Relatives of Heuchera

Darmera peltata (from cultivation):

Mitella pentandra (from cultivation):

Conimitella williamsii (from cultivation):

This species is unusual for the flowers—the lower flowers on the inflorescence are apetalous. This is apparent on numerous specimens, but apparently previous taxonomists assumed the petals were cauducous. The petals seem outsized for the plants, and are undivided as in occasional variants of Mitella stauropetala, its closest relative.

Tellima grandiflora (wild; developing inflorescence from cultivation):

Bensoniella oregona (wild):

Mitella stauropetala (from cultivation):

While a linear-petaled form is occasional in nature, this species tends to bloom this way in the greenhouse, especially on depauperate plants.

Boykinia occidentalis (wild):