A type of camassia but I do not know which species. Camassia leichtlinii and Camassia quamash are the ones I most commonly see for sale, but there are others. Here is a link that might be useful: camassia from van engelen

My Mysore has leaves with a pinkish underside. The Pitogo does not. The pitogo does have some pink in the leaf stem.

I second the Liatris spicata. Liatris scariosa is a significantly harder to find plant, and L. spicata has a much more compact raceme (flowering head). The one in the photo is way too compact to be anything but L. spicata. Also L. scariosa tends to be a much paler purple than L. spicata. The yellow flower looks like some sort of daylily, but there are thousands of sorts out there, so it'd be difficult to guess the cultivar name. BP

1. is a Hypericum species or cultivar. 2. is a Cistus species or cultivar. 3. is Santolina chamaecyparissus, Cotton Lavender. 4. is a variegated Euonymous cultivar 5. is a Spiraea cultivar. Am I right in thinking you are in the UK or Ireland?