About Hieracium horridum Fr.
Hieracium horridum Fr. is a hairy plant that reaches heights of 4 inches (10 cm) to 15 inches (38 cm). It bears oblong leaves along its stems, and at the top of each stem it has 11 to 12 bright yellow flower heads. Each flower head measures 0.315 inches (8 mm) to 0.354 inches (9 mm) in diameter. This species flowers between late June and August. Like all members of the Asteraceae family, the structures we call flowers in this plant are actually composite heads of many individual florets, each made up of a ray corolla with its own stamen. As is true for other members of the Cichorieae tribe, the stems and leaves of Hieracium horridum release a milky substance when broken. Hieracium horridum grows in dry rocky locations in mountainous coniferous forests. Its distribution covers Oregon, California, and Nevada, at elevations ranging from 5,000 feet (1,524 m) to 12,000 feet (3,658 m).
