Acis longifolia is a species of flowering plant in the family Amaryllidaceae, endemic to Corsica.

The flowers are 8–11 mm long, with tepals lacking points at the end and styles shorter than the stamens.

[1] In 2004, it was transferred back to Acis, along with other species of Leucojum, on the basis of a molecular phylogenetic study.

[4] Acis longifolia is endemic to Corsica, where it is found among rocks and on mountain slopes up to about 500 m in elevation, often in partly shaded conditions.

[2] Acis longifolia is rare in cultivation; it is not fully hardy, requiring protection in cold area, such as in an alpine house or bulb frame.