Question: What does Rubus and Ajania have in common?

Context articles: Rubus hawaiensis
Rubus illecebrosus
Rubus chamaemorus
Rubus occidentalis
Ajania
Rubus
Rubus ulmifolius
Rubus baileyanus
Rubus deamii
Marionberry

Rubus hawaiensis, also called the ʻ Ākala, is one of two species (with "R. macraei") commonly known as Hawaiian raspberry, endemic to Hawaii.
 It is found on the islands of Kauaʻ i, Molokaʻ i, Maui, O'ahu, and Hawaiʻ i in mesic to wet forest at elevations of 600 - .
 In most areas it is not very common, but in some places (such as the upper Koʻ olau Gap in Haleakalā and Laupāhoehoe Natural Area Reserve) it can be a dominant member of the understory vegetation.
 Although superficially similar to the other Hawaiian species, "Rubus macraei", the two are believed to be derived from separate dispersals to Hawaii.
Rubus illecebrosus is a red-fruited species of "Rubus" that originally came from Japan, but is also very popular in some European countries like Lithuania.
 Common names include balloon berry and strawberry raspberry.
 It has become sparingly naturalized in scattered locations in Canada, the United States, and South America.
Rubus chamaemorus is a rhizomatous herb native to cool temperate, alpine, arctic tundra and boreal forest, producing amber-colored edible fruit similar to the raspberry or blackberry.
 English common names include cloudberry, bakeapple (in Newfoundland and Labrador), knotberry and knoutberry (in England), aqpik or low-bush salmonberry (in Alaska - not to be confused with true salmonberry, "Rubus spectabilis"), and averin or evron (in Scotland).
Rubus occidentalis is a species of "Rubus" native to eastern North America.
 Its common name black raspberry is shared with the closely related western American species "Rubus leucodermis".
 Other names occasionally used include wild black raspberry, black caps, black cap raspberry, thimbleberry, and scotch cap.
Ajania is a genus of flowering plants in the daisy family, described as a genus in 1955.
Rubus is a large and diverse genus of flowering plants in the rose family, Rosaceae, subfamily Rosoideae, with 250–700 species.
Rubus ulmifolius is a species of wild blackberry known by the English common name elmleaf blackberry or thornless blackberry and the Spanish common name zarzamora.
 It is native to Europe and North Africa, and has also become naturalized in parts of the United States (especially California), Australia, and southern South America.
Rubus baileyanus, common name Bailey's dewberry, is an uncommon North American species of flowering plant in the rose family.
 It is found in scattered locations in central Canada and in the eastern and north-central United States, primarily in the Appalachian Mountains.
 Its range extends from Massachusetts, Ontario, and Minnesota south as far as Missouri, Tennessee, and North Carolina, though it is not common in any of those places.
Rubus deamii, common name Deam's dewberry, is an uncommon North American species of flowering plant in the rose family.
 It grows in scattered locations in the east-central United States and southern Canada, from Ontario south to Missouri, Tennessee, and West Virginia, but nowhere is it very common.
The 'Marion' cultivar ("Rubus L." subgenus "Rubus") or Marion blackberry, marketed as    , is a blackberry developed by the USDA ARS breeding program in cooperation with Oregon State University.
 It is a cross between the 'Chehalem' and 'Olallie' blackberries.
 The marionberry is currently the most common blackberry cultivar, accounting for over half of all blackberries produced in Oregon.