Tomato (seedling)Lycopersicon esculentum “Fleischtomate, kartoffelblättrige, Tiefgefurchte” german heirloom

Sometimes a tomato variety is labeled “potato-leaved”. A first it sounds a bit weird, but as soom as you see the leaves you get used to the expression. Tomato and potato are relatives belonging to the nightshades, and share the disease late blight. Keep them well apart in the garden, as the potatoes are likely to infect the tomatoes (as far as I know not the opposite direction).
One might think potato-leaved tomato is a result of genetic engineering, but in fact its a pure tomato of a rather primitive type as seen in the flowers. The stigma protrudes from the anther “barrel”, seriosly increasing the risk of having a cross with another tomato variety. Look out for signs of a cross in new generations. If I find signs of a cross, I look into my seedbox and find seeds two or more generations older. These old seeds are before the cross happened, and this is a reason to keep your old seeds for many years. Tomato seeds are very longlasting in the seedbox. On the other hand, taking seeds from plants showing signs of crossing is a new variety in making.

Seedlings with normal leafs to compare:

Red beef tomato (seedling)Lycopersicon esculentum ‘Virovskij Skorospelij’

Black cherry tomato (seedling)Lycopersicon esculentum ‘Black Cherry’