Like all lilies, calochortus macrocarpus
is an attractive species; the pinkish-purple flowers have three triangular petals enclosing a light-colored center with a ring of fine yellow hairs and a pink glandular structure in the middle. Three narrow, protruding sepals grow underneath, displaced 60° from the petal tips. Stems are usually unbranched. The basal, grass-like leaves often wither by flowering time. Plants produce between 1 and 5 flowers. The undersides of each petal have a pale green stripe. Distribution is somewhat limited though the species is locally common, especially in central/east Oregon, and central/east Washington.