Rudbeckia californica is a species of flowering plant in the Sunflower or Aster Family (Asteraceae), known by the common name California coneflower.
Rudbeckia is a plant genus in the sunflower family.
 The species are commonly called coneflowers and black-eyed-susans; all are native to North America and many species are cultivated in gardens for their showy yellow or gold flower heads.
Wedelia is a flowering plant genus in the sunflower family.
 They are one of the genera commonly called "creeping-oxeyes".
Schizoptera is a plant genus in the sunflower family.
Securinega is a genus of plants in the family Phyllanthaceae, first described as a genus in 1789.
 As presently conceived, the genus is native to Madagascar and the Mascarene Islands in the Indian Ocean.
 In the past, it was considered to be much more widespread, thus explaining the long list of species formerly included.
Rudbeckia hirta, commonly called black-eyed-Susan, is a North American flowering plant in the sunflower family, native to Eastern and Central North America and naturalized in the Western part of the continent as well as in China.
 It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States.
Scorzonera hispanica, black salsify or Spanish salsify, also known as black oyster plant, serpent root, viper's herb, viper's grass or simply scorzonera, is a perennial member of the genus "Scorzonera" in the sunflower family (Asteraceae), cultivated as a root vegetable in the same way as purple salsify ("Tragopogon porrifolius"), also in the sunflower family.
Helianthus annuus, the common sunflower, is a large annual forb of the genus "Helianthus" grown as a crop for its edible oil and edible fruits (sunflower seeds).
 This sunflower species is also used as bird food, as livestock forage (as a meal or a silage plant), and in some industrial applications.
 The plant was first domesticated in the Americas.
 Wild "Helianthus annuus" is a widely branched annual plant with many flower heads.
 The domestic sunflower, however, often possesses only a single large inflorescence (flower head) atop an unbranched stem.
 The name "sunflower" may derive from the flower's head's shape, which resembles the sun, or from the impression that the blooming plant appears to slowly turn its flower towards the sun as the latter moves across the sky on a daily basis.
Helianthus petiolaris is a North American plant species in the sunflower family, commonly known as the prairie sunflower or lesser sunflower.
 Naturalist and botanist Thomas Nuttall was the first to describe the prairie sunflower in 1821.
 The word "petiolaris" in Latin means, “having a petiole”.
 The originated in western United States, but has since expanded east.
 The prairie sunflower is considered a be a weed.
Lecocarpus is a plant genus in the "sunflower family", native to Galápagos Islands, part of Ecuador.

Question: Which plant genus, Rudbeckia or Securinega, is in the sunflower family?
Answer: Rudbeckia