My collection is almost complete! I had a heck of a time finding this. Rhubarb and Rose are either very unpopular or extremely popular colours, they're never there when I go looking for them. They only seem to be in certain Pricelines, and when I went to Myer to find them, I found out they haven't been in stock at Myer for about 6 months?!
You can read my review of the Lanolips performance and formula here, where I reviewed Apple and Dark Honey. Swatches of Sunshine and Lemonaid are here. TL;DR Lanolips are deliciously plush, nourishing glosses which are cruelty-free but not vegan-safe. They are SPF15 and due to the thick texture of the product, have a really annoying applicator.
Rhubarb is a soft medium pink.
After seeing all the pictures of Rose and Rhubarb together, I think Rose may actually be too light for me. I thought Rhubarb would be a much darker pink - I actually imagined Rose being this colour! This has taken the place of Dark Honey as my favourite Lanolips colour - it adds colour to my face and isn't prone to streaking/patchiness like Apples is. If you've never tried Lanolips Lip Ointment with Colour before, I'd actually suggest you start with this one.