Tendrillar stipules occur in

Pollinia are sac like structures

When the apex is pointed, hard and sharp like a spine as in Date Palm, it is called

Rachis is modified into a leafy structure called

Caruncle in castor seeds helps in

In Acacia species, the first few leaves are pinnately compound. Then there are leaves with flattened petiole and fewer pinnae. The leaves of adult plant has parallel veined flattened petiole and no pinnae. It shows that