Question: Which as more species Larrea and Forsythia?

Context articles: Forsythia koreana
Larrea
Oleaceae
Creosote gall midge
Abeliophyllum
Forsythia
Forsythia suspensa
Tannerella forsythia

Forsythia koreana, commonly called gaenari or Korean goldenbell tree, is a species in the olive family, Oleaceae.
Larrea is a genus of flowering plants in the caltrop family, Zygophyllaceae.
 It contains five species of evergreen shrubs that are native to the Americas.
 The generic name honours Bishop J.A. Hernández Pérez de Larrea, a patron of science.
 South American members of this genus are known as jarillas and can produce fertile interspecific hybrids.
 One of the more notable species is the creosote bush ("L. tridentata") of the southwestern United States and northwestern Mexico.
 The King Clone ring in the Mojave Desert is a creosote bush clonal colony estimated to be 11,700 years old.
The Oleaceae are a family of flowering plants in the order Lamiales.
 It presently comprises 26 genera, one of which is recently extinct.
 The 25 extant genera include "Cartrema", which was resurrected in 2012.
 The number of species in the Oleaceae is variously estimated in a wide range around 700.
 The Oleaceae consist of shrubs, trees, and a few lianas.
 The flowers are often numerous and highly odoriferous.
 The family has a subcosmopolitan distribution, ranging from the subarctic to the southernmost parts of Africa, Australia, and South America.
 Notable members of the Oleaceae include olive, ash, jasmine, and several popular ornamental plants including privet, forsythia, fringetrees, and lilac.
The "Asphondylia auripila" group (Diptera: Cecidomyiidae) consists of 15 closely related species of gall-inducing flies which inhabit creosote bush (Zygophyllaceae: "Larrea tridentata").
 They have partitioned the plant ecologically with different gall midge species inhabiting the leaves, stems, buds, and flowers of creosote bush.
 Each species induces a uniquely shaped gall but the insects are otherwise morphologically very similar and very difficult to tell apart.
 Their life cycle begins when the female oviposits into the part of the plant which her species prefers, she inserts her egg along with a fungal spore from a mycangia (a small pocket to store fungal spores).
 A gall forms and the fungal mycelium grows to line the inside of the gall, when the egg hatches the developing larva feeds upon the fungus.
 Adult emergence is timed with periods of plant growth associated with winter, spring, or summer rain fall.
 In contrast to many other groups of plant-feeding insects (which form new species through changes to new host plants) the evolution of new species in the "A. auripila" group seems to be a result of colonizing new parts of the same plant and/or colonization of new seasons of plant growth.
Abeliophyllum, also miseonnamu, Korean abeliophyllum, white forsythia, or Korean abelialeaf) is a monotypic genus of flowering plants in the olive family, Oleaceae.
 It consists of one species, Abeliophyllum distichum Nakai, endemic to Korea, where it is endangered in the wild, occurring at only seven sites.
 It is related to "Forsythia", but differs in having white, not yellow, flowers.
Forsythia ( or ) is a genus of flowering plants in the family Oleaceae (olive family).
 There are about 11 species, mostly native to eastern Asia, but one native to southeastern Europe.
 The common name is also forsythia; the genus is named after William Forsyth.
Forsythia suspensa (, weeping forsythia or golden-bell) is a species of flowering plant in the family native to Asia.
 It is one of the 50 fundamental herbs used in traditional Chinese medicine.
 It contains the lignan Pinoresinol.
Tannerella forsythia is an anaerobic, Gram-negative bacterial species of the Cytophaga-Bacteroidetes family.
 It has been implicated in periodontal diseases and is a member of the red complex of periodontal pathogens. "T. forsythia" was previously named "Bacteroides forsythus" and "Tannerella forsythensis".