Vast group of vegetables. As with all cross reactivity, allergy is not automatic but being allergic to one or more increases the chance you will be allergic to another.

• Tomato – but see also salicylate intolerance
• Aubergine – can contain histamine like chemicals!
• Bell pepper (capsicum) – from which you get the spice paprika, often used in other things eg salami, pepperoni
• Chilli pepper
• Potato (but not sweet potato). Raw potato is sometimes the problem (contact, obviously) rather than cooked.