Question: Are Buckinghamia and Aronia both a genus of shrubs?

Context articles: Aronia arbutifolia
Photinia
Gerrardina
Corokia
Aronia
Aronia prunifolia
Dryandra moth
Buckinghamia
Asteropeia
Aronia melanocarpa

Aronia arbutifolia, called the red chokeberry, is a North American species of shrubs in the rose family.
 It is native to eastern Canada and to the eastern and central United States, from eastern Texas to Nova Scotia inland to Ontario, Ohio, Kentucky, and Oklahoma.
Photinia ( ) is a genus of about 40–60 species of small trees and large shrubs, but the taxonomy has recently varied greatly, with the genera "Heteromeles", "Stranvaesia" and "Aronia" sometimes included in "Photinia".
Gerrardina is a genus of two species of trees, shrubs, and scrambling shrubs found in southeastern Africa.
 Until recently, the genus was placed in the polyphyletic family Flacourtiaceae, but it was abnormal there due to its apical placentation, small embryos, and mucilaginous foliar epidermis.
 Analyses of DNA data indicated that the genus did not fit in any known plant family and not clearly in any then-recognized order, and a new family, Gerrardinaceae, was thus created for it.
 Later analyses of additional DNA data and data from wood anatomy indicated that the family should be placed in the order Huerteales.
Corokia is a genus in the Argophyllaceae family comprising about ten species native to New Zealand and one native to Australia.
 "Corokia" species are shrubs or small trees with zigzagging (divaricating) branches.
 In fact, "Corokia cotoneaster" is commonly known as "wire-netting bush".
 The stems of the shrubs are dark when mature, covered with downy or silky hairs (tomentum) when young.
 In spring, they produce clusters of small, star shaped yellow blossoms.
 Berries are red or yellow.
 The shrubs prefer forests and rocky areas, sun or light shade, reasonably well drained soil, and moderate watering.
Aronia is a genus of deciduous shrubs, the chokeberries, in the family Rosaceae native to eastern North America and most commonly found in wet woods and swamps.
 The genus is usually considered to contain two or three species, one of which is naturalized in Europe.
 A fourth form that has long been cultivated under the name "Aronia" is now considered to be an intergeneric hybrid, "Sorbaronia mitschurinii".
Aronia prunifolia, called the purple chokeberry, is a North American species of shrubs in the rose family.
 It is native to eastern Canada and to the eastern and central United States, from Nova Scotia west to Ontario and Wisconsin, south as far as western South Carolina with an isolated population reported in southern Alabama.
The Dryandra moth ("Carthaea saturnioides") is a species of moth that is considered to be the sole member of the family Carthaeidae.
 Its closest relatives are the Saturniidae and it bears a resemblance to many species of that family, bearing prominent eye spots on all wings.
 The common name is derived from the "Dryandra" shrubs of the genus "Banksia", on which the larva of this species feed, and is hence restricted to the south-west of Western Australia where these shrubs grow.
 Other "Grevillea" shrubs may also be used as host plants.
Buckinghamia is a genus of only two known species of trees, belonging to the plant family Proteaceae.
 They grow naturally only (endemic) in the rainforests of the wet tropics region of north eastern Queensland, Australia.
 The ivory curl flower, "B. celsissima", is the well known, popular and widely cultivated species in gardens and parks, in eastern and southern mainland Australia, and additionally as street trees north from about Brisbane.
 The second species, "B. ferruginiflora", was only recently described in 1988.
Asteropeia is a genus of flowering plants.
 The genus contains 8 known species of shrubs and small trees, all endemic to Madagascar.
 It is the sole genus in family Asteropeiaceae.
 Members of the family are evergreen trees or shrubs.
Aronia melanocarpa, called the black chokeberry, is a species of shrubs in the rose family native to eastern North America, ranging from Canada to the central United States, from Newfoundland west to Ontario and Minnesota, south as far as Arkansas, Alabama, and Georgia.
 This plant has been introduced and is cultivated in Europe.