You'll need a portion of the stem with a node.

If it is a true lipstick--i.e. aeschynanthus species or cultivar it will root from a leaf. But, that is a very slow proposition and must be done just right--rooted in a medium like long fiber moss or a mix of perlite/vermiculite, enclosed in a ziplock bag and grown with good light such as on a light stand. The leaf will root and then after a fairly long time, send up a new shoot. It will need a light feeding after rooting for the leaf to gain the strength to send up a shoot.

I just gave this info for the sake of accuracy. But, growing from leaves is rarely useful with aeschynanthus. A cutting with a node will be much faster and easier. I have rooted leaves under less than ideal circumstances and had the leaves sit for two years before finally dying without issue. Other gesneriads which some mass growers call lipsticks are other genera of gesneriads, which will not root from leaf cuttings (i.e. columnea or nematanthus).

Jon

I have successfully rooted several leaves, they are however yet to send up a shoot. I did it merely out of curiosity and because I didn't want to just chuck the leaves I removed from the bottom of my cutting. They took about 2 months to root but are now fully rooted so I'll just wait and see 😊

Eniko how did you do it?