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IN OPUNTIA PLANTS LEAVES ARE REDUCED TO SPINES .WHAT IS THE NAME OF THIS STRUCTURE?WHAT ABOUT AUSTRALIAN ACCACIA?
They are called glochids.In many Australian and Pacific species, the leaflets are suppressed or absent altogether, and the leafstalks (petioles) are flattened and perform the physiological functions of leaves. The leafstalks may be vertically arranged and bear thorns or sharp spines at their base. Acacias are also distinguished by their small, often fragrant flowers, which are arranged in compact globular or cylindrical clusters. The flowers are usually yellow but occasionally white and have many stamens apiece, giving each one a fuzzy appearance.


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