Life (root) » Plantae (plants) » Tracheophyta (Vascular Plants) » Angiospermae (Flowering Plants) » Magnoliopsida (Dicots) » Solanales (nightshades, bindweeds, gooseweeds, and allies) » Solanaceae (nightshade family) » Nicotianoideae (tobacco and allies) » Nicotiana (tobacco) » Nicotiana glauca (tree tobacco)