I would hazard a guess that the original yellow growth is a mineral deficiency and since being in your care that has been rectified through either repotting or watering. Personally I think that the yellow area detracts from the plant overall. If it was mine I would probably remove that stem low down...

I had thought that the name "romeo" was a valid one also. It is the proper name for "taurus", which seems to have been applied by a wholesaler at some point.

Last time I was up there, they had them for sale at cactusland nursery in bourne, he has a webshop too. Not cheap though.

This is always frustrating, I have two variegated Mammillaria giselae from the same batch of seed. One is evenly variegated and growing very nicely but the other is in blocks. The second seems to be being overcome by the variegation as it grows. At least cacti can be grafted though. Fingers crossed ...

I second that ralph, definitely on my wants list too.

I like CactusWorld

I'm not convinced that number 7 isn't a Matucana madisonorium. I think I see hair at the areoles, perhaps buds that never got started. But it is heavily marked, possibly by mites at some point.

Thanks tina, reminds me I need to put a little bag over it before it pops.

Anyone know if E. globosa is self fertile? My plant has produced a seed capsule but I don't grow any other euphorbias let alone another globosa. I intend to sow any seed just to see what grows anyway.

My two pelecyphora strobiliformis seem to alternate, just as a flower or two fade on one, the others buds open. Just as THOSE fade, the other opens some more. Swear they do it to me on purpose....