Tribulus maropterus  

Arabic Name : Zahr , Qayoob , Qatoob Prostrate or decumbent , woody - based subshrub . Stem and leaves villous with short appressed and long erect hairs . Larger leaves 2.5-5 cm long ; smaller leaves 0.8-1.2 cm long ; leaflets 4 - 6 x 2 - 3 mm , oblong - elliptic , widely spaced or imbricate , apiculate ; stipules 2 - 4 mm long , ovate to broadly - ovate , sub - caducous . Pedicel equal to or longer than the subtending leaf . Sepals sericeous , 5 - 8 x 1.5 2 mm , lanceolate , acute . Petals 1 - 1.75 x 0.5-1 cm , obovate , pale to bright yellow . Stamens 10 , sometimes 8 or 9. Ovary densely hairy , with straight hairs ; style 0.5 - 1.25 mm long ; stigma 1-3 mm long , linear cylindrical . Fruit 1 - 1.5 cm wide , densely hairy between the wings ; wings 7- 10 x 3-5 mm , subentire , or dentate or deeply divided . Seeds 1-3 ( in our material ) , 3-6 x 0.75-1 mm .