What is the name of a small water-filled cavity in a terrestrial plant?

much more than I wanted to know, but interesting Breeding grounds for mosquitoes 🦟!

wish I didn't know that lovely heliconias provide comfortable breeding space for malaria and dengue carrying mosquitos, rather spoils their beauty.

Many species of South American dart frog tadpoles develop into frogs in water-filled bromelaid leaf axils.

These are some weird & difficult questions tonight. Sounds like something from outer space! 🙄