Blooming cactus - 5 year old Lobivia

I was waiting for almost 5 years to see this flower.
And now that the time has finally come, the weather sucks and it doesn't want to open fully. It has been trying for the past 3 days and today I finally decided to shoot it. I don't expect it to last much longer, so I didn't want to miss the chance.

I don't have a name for it as I got a mix of seeds with no cactus ID on it. I am guessing it is a Lobivia. And that is as far as I will go.

Lobivia no ID

Let's start from the start :)
Almost 5 years ago on one of the FB cactus forums someone wanted to give away cactus seeds. I had absolutely no experience sowing them, and not much experience growing them either. But what the hell! I want some!
Quick agreement and the pack of seeds was sent to my address. I was told it is a mix with all kinds of type (that is true). But nothing specific.

I sowed some of them in summer 2016 and the long waiting begun.
Since that was also my first time growing cacti from seeds I killed so many of them! Some were already 2-3 years old and had different corpuses... so that is a bummer. I will never know what they were.

This is how sprouting cacti look like. Those little buttons are about 2mm across. It will take them about a year to reach a pea size.

Two years ago it was still growing in one of those little 5cm orange pots.
Later it was moved to the larger black one.

Until this year :)
This year some of them FINALLY decided to bloom! To be honest I am a little bit disappointed with the flower as I like more pronounced colours (this one seem a bit washed out), but it still a very special one.
Maybe if it opened properly I would also like it more.

There is another tiny bud that I hope will develop well and maybe then the flower will show its full glory.

My other blooming cacti:

Chamaecereus hybrid	Sulcorebutia Canigueralii	Mammillaria camptotricha	Mammillaria Glassii
Gymnocalycium baldianum	Mediolobivia mudanensis	Lobivia Arachnacantha	Rebutia hybrid
Mammillaria Bombycina	Mammillaria Gracilis Snowcap	Mammillaria haageana	Mammillaria backebergiana
Chamaecereus silvestrii	Mammillaria prolifera	Rebutia Fabrisii var. Aureiflora	Lobivia Wrightiana
Aylostera Flavistyla FR756	Parodia concinna	Mammillaria Copper King	Gymnocalycium Bruchii
Mammillaria backebergiana	Gymnocalycium damsii	Echinopsis subdenudata	Rhipsalis pilocarpa
Mammillaria Prolifera	Lobivia arachnacantha v. vallegrandensis	Mediolobivia atrovirens	Mammillaria magnimamma
Sulcorebutia langerii	Sulcorebutia frankiana	Chamaelobivia no ID	Rebutia Albiflora
Mediolobivia atrovirens var. ritteri	Gymnocalycium damsii var. tucavocense	Notocactus Ottonis	Gymnocalycium Friedrichii
Turbinicarpus Viereckii	Rebutia neocumingii