Remember some time ago I made a post about that my adenium leaves would take the shape of a "taco", well here's what I have found out
At the beginning of the season when we started seeing the first hot temperatures around 90f my older adeniums would take the taco shape leaves but my new ones didn't, at that point I didn't see any difference between the ones that did and the ones that didn't, as the days past the ones that did it started going back to the normal form and the temperature was averaging 90f
As the season goes average temperature raises to the low 100's f ( as days pass maximum temperatures don't go 90, 91, 92.93, 94 etc they go 91, 92, 91, 93, 92, 102, 101, 103, 109, 108.111, 98, etc) my old ones did again the taco shape and the new ones didn't and they got burned especially my arabicum, this was back in late May
Last week we had another jump from the low 100's to the low 110's Every single of my plants did the taco shape and none got any single leaf burned
The 2 somalenses I have don't do this but they dont burn they seem more adapted to the heath.
What amazes me is the fact that they don't born with this "knowledge" they "learn" it
Here are some pics of my arabicum