Name this plant

Calling all gardeners! Can anyone tell me what this plant is:

I went for a walk in a friend's beautiful garden on Friday, 

and she has this lime green lovely planted in some shade. 

She says it is a perhaps a type of may bush?

Can you name this plant? Specimen #3

I spotted this beautiful tree while taking the kids to school this morning. I have no idea what it is, but it is spectacular.

The most wonderful pink panicles, so pretty.

A small, neat tree.

Really hoping someone knows what this is because I think I NEED one!

Thank you to Gina, all the way from South Wales and Fran in Tasmania for identifying Specimen #2 as the Judas Tree (Cercis siliquastrum). Horicultual hero points to you both!

Can you name this plant? Specimen #2

Genius points to my lovely friend Belinda who identified Specimen #1 as Iris Japonica or 'Poor Man's Orchid'. The leaves are so different to any other iris I have seen.  I wonder if she will know what this is: Small tree, lilac pea-like flowers, prolific seed pods dangling from the branches, heart-shaped leaves.

I confess I found one of these in flower in a nursery today, so now know what it is, but I will test to see how clever you all are anyway!

Can you name this plant? Specimen #1

OK, all you cool climate gardeners out there - I need your help to identify some plants I found at the Botanic Gardens earlier in the week. Any ideas what this is?

It looks like some sort of orchid (?), knee-high with strappy leaves. Very delicate & pretty.

I have a few 'mystery-to-me' plants that I will post over the next few days. I'm afraid there are no amazing rewards for being clever enough to identify these - just the simple pleasure of discovering that you know something that someone else doesn't!!