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This website is about Tribulus terrestris, goat head or also affectionately nicknamed tackweed in the inland Northwest.

Tribulus terrestris, known as puncturevine or goat’s head, is a low-growing plant found in dry areas. It produces yellow flowers and distinctive spiny seed pods resembling goat heads. Considered a weed, its sharp seeds can puncture skin and tires. Despite some traditional medicinal uses, it’s notorious for rapid spreading and is managed through manual removal and herbicides.

Uses:

• Traditional Medicine: In some cultures, Tribulus terrestris has been used in traditional medicine for various purposes, including as an aphrodisiac and to boost testosterone levels.
• Supplements: Extracts from this plant are used in some dietary supplements for purported health benefits.

Appearance:

• Habitat: Often found in dry, arid climates and disturbed areas like roadsides, fields, and sandy soils.
• Size: It typically grows as a prostrate or spreading plant, forming dense mats on the ground.
• Leaves: Small, pinnately compound leaves with multiple leaflets arranged oppositely along the stem.
• Flowers: Yellow five-petaled flowers, usually about 1 cm in diameter, blooming throughout the warmer months.
• Fruit: Its most distinctive feature—hard, spiny seed pods that break into several segments when mature. These pods contain small seeds with sharp thorns or spines, resembling a goat’s head, hence the name.