Question: What do Succisa and Symphytum have in common?

Context paragraphs:
Scabiosa: Scabiosa is a genus in the honeysuckle family (Caprifoliaceae) of flowering plants.  Many of the species in this genus have common names that include the word scabious; however some plants commonly known as scabious are currently classified in related genera such as "Knautia" and "Succisa"; at least some of these were formerly placed in "Scabiosa".  Another common name for members of this genus is pincushion flowers.

Symphytum asperum: Symphytum asperum is a flowering plant of the genus "Symphytum" in the family Boraginaceae.  Common names include rough comfrey and prickly comfrey.  It is native to Asia and it is known in Europe and North America as an introduced species and sometimes a weed.

Succisa: Succisa is a genus of flowering plants in the Caprifoliaceae family.

Symphytum officinale: Symphytum officinale is a perennial flowering plant of the genus "Symphytum" in the family Boraginaceae.  Along with thirty four other species of "Symphytum", it is known as comfrey.  To differentiate it from other members of the genus "Symphytum", this species is known as common comfrey or true comfrey.  Other English names include Quaker comfrey, cultivated comfrey, boneset, knitbone, consound, and slippery-root.  It is native to Europe and it is known elsewhere, including North America, as an introduced species and sometimes a weed.  The flowers are mostly visited by bumblebees.

Symphytum: Symphytum is a genus of flowering plants in the family Boraginaceae.  Its species are known by the common name comfrey.  There are up to 35 known species.  Some species and hybrids, particularly "S. officinale" and "S." × "uplandicum", are used in gardening and herbal medicine.

Symphytum bulbosum: Symphytum bulbosum, common name bulbous comfrey, is a flowering plant of the genus "Symphytum" in the family Boraginaceae.

Comfrey: Comfrey (also comphrey) is a common name for plants in the genus "Symphytum".  Comfrey species are important herbs in organic gardening.  It is used as a fertilizer and as an herbal medicine.  The most commonly used species is Russian comfrey "Symphytum" × "uplandicum", which is a cross or hybrid of "Symphytum officinale" (common comfrey) and "Symphytum asperum" (rough comfrey).

Supporting paragraphs: Succisa Symphytum
Answer: genus of flowering plants