Tribulus terrestris seeds

Annual herbs;
Stem: The stem is supine, with even-numbered pinnate leaves; leaflets are opposite;
Branches: Branches are 20-60 cm long, with even-numbered pinnate compound leaves, 1.5-5 cm long;
Leaves: Opposite leaflets, 3-8 pairs, oblong or obliquely round, 5-10 mm long, 2-5 mm wide, apex sharp or blunt, base slightly eccentric, pubescent, entire margin;
Flowers: Flowers axillary, pedicels shorter than leaves, yellow flowers; 5 sepals, persistent; 5 petals; 10 stamens, born at the base of the disc, with scale-like glands at the base, ovary with 5 ribs, stigma with 5 lobes, 3- in each cell 4 ovules; flowering period from May to August;
Fruit: The fruit has 5 divided fruit valves, hard, 4-6 mm long, hairless or hairy, with 2 sharp thorns on the middle edge, and often 2 small sharp thorns on the lower part, and often small tumors on the remaining parts; during the fruit period June-September;