The nightshades, family Solanaceae, are a diverse group of flowering plants within the order Solanales, encompassing approximately 90–100 genera and 2,500–3,000 species, including both herbaceous and woody forms. Members are characterized by typically alternate leaves, actinomorphic pentamerous flowers, and a superior ovary usually forming berries or capsules. Chemically, Solanaceae are notable for producing a variety of alkaloids, such as tropane, steroidal glycoalkaloids, and nicotine, which often have potent neuroactive or toxic properties. The family includes important model organisms and crops (e.g., Solanum, Capsicum, Nicotiana) widely used in plant genetics, physiology, and metabolic pathway research.
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