Authors: Phil.
Decumbent to ascending perennial 3-10cm tall, with one to several tufted rosettes. Basal leaves olive-green, hairless, trifid, 7-15mm by 1- 2.5cm, with obovate to elliptic segments, the lateral pair usually subdivided to the base into two, making five leaflets in all, these each tipped with three to seven irregular rounded lobes. Petioles 2- 7cm long, those at the base with small stipules, those on the lower stems notably shorter; upper cauline leaves much reduced and subsessile. Each rosette produces two to six scapes up to 15cm long, terminating in an eight to fourteen-flowered main umbel of small, yellow flowers, usually flanked by two similar or smaller umbels on short branches, summer in the wild. Chile and Argentina, the southern central cordilleras to Andean mid-Patagonia, typically in fields, rocky slopes of alpine steppe, loose cinder ash slides and scree, at 1600-2800m. H. boelkii, 1.5-5cm tall, has seven to twenty-one greenish to purplish flowers per umbel on very short pedicels, leaves with more prominent stipules and more slender and pointed leaflets. H. burkhartii, 3- 7cm high, also has greenish or purplish flowers, but no more than four to ten per umbel, and densely ciliate foliage. Both these species have a much more restricted distribution and are found only in the southern lake and volcano region.
