Histological characters of fruit of Tribulus terrestrisLinn. (1) Trichomes – wooly and glandular, (2) Epicarp cells showing anomocytic stomata, (3) Simple, circular starch grains, (4) Clusters of calcium oxalate crystals, (5) Endosperm cells containing oil globules, (6) Endosperm cells containing starch grains, (7) Xylem vessels with spiral thickening, (8) Endocarp cells with striated cuticle of testa, (9) Group of thin walled sclerenchymatous fibres, (10) Group of stone cells of mesocarp