These are 3 plants I found alongside our road here and was wondering if they are edible or not, thanks!
So does that make it edible, tipularia? If I may suggest it, a dependable and more conventional way to have access to edible plants, particularly for one who doesn't know plants, is to grow a garden. Programs to provide community garden plots exist in some neighborhoods, for those who don't have their own yards.
I found most species of Rumex have pretty bitter leaves, but I have found young R. crispa leaves to be OK in small quantities. Some Rumex seeds make good seed crackers - tasty but the maker was not able to confirm which species was used. I've heard you can also grind them for flour but I have not tried this. I've made tea with both pineapple weed and wild chamomile, but was not crazy about the flavour of either. Some folks are fans of this however.
Can you get pics of the foliage of #2, to confirm if it is Common Bird's-foot-trefoil Lotus corniculatus?
"Bacon and eggs" was a common name I found for it due its coloration. Doesn't look like it would be good to eat. LINK
Good fodder for livestock, similar to clover. An unauthorised renaming, though. The correct English name is Common Bird's-foot-trefoil.
For English language names of UK & Eire native plants (which Common Bird's-foot-trefoil is), the Botanical Society of the British Isles (BSBI), under mandate from the EU via the UK & Eire governments. Similar authorisations exist in other European languages in other EU countries; they are done to provide standard vernacular names for legislative purposes. For an outside authority (e.g. USDA, etc) to make a change to the official name (i.e., telling us that we don't know the right names for our own native plants) is unwelcome imperialism. Fine to use such changes 'between consenting adults in private', but it isn't good in an international public situation.
Not enough visible in the pic to go on; docks are a difficult genus. Try keying it through the key in the Flora of North America here: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=128864 (that is, if you can get the link to work! the FNA site has been very slow or down, the last week or two)
Has the UK government started mandating things over here again? I thought those imperialist learned their lesson over 200 years ago. Sort of like having sex.