Cultivars
'Cupreum'
This perennial is similar to the species and grows to 300 mm (12 in) tall. During mid-spring it produces coppery-red flowers and is suitable for USDA zones 5-9.

'Neosulphureum'
This perennial is similar to the species and grows to 300 mm (12 in) tall with bronze coloured new growth in spring and produces numerious small yellow flowers in an upright raceme during mid-spring. It is suitable for USDA zones 5-9.

'Sulphureum'
This perennial is similar to the species and grows to 300 mm (12 in) tall forming a dense mounded habit. It has mottled bronze-green foliage and produces yellow flowers on an upright raceme during mid-spring. It is suitable for USDA zones 5-9.