1 - Vinca minor ? 2 - ? 3 - Euphorbia of some sort? haven't been able to find a species with a red stalk (upper part green, though) 4 - ? A Lamium? Notice the whitish/light-green median part of the leaves 5 - ? found it near a creek, lots of those there. As I recall, it has a hollow stalk, also quite fleshy. 6 - ? As always, any help would be greatly appreciated! (I'm well equipped for IDing trees...as for wild flowers I only have "Photographic field guides - Wild flowers of Britain and Europe' by B.Press and B.Gibbons... it's ok, but it could be better)
I'll second Vinca minor for #1 # two is maybe in the Fabacea? It reminds me of a pea flower. # 5 is neat, but I've no clue # 6 perhaps in the Lameaceae?
Number 2 might be a Lathyris... vernus, I think (my spelling may also be wrong). Would be blooming now (just unfurling here).
1 Vinca minor (Lesser Periwinkle) 2 ? 3 Definitely Euphorbia, possibly Euphorbia amygdaloides (Wood Spurge) 4 Lamium purpureum (Red Deadnettle) 5 Petasites hybridus (Butterbur) 6 A species of Veronica (Speedwell), possibly Veronica chamaedrys (Germander Speedwell)
Most of Michael's suggestions are probably correct except for the dead nettle which is not Lamium purpureum. It is probably Lamium maculatum. I suggest that #2 is a kind of Lathyrus species, probably Lathyrus vernus. I do not know, whether there are any lookalikes in Croatia that do not grow in Central Europe, however.
1 - thanx for confirmation 2 - certainly looks like Lathyrus vernus 3 - this Euphorbia's been puzzling me, thanx for solving that one. 4 - i was quite sceptic regarding L.purpureum because I know that one and I've never seen one with such white blotches. I agree with L.maculatum, that is Lamium maculatum 'Elisabeth de Haas', I suppose. (http://www.pflanzen-vielfalt.de/product.php?products_id=910139) 5 - thank you! 6 - Veronica chamaedrys - looks like it! thank you for your time!