Belladona is obtained from
Atropa
Atropa is the genus of flowering plants belonging to family Solanaceae. It includes tall, calciphyte (thrives in lime-rich soil), herbaceous perennials, bearing large leaves and glossy berries which is dangerous due to its high toxicity. Atropa belladonna, commonly known as belladonna is a perennial herbaceous plant. Belladonna contains tropane alkaloids. It is used as a cosmetic, medicinal purpose etc. Hence, belladonna is obtained from Atropa. So, the correct answer is 'Atropa'.