Question: Does the genus Colquhounia or Prostanthera contain more species?

Context articles: Bolitoglossa
Euphronia
Colquhounia
Prostanthera ovalifolia
Prostanthera prostantheroides
Prostanthera rotundifolia
Xylothamia
Prostanthera
Colquhounia elegans
Gastornis

Bolitoglossa is a genus of lungless salamanders, also called mushroom-tongued salamanders tropical climbing salamanders or web-footed salamanders, in the family Plethodontidae.
 Their range is between northern Mexico through Central America to Colombia, Venezuela, Ecuador, Peru, northeastern Brazil, and central Bolivia.
 Neotropical salamanders of the "Bolitoglossa" genus make up the largest genus in the order Caudata, consisting of approximately one-fifth of all known species of salamanders.
 Adult salamanders range anywhere from 45mm to 200mm in length depending on their specific species.
 They are notorious for their ability to project their tongue at prey items, as indicated from their name.
 They are also known for their webbed feet, having significantly more webbing than any other species outside their genus with the exception of the cave-dwelling Mexican bolitoglossine "Chiropterotriton magnipes".
 Although webbed feet are a common characteristic of these salamanders, only about half of the species in this genus contain webbed feet.
Euphronia is a genus of three species of shrubs native to northern South America and is the only genus in the family Euphroniaceae.
 It was previously classified in the Vochysiaceae family and elsewhere, but the APG III system of 2009 recognizes Euphroniaceae and places "Euphronia" in it.
 The genus was originally described by Carl Friedrich Philipp von Martius and Joseph Gerhard Zuccarini in 1824 when they described "Euphronia hirtelloides" as a new species.
 In 1918, the German botanist Johannes Gottfried Hallier reclassified what was then known as "Lightia guianensis" as a species in this genus: "Euphronia guianensis".
 And in 1987, the American botanist Julian Alfred Steyermark described the third species, "Euphronia acuminatissima".
 It was proposed in 1989 that the family Euphroniaceae be erected to contain the genus because it was sufficiently different from other related genera.
 An analysis of the molecular phylogenetics of these related genera and families in 1998 supported the decision to retain the genus within a monotypic family.
Colquhounia is a genus of about six species of evergreen or semi-evergreen shrubs or subshrubs in the family Lamiaceae, first described in 1822.
 They are native to the Himalaya and southwestern China south to Peninsular Malaysia.
Prostanthera ovalifolia, known as the oval-leaf mintbush or purple mintbush, is one of about 90 Australian endemic species from the genus "Prostanthera".
 Known as Australian mints or native mints.
Prostanthera prostantheroides is a plant in the family Lamiaceae, found only in West Australia.
 It was formerly treated as one of two species in the genus "Wrixonia", now included in "Prostanthera" by the World Checklist of Selected Plant Families.
Prostanthera rotundifolia (roundleaf mint bush) is a species of flowering plant in the family Lamiaceae, one of about 90 Australian endemic species from the genus "Prostanthera".
 Its native distribution is in South Australia, New South Wales, Victoria and Tasmania.
 The species is listed as vulnerable in Tasmania.
Xylothamia, the desert goldenrods, is a genus of flowering plants in the daisy family, Asteraceae.
 Until 2003, it was held to contain nine species of shrubs native to deserts of Mexico and the southwestern United States.
 However, it seems to contain at least two groups.
 Four species are related to "Gundlachia" and may be moved to that genus.
 The relationships of the other five species is not quite as clear.
 All nine species do belong in the subtribe Solidagininae.
Prostanthera, commonly known as mintbush or mint bush, is a genus of flowering plants of the family Lamiaceae.
 There are about 90 species within the genus, all of which are endemic to Australia.
 The word is derived from the Greek for an appendage.
 Within the flowers are small spur-like appendages on the anthers.
Colquhounia elegans (秀丽火把花, xiu li huo ba hua) is a shrub species in the genus "Colquhounia" found in Asia (Yunnan, Cambodia, Laos, Myanmar, Thailand, Vietnam).
Gastornis is an extinct genus of large flightless birds that lived during the late Paleocene and Eocene epochs of the Cenozoic era.
 The genus is currently thought to contain three or four distinct species, known from incomplete fossil remains, found in western-central Europe (England, Belgium, France and Germany).
 More complete specimens are known from a fourth, North American species, which had previously been classified in the distinct genus Diatryma.
 Many scientists now consider "Diatryma" to be so similar to the other species of "Gastornis" that it should also be included in that genus.
 A fifth species, also previously classified in its own genus, is known from China.