I wanted to share this rare sight with you because, well, the seedling could die any day. My attempts to grow Muiria hortenseae from seed so far were all more or less "is it dead yet?" I was sowing them 5 seeds at a time three times this year and the seedling below is the most I can show for it. The next sowing is scheduled for this fall and when I run out of seeds I will buy more and try again. I'm still far from giving up.
Anyway, this is how it went: The seeds germinate just fine (3 out of 5 mostly) and then they keep the cotyledons for months. I don't know whether this is how it is suppossed to be or the result of my conditions. Lithops seedings can keep their cotyledons for a long time too but depending on the species they are stronger, more resistent. In case of Muiria they are weeker and unfortunatelly wither before any true leaves can develop. The seedling below was sown in February (!) and is the only one that could develop first true leaves. This is the most success I've had with Muiria so far! The leaves have come out through its side and the cotyledons never dried off. Now it's lying on the side, using both leaf pairs, which is a clever thing to do because it makes it more succulent. For such a slow grower it seems to be important. It looks healthy and strong but it really is tiny and shows no signs of new growth. The root system is also quite fragile (yes, I had the courage to check). Now I just give it water from time to time and wait.