I would like to know what kind of plant this is. I grew it from seed I brought from a trip to Eastern Africa and all I remember is that I extracted the seed from some kind of fruit... Any ideas?
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I am far from certain but the first thing that sprung to my mind was Physalis peruviana (Cape gooseberry), though the photos i've found online are not conclusive.
Your plant's leaves are quite similar to young leaves of Cape Gooseberry, notably the general shape and venation. Below is a picture of a young plant from my garden.
The fine hairs give a velvety feeling to the touch. In older plants the leaves are clearly crenelated but this feature is less prominent or absent in seedlings from my experience. Nevertheless hints of crenelation are visible on the bottom left leaf of second photo.
Although native from South America Physalis peruviana is of economic importance in East Africa and the fruit is edible.
There are some differences with your specimen, such as the stalk and leaf color, the leaf tip seems to be quite variable from broad to narowly tapered (like yours). Not sure if this is due to growing conditions (low sunlight?), age or simply wrong identification.
If it is a Cape Gooseberry, i'm sure you'll enjoy the fruits!
Compare with Solanum betaceum (Tamarillo)