I don't have a scientific reason, I suppose it is the same as why some leaf axils produce branches on trees and some do not ;-) Nice Opuntia though. Dan Lincoln, NE USDA 5
Well, on cacti the aeroles are the places from which leaves, flowers and stems arise. Of course the leaves are replaced with spines, tho Pereskias and some opuntias do have leaves too, those of Opuntia (leaf primordia)dropping off soon after emerging.
Thank you all for your kind follow-up. Do you know the species of this Opuntia? I guess O. subulata, monstruose form, not sure though. Here is another view: {{gwi:465971}} Davide
cactusdan19
greenlarry
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