Allium achaium is a plant species endemic to Greece. Allium achaium produces egg-shaped bulbs up to 25 mm long. Scape is up to 30 cm tall, round in cross-section, erect, about 5 mm across. Leaves are about the same length as the scape, 3 mm wide. Umbel has up to 45 flowers, the pedicels unequal in length. Flowers are bell-shaped, pale yellow tinged with pink. Anthers are yellow, ovary green.