Al, that is the highly desirable Echeveria gibbiflora hybrid 'Mt. Etna'. I have three of these heavily carunculated plants.

Observation over the last two years has clearly shown a correlation between light levels and the development of carunculations. A bright shady location will produce a lightly carunculated leaf with little of the outrageous color development that can occur with a few hours of direct sun each day. You can see that on some of the less carunculated lower leaves of the plants in the photo below.

Since moving the plants to their current location which gets a few hours of direct sun each day, the carunculations completely cover each leaf on the upper part of the plants. You can burn these plants with too much direct sun, so finding the right location at the right time of year seems to be very important. Cooler temperatures seem to play the major role in developing rich color.

The larger ones in the background and are in 14 inch tall pots to counterbalance their incredible weight. They each stand about 16 inches above the pot, and both have very long curved stems over two feet long and propped up by large rocks. They are due for beheading come February, or sooner if they try to commit suicide ;)

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that Is a big difference!

i have a unid'ed plant that looks virtually identical to the plant in the pic on the left - but no caruncles. i picked it up at the local c&s soc show last spring but have never seen another. could it be this is one parent to your hybrid? any idea on the name of it?
will do a search for para's e.gibbiflora -
thanks for sharing your 'experiement'.
jo

Many thanks for your growing tips, Para. You have some unbelievably beautiful specimens.

Al