Question: Vancouveria and Stigmaphyllon, are a type of what?

Context paragraphs:
Stigmaphyllon: Stigmaphyllon is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales.  Amazonvine is a common name for species in this genus.

Vancouveria: Vancouveria ( ) is a small group of plants belonging to the barberry family described as a genus in 1834.  The three plants in this genus are known generally as inside-out flowers, and they are endemic to the West Coast of the United States.  The genus was named after George Vancouver, English navigator and explorer.

Supporting paragraphs: Vancouveria Stigmaphyllon
Answer: plants