Astrantia minor, the lesser masterwort,[3] is a species of herbaceous plant belonging to the family of Apiaceae.

The flowers are 30-40 per umbel, of the same length or slightly shorter than the bracts, generally hermaphroditic in the centre and male peripherally.

Calices have teeth about 1 mm in size, ovate-oblong, subobtuse and slightly bearded (1.5-2 times longer than wide).

It differs from its congener Astrantia major, by its smaller size, and basal leaves of seven segments (instead of five) with calyx teeth that are obtuse and slightly mucronate.

[5][6][7] Found in some clumps of large plants near streams and in clearings in the scrubland of mountain azalea (Rhododendron ferrugineum), on fresh alpine and subalpine soil.