Step 1: Understanding the Concept.
In pharmacognosy, "kino" refers to a dried, astringent juice or gum-resin exuded from certain trees when their bark is wounded, and Malabar kino specifically comes from Pterocarpus marsupium.
Step 2: Key Approach.
Identify the plant family of Pterocarpus marsupium by its growth form and flower type, then compare that against the four listed families.
Step 3: Detailed Explanation.
Pterocarpus marsupium is a large deciduous tree that produces pea-like flowers and flattened, winged pods, both classic features of the legume family.
Asteraceae plants form composite flower heads, Rosaceae plants are typically fruit-bearing trees with five-petaled flowers, and Liliaceae plants are bulb-forming monocots, none of which describe a legume tree.
Because the tree's pod and flower structure matches the legume pattern exactly, it is classified in the family also known as Fabaceae.
Step 4: Final Answer.
The dried juice of Pterocarpus marsupium belongs to the family Leguminosae.