I find that various Mexican species or hybrids respond to different stimuli for producing their winter-form leaves and/or for initiating flowers.
I am saying that winter-form leaves are not hybernacula, though the plants are producing differently shaped leaves, they never stop growing, hence they are not dormant. Most will change their leaf form despite temperature, photoperiod, or moisture levels. A few will respond to a 24 hour/day photoperiod and plenty of moisture by remaining in summer-form leaf.
I am saying that winter-form leaves are not hybernacula, though the plants are producing differently shaped leaves, they never stop growing, hence they are not dormant. Most will change their leaf form despite temperature, photoperiod, or moisture levels. A few will respond to a 24 hour/day photoperiod and plenty of moisture by remaining in summer-form leaf.