Pimpinella is a plant genus in the carrot family; it includes the aromatic herb anise "(P. anisum)".
Digitalis ( or ) is a genus of about 20 species of herbaceous perennials, shrubs, and biennials commonly called foxgloves.
Rehmannia elata (Chinese foxglove) is a species of flowering plant in the family Orobanchaceae, native to China.
 Growing to 150 cm tall by 50 cm broad, it is an herbaceous perennial with veined, hairy leaves and pink, tubular flowers with darker pink stripes in summer.
 The flowers bear a superficial resemblance to foxgloves, hence the common name "Chinese foxglove", which is also applied to the whole genus.
 However this species is not closely related to the true foxglove ("Digitalis").
Digitalis purpurea (foxglove, common foxglove, purple foxglove or lady's glove) is a species of flowering plant in the plantain family Scrophulariaceae, native to and widespread throughout most of temperate Europe.
 It is also naturalised in parts of North America and some other temperate regions.
 The plants are well known as the original source of the heart medicine digoxin (also called digitalis or digitalin).
Pimpinella cypria, common name Cyprus Burnet-saxifrage and locally Kıbrıs Pimpinela, is a herbaceous perennial plant belonging to the Carrot family (Apiaceae).
Digitalis laevigata, common name Grecian Foxglove or Giraffe Foxglove, is a species of flowering plant in the genus "Digitalis", in the family Plantaginaceae.
The health of American author Robert E. Howard (1906–1936), especially his mental health, has been the focus of the biographical and critical analysis of his life.
 In terms of physical health, Howard had a weak heart which he treated by taking digitalis.
 The precise nature of Howard's mental health has been much debated, both during his life and following his suicide.
 Three main points of view exists.
 Some have declared that Howard suffered from an Oedipus complex or similar mental disorder.
 Another viewpoint is that Howard suffered from major depressive disorder.
 The third view is that Howard had no disorders and his suicide was a common reaction to stress.
Pimpinella major, common name greater burnet-saxifrage or hollowstem burnet saxifrage, is a herbaceous perennial plant in the genus "Pimpinella" belonging to the carrot family (Apiaceae).
Lottia digitalis common name the "fingered limpet" or ribbed limpet, is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lottiidae.
 These limpets are usually found on the surface of rocks in the high intertidal region on the coastal fringes of the north east Pacific Ocean.

Question: what does Pimpinella and Digitalis have in common?
Answer: genus