Cactus / Astrophytum asterias

Today's note is not about Ariocarpus, is Astrophytum asterias f red flower.
Normal asterias flower is yellow color.
Astrophytum is in flower in spring normally but this plant is in flower in autumn.
It was hard to get true red flower seeds. I started to buy red flower seeds from 2003 and bought every year but almost all plants were in flowers with not true red, apricot color. I bought seeds in 2007 also and found only one plant showed a true red. I assume this red color gene is quite positive and the stigma is also red color.
Unfortunately this plant can not make seeds becuse of the abnormal stigma.