Spigelia is a genus of flowering plants in the family Loganiaceae.
 It contains around 60 species, distributed over the warmer parts of the Americas, from the latitude of Buenos Aires to the Southern United States.
 It was named after Adriaan van den Spiegel (Adrianus Spigelius) by Carl Linnaeus in his 1753 "Species Plantarum"; the type species is "Spigelia anthelmia".
 Pinkroot is a common name for plants in this genus.
Sinningia speciosa, commonly known in the horticultural trade as Gloxinia, is a tuberous member of the flowering plant family Gesneriaceae.
 The common name has persisted since its original introduction to cultivation from Brazil in 1817 as "Gloxinia speciosa".
 The name florist's gloxinia is sometimes used to distinguish it from the rhizomatous species now included in the genus "Gloxinia".
 Another common name is Brazilian gloxinia.
 The plants produce large, velvety, brightly colored flowers and are popular houseplants.
 Cultural requirements are similar to those of African violets except that "S. speciosa" generally requires more light and often has a dormant period, when the tuber should be kept cool and dry until it resprouts.
Foliar nematodes are plant parasitic roundworms in the genus "Aphelenchoides".
 The three most economically important species are "Aphelenchoides fragariae", "A. ritzemabosi", and "A. besseyi".
 Foliar nematodes are becoming a widespread and serious problem for the ornamental and nursery industries.
 "A. fragariae" causes damage on hundreds of different plants including chrysanthemum, begonia, gloxinia, African violet, cyclamen, and a wide variety of bedding plants and ferns, causing brown to black, vein-delimited lesions on leaf tissue, defoliation, and possible stunting of plants.
Incarvillea is a genus of about 16 species of flowering plants in the family Bignoniaceae, native to central and eastern Asia, with most of the species growing at high altitudes in the Himalaya and Tibet.
 The most familiar species is "Incarvillea delavayi", a garden plant commonly known as hardy gloxinia or Chinese trumpet flower.
 Unlike most other members of Bignoniaceae, which are mainly tropical woody plants, species of "Incarvillea" are herbs from temperate regions.
Gloxinia is a genus of three species of tropical rhizomatous herbs in the flowering plant family Gesneriaceae.
 The species are primarily found in the Andes of South America but "Gloxinia perennis" is also found in Central America and the West Indies, where it has probably escaped from cultivation.

Question: Are both Gloxinia and Spigelia genus of plants?
Answer: yes