Abelia is a genus of about 30 species and many hybrids in the honeysuckle family Caprifoliaceae.
 Some authors, including the Angiosperm Phylogeny Group, consider "Abelia" and related genera to belong instead in the segregate family Linnaeaceae, also including such genera as "Linnaea", "Abelia", "Dipelta", "Kolkwitzia", and "Zabelia", but not such others as "Lonicera" or "Symphoricarpos," included by them instead in a more narrowly viewed Caprifoliaceae.
A set (pitch set, pitch-class set, set class, set form, set genus, pitch collection) in music theory, as in mathematics and general parlance, is a collection of objects.
 In musical contexts the term is traditionally applied most often to collections of pitches or pitch-classes, but theorists have extended its use to other types of musical entities, so that one may speak of sets of durations or timbres, for example.
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.
Barbarea balcana (also known as Balkan yellow rocket) is a perennial herb of the genus "Barbarea" from the family Brassicaceae / Cruciferae that grows in wet spring areas.
A spotted fever is a type of tick-borne disease which presents on the skin.
 They are all caused by bacteria of the genus "Rickettsia".
 Typhus is a group of similar diseases also caused by "Rickettsia" bacteria, but spotted fevers and typhus are different clinical entities.
Barbarea vulgaris, also called bittercress, herb barbara, rocketcress, yellow rocketcress, winter rocket, and wound rocket, is a biennial herb of the genus "Barbarea", belonging to the mustard family.
Linnaea is a plant genus which has often been classified in the family Caprifoliaceae (the Honeysuckle family) but may be more accurately considered to belong to its own family, Linnaeaceae.
 The genus includes a single, generally boreal to subarctic woodland subshrub species, Linnaea borealis, commonly known as twinflower (sometimes written twin flower).
Barbarea australis is a morphologically and ecologically typical "Barbarea" species with an unusual distribution: it is an endemic and threatened species from Tasmania.
 The leaves have a large end-lobe and only few side lobes, much like the leaf-shape of "Barbarea stricta" and "Barbarea orthoceras".
 With regard to defence chemicals (glucosinolates), it is similar to other members of the genus.

Question: Barbarea and Linnaea, are genus of which entities?
Answer: plants