Question: Ebony and Hatiora in what genuses
Context: Johnson Publishing Company, Inc. is an American publishing company founded in November 1942 by businessman John H. Johnson.  Headquartered at 200 S. Michigan Avenue in Chicago, Illinois, United States.  Led by its flagship publication, "Ebony", Johnson Publishing is the largest African-American-owned publishing firm in the United States.  Johnson Publishing Company also published "Jet" magazine, a weekly magazine from November 1951 until June 2014.  The company operates a book division, which has published books such as "The New Ebony Cookbook" and the more controversial "". The company produced the 1954 film "The Secret of Selling the Negro Market", which was designed to encourage advertisers to promote their products and services in the African American media.  In 2016, Johnson announced the sale of its publications and the creation of a new publisher by the new owner called "Ebony Media Corp." The specialty cosmetics business will be retained by Johnson. Calamander or coromandel is a valuable wood from Sri Lanka (Ceylon) and South East Asia.  It is of a hazel-brown color, with black stripes (or the other way about), very heavy and hard.  It is also known as Macassar ebony or variegated ebony and is closely related to genuine ebony, but is obtained from different species in the same genus; one of these is "Diospyros quaesita" Thwaites, from Sri Lanka.  The name "calamander" comes from the local Sinhalese name, "kalu-medhiriya", which means dark chamber; referring to the characteristic ebony black wood.  It is used in furniture, luthiery and for sculpture. Hatiora is a small genus of epiphytic cacti which belongs to the tribe Rhipsalideae within the subfamily Cactoideae of the Cactaceae.  Some "Hatiora" species are well known and widely cultivated ornamentals, known as Easter cactus or Whitsun cactus. Diospyros crassiflora, commonly known as Gabon ebony, African ebony, West African ebony, and Benin ebony, is a species of lowland-rainforest tree in the family Ebenaceae that is endemic to Western Africa.  It is named after the West African state of Gabon, though it also occurs in Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo and Nigeria. Trochetiopsis ebenus, the dwarf ebony or Saint Helena ebony, is a species of flowering plant that is endemic to the island of Saint Helena in the southern Atlantic Ocean.  It is not related to the ebony of commerce ("Diospyros" spp.) , but is instead a member of the mallow family, Malvaceae.  Saint Helena ebony is now critically endangered in the wild, being reduced to two wild individuals on a cliff, but old roots are sometimes found washed out of eroding slopes (relicts of its former abundance).  These are collected on the island a used for inlay work, an important craft on Saint Helena.  A related species, "Trochetiopsis melanoxylon" is now completely extinct. Ebony is a dense black hardwood, most commonly yielded by several different species in the genus "Diospyros", which also contains the persimmons. Ebony is dense enough to sink in water.  It is finely-textured and has a very smooth finish when polished, making it valuable as an ornamental wood.  The word "ebony" comes from the Ancient Egyptian "hbny", through the Ancient Greek ἔβενος ("ébenos"), into Latin and Middle English. Opera Ebony is an African-American opera company, which have performed Mozart in Harlem to African-American Heritage concerts in Iceland.  Gershwin in Moscow to Duke Ellington in the Caribbean.  Benjamin Matthews, Sister M. Elise Sisson, SBS (1897–1982), and Wayne Sanders founded Opera Ebony in 1973.  It has served as a professional platform for thousands of American artists, administrators and technical staff helping them to refine their talent and perfect their operatic craft.  In New York City, Opera Ebony has performed at Lincoln Center, Carnegie Hall, the Brooklyn Academy of Music, the Metropolitan Museum of Art, the World Trade Center, the Beacon Theatre, Langston Hughes Theater (Schomburg Center for Research and Black Culture) and the Manhattan Center.  Additionally, for ten years the company presented grand opera at Philadelphia's Academy of Music.  Since 1988, Opera Ebony's repertoire has found Brazil, Russia, Estonia, Sweden, Finland, Iceland, Canada, Switzerland and Martinique.  The company has also partnered with several major international orchestras, opera companies and music festivals including the Icelandic Symphony Orchestra, the Finnish National Opera, the Estonia Philharmonic and the Savolinna Music Festival. Diospyros malabarica, the gaub tree, Malabar ebony, black-and-white ebony or pale moon ebony, is a species of flowering tree in the family Ebenaceae that is native to the Indian Subcontinent and South East Asia. Hatiora gaertneri is a species of epiphytic cactus which belongs to the tribe Rhipsalideae within the subfamily Cactoideae of the Cactaceae.  Together with the hybrid with "H. rosea", Hatiora" ×"graeseri, it is known as Easter cactus or Whitsun cactus and is a widely cultivated ornamental plant. Diospyros fasciculosa, is a rainforest tree in the ebony family.  Australian common names include grey ebony, clustered persimmon, ebony and Long Tom.
Answer: genus "Diospyros"