Please help ID?

Hi All!

Just joined this forum as been foraging for mushrooms but now that seasons are over i've been looking to expand knowledge into edible and medicinal wild flowers (located in Australia). I've gone out and picked 1 of a few different types and tried to identify myself but having lots of issues. Can anyone help with these three and then i'll put up next three in new post? Thanks all!

#2 looks like Evening Primrose, Oenothera, which has naturalized in many parts of the world.  Generally considered edible and medicinal.  http://www.eattheweeds.com/oenothera-biennis-foraging-standby-2/

#1 looks to be a member of the polyphyletic group but there's a bunch of them.  A photo of the flower would help.

Thanks for the help,when i looked up evening primrose it said flowers grow on top whereas with the plant in second pic flowers appear 1 at a time all the way up the stem. With the first pic the flowers are yellow but turn to that white fluff seed I think it is (that as a kid you'd blow and it's go everywhere).no idea with the third plant?