Delonix is a genus of flowering plants in the pea family, Fabaceae, subfamily Caesalpinioideae.
 It contains trees that are native to Madagascar and east Africa.
 By far the best known species is the Royal Poinciana ("D. regia").
Bossiaea cinerea, commonly known as showy bossiaea, is a species of flowering plant in the pea family, Fabaceae.
 It is a hairy-stemmed shrub growing up to 2 m in height and spread.
 Its triangular, stalkless leaves are alternate, opposite or whorled and 5–20 mm long.
 Its red and yellow pea flowers are 7–12 mm long and grow singly along the stems; the seed pods are ovate to oblong and 10–20 mm long.
 It is found in sandy coastal heath and sclerophyll forest habitats.
Bossiaea scolopendria, known as the Plank Plant is a species of flowering plant in the pea family (Fabaceae) found in eastern Australia.
 An erect shrub up to a metre tall.
Chorizema cordatum, known as the heart-leaf flame pea or Australian flame pea, is a flowering plant of the pea family, endemic to gravelly or loamy soils in eucalyptus forests, in the moist south western parts of Western Australia.
 The Noongar peoples know the plant as Kaly.
Bossiaea walkeri, also known as cactus bossiaea or cactus pea, is a species of flowering plant in the pea family (Fabaceae).
 It is a leafless shrub that grows to between 0.5 and 2.5 metres high.
 Red flowers are produced between July and November in the species native range.
 It occurs in Western Australia, South Australia, Victoria and New South Wales.
Bossiaea rhombifolia, is a species of flowering plant in the pea family found in eastern Australia.
 An upright shrub to two metres tall.
 Branches are hairless and mostly flat, particularly when young.
 A most attractive plant when in full flower.
Alfalfa , Medicago sativa also called lucerne, is a perennial flowering plant in the pea family Fabaceae cultivated as an important forage crop in many countries around the world.
 It is used for grazing, hay, and silage, as well as a green manure and cover crop.
 The name alfalfa is used in North America.
 The name lucerne is the more commonly used name in the United Kingdom, South Africa, Australia, and New Zealand.
 The plant superficially resembles clover (a cousin in the same family), especially while young, when trifoliate leaves comprising round leaflets predominate.
 Later in maturity, leaflets are elongated.
 It has clusters of small purple flowers followed by fruits spiralled in 2 to 3 turns containing 10–20 seeds.
 Alfalfa is native to warmer temperate climates.
 It has been cultivated as livestock fodder since at least the era of the ancient Greeks and Romans.
 Alfalfa sprouts are a common ingredient in dishes made in South Indian cuisine.
Barbarea (winter cress or yellow rocket) is a genus of about 22 species of flowering plants in the family Brassicaceae, native to temperate regions of the Northern Hemisphere, with the highest species diversity in southern Europe and southwest Asia.
 They are small herbaceous biennial or perennial plants with dark green, deeply lobed leaves and yellow flowers with four petals.
Tetrapleura tetraptera is a species of flowering plant in the pea family native to Western Africa.
 The plant is called "Prekese" (or, more correctly, "Prɛkɛsɛ") in the Twi language of Ghana.
It is also called Uhio (Uhiokrihio) in the Igbo Language of Nigeria,
Hardenbergia violacea syn.
 "H. monophylla" is a species of flowering plant in the pea family Fabaceae, native to Australia from Queensland to Tasmania.
 It is known in Australia by the common names false sarsaparilla, purple coral pea, happy wanderer, native lilac and waraburra (which comes from the Kattang language).
 Elsewhere it is also called vine lilac or lilac vine.

Question: Which flowering plant is in the pea family, Barbarea or Delonix?
Answer: Delonix