Native Alpine Flora from Christchurch, New Zealand

From a 2019 set of six stamps showcasing the native alpine flora of New Zealand, the pair of stamps on this cover depict the Moss-dwelling forget-me-not (Myosotis bryonoma) on the left and the Mt Cook lily (Ranunculus lyallii) on the right. I think these are beautiful stamps. And the Christchurch postmark was perfectly applied.