

Teasel (Dipsacus fullonium). (© 2011 LightColourShade. All rights reserved)

Birch tree seeds are now giving off a lot of fluffy pollen made up of about 10 microns thick silvery threads that I call spring snow (they'll be later followed by aspen trees, which have similar pollen). I love this pollen — they add an air of romanticism to the place.

Birch tree ripening seeds. (© 2011 LightColourShade. All rights reserved)

Birch tree seeds with pollen. (© 2011 LightColourShade. All rights reserved)

This plant with strange looking flowers gives off a peculiar aromatic scent if you rub its leaves between your fingers. I've found out at last that it's fringed rue or ruta chalepensis, a flowering plant in the citrus family native to Eurasia and North Africa.
It turns out the plant is used as a herbal remedy for a number of ailments, such as fever and inflammation.

Fringed rue (Ruta chalepensis) flowers. (by-nc-nd)

Fringed rue (Ruta chalepensis) flower close-up.
(© 2011 LightColourShade. All rights reserved)