The veinlet termini in several species of Medicosma Hook.f. and Flindersia R. Br. possess varied types of idioblasts : Brachytracheoids, Sclerotracheoids and terminal sclereids. In the light of details on the veinlet syndrome the group relationship among them have been examined. It is considered that varied types of idioblasts are due to different levels of specialisation. Taxonomic implications of veinlet elements are discussed.
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