Question: Are there more species in Dionysia or in Buxus?

Context paragraphs:
Cydalima perspectalis: Cydalima perspectalis or the box tree moth is a species of moth of the family Crambidae.  It is native to eastern Asia (Japan, China, Taiwan, Korea, the Russian Far East and India).  It is an introduced species in Europe, first recorded in Germany in 2006, and subsequently in Switzerland and the Netherlands in 2007, Great Britain in 2008, France and Austria in 2009, Hungary in 2011, Romania and Turkey.  It is also known from Slovakia, Belgium and Croatia.  During the preparation to the 2014 Olympics in 2012 it was introduced from Italy to Sochi with the planting stock of "Buxus sempervirens" and in the next year it began to defoliate "Buxus colchica" in large quantities.

Buxus vahlii: Buxus vahlii, or Vahl's boxwood, is a rare species of plant in the boxwood family.  It is native to Puerto Rico and St. Croix in the U.S. Virgin Islands, where it is known from no more than four populations total.  It has probably never been very common, but its distribution has been reduced by deforestation and other human disturbance of its habitat.  At the time it was listed as an endangered species of the United States in 1985, it was thought to be endemic to Puerto Rico.  Reports that it existed in Jamaica have not been confirmed.  A few individuals have been located in St. Croix, some of which are within Sandy Point National Wildlife Refuge.

Buxus obtusifolia: Buxus obtusifolia is a species of plant in the Buxaceae family.  It is found in Kenya and Tanzania.

Buxus microphylla: Buxus microphylla, the Japanese box or littleleaf box, is a species of "Buxus" native to Japan and Taiwan.

Buxus sempervirens: Buxus sempervirens, the common box, European box, or boxwood, is a species of flowering plant in the genus "Buxus", native to western and southern Europe, northwest Africa, and southwest Asia, from southern England south to northern Morocco, and east through the northern Mediterranean region to Turkey. " Buxus colchica" of western Caucasus and "B. hyrcana" of northern Iran and eastern Caucasus are commonly treated as synonyms of "B. sempervirens".

Dionysia (plant): Dionysia is a genus containing 49 species of flowering plants in the family Primulaceae.  They are small, cushion-forming alpines native to mountains in central Asia.  They are usually evergreen perennials with felted leaves, covered with bright yellow or pink, five-petalled flowers in spring.  They are often difficult to cultivate if the correct conditions are not provided.

Buxus colchica: Buxus colchica (syn.  "B. hyrcana") is a species of "Buxus" native to Azerbaijan, Georgia, Russia, and Turkey.  It is threatened by habitat loss.

Buxus nyasica: Buxus nyasica is a species of plant in the Buxaceae family.  It is endemic to Malawi.  It is threatened by habitat loss.

Buxus macowanii: Buxus macowanii, aka Cape box, is an evergreen species of boxwood endemic to South Africa, where it occurs in two disjunct populations - in coastal forest and shady ravines from the Eastern Cape to southern Natal, and in the Waterberg of the central Transvaal.  The genus "Buxus", comprising more than 100 species, is found worldwide, but is absent from Australia.

Buxus: Buxus is a genus of about 70 species in the family Buxaceae.  Common names include box (majority of English-speaking countries) or boxwood (North America).

Supporting paragraphs: Dionysia (plant) Buxus
Answer: Buxus is a genus of about 70 species