How long... Solved

[ralphrmartin]

Isn't nature wonderful!?

[Jim_Mercer]

They look like Monilaria seedlings.

Unlikely as I don't think I have any of those

Based on flowers seen so far this year the most likely parent is Trichodiadema rogersii

[Jim_Mercer]

Looking around my greenhouse another possibility is Phyllobolus tenuiflorus, second pair of leaves now open but I can't see any of the characteristic bristles for them to be the Trichodiadema that was my first guess

[Rika]

Delosperma

[Jim_Mercer]

Whatever they are they have survived the heatwave and now appear to be producing white flowers

[peter831shaw]

Mestoklema?

[Echinocactus123]

Mestoclema macrorhizzum?

[Jim_Mercer]

Mestoklema macrorhizzum?

That is probably it although the name on my old photograph is Delosperma napiforme - middle pot in picture looks like the pot that the seedlings appeared in so original plant must have died between 2012 and early this year

Not sure which plant provided the seed, or if an accidental bit of hybridising has taken place as the plants had different names on their lables;- Hartleyana - Napiforme - Sutherlandii

[Jim_Mercer]

Just had a look in my greenhouse and Delosperma napiforme is missing but the other two have survived and the one with the Delosperma Hartleyana label also has some seedlings in the pot - a bit purple as it has been in full sun

[Jim_Mercer]

Two months from seeing seedling to flowering!