Question: How many species are in the plant family that includes the vine Cucumis argenteus?

Context articles: Cucumis argenteus
Cucumber
Muehlenbeckia complexa
Taxonomy of Liliaceae
Otiorhynchus
Secamone elliptica
Fabaceae
Cucurbitaceae
List of longest vines
Genistoids

Cucumis argenteus is a vine in the "Cucurbitaceae" family that is native to Western Australia through parts of the Pilbara and north eastern Goldfields-Esperance regions.
Cucumber ("Cucumis sativus") is a widely cultivated plant in the gourd family, Cucurbitaceae.
 It is a creeping vine that bears cucumiform fruits that are used as vegetables.
 There are three main varieties of cucumber: "slicing", "pickling", and "seedless".
 Within these varieties, several cultivars have been created.
 In North America, the term "wild cucumber" refers to plants in the genera "Echinocystis" and "Marah", but these are not closely related.
 The cucumber is originally from South Asia, but now grows on most continents.
 Many different types of cucumber are traded on the global market.
Muehlenbeckia complexa, commonly known as maidenhair vine, creeping wire vine, lacy wire vine, angel vine, mattress vine, mattress wire weed, necklace vine, and wire vine, is an ornamental plant in the Polygonaceae family, which is native to New Zealand.
 It is quite vigorous and probably the best species for trimming and topiary.
 It is semi-deciduous, growing to 15 ft (4.5 m) or more up suitable supports, and produces swollen white berries with black seeds.
 This species can become quite weedy in suitable climates if not restrained.
The taxonomy of Liliaceae has had a complex history since the first description of this flowering plant family in the mid-eighteenth century.
 Originally, the Liliaceae or Lily family were defined as having a ""calix"" (perianth) of six equal-coloured parts, six stamens, a single style, and a superior, three-chambered (trilocular) ovary turning into a capsule fruit at maturity.
 The taxonomic circumscription of the Liliaceae family progressively expanded until it became the largest plant family and also extremely diverse, being somewhat arbitrarily defined as all species of plants with six tepals and a superior ovary.
 It eventually came to encompass about 300 genera and 4,500 species, and was thus a "catch-all" and hence paraphyletic taxon.
 Only since the more modern taxonomic systems developed by the Angiosperm Phylogeny Group (APG) and based on phylogenetic principles, has it been possible to identify the many separate taxonomic groupings within the original family and redistribute them, leaving a relatively small core as the modern Liliaceae family, with fifteen genera and 600 species.
Otiorhynchus (often spelt "Otiorrhynchus") is a large genus of weevils in the family Curculionidae.
 Many species of the genus, particularly the black vine weevil ("O. sulcatus") and the strawberry root weevil ("O. ovatus"), are important pests, both as larvae and as adults.
 Larvae feed on plant roots.
 Adults are flightless with fused elytra and feed at night on plant foliage.
 In many species of the genus at least some races are polyploid and parthenogenetic, while the rest of the races and species are diploid and bisexual.
 "Otiorhynchus" weevils, particularly "O. scaber", have been a popular subject for studies of the evolution of parthenogenesis.
 The genus is native to the Palearctic region.
 However, sixteen species were inadvertently introduced to North America and have become widespread there.
Secamone elliptica, also known as corky milk vine, cork vine and secamone, is a species of vines or lianas, of the plant family Apocynaceae.
 The range extends from southern China through much of Southeast Asia to Northern Australia, from The Kimberley, across The Top End and the East coast from Cape York to northern New South Wales.
 The natural habitat is monsoon forest, littoral rainforest and occasionally in more open forest types.
The Fabaceae or Papilionoideae, commonly known as the legume, pea, or bean family, is a large and economically important family of flowering plants.
 It includes trees, shrubs, and perennial or annual herbaceous plants, which are easily recognized by their fruit (legume) and their compound, stipulated leaves.
 Many legumes have characteristics of flowers and fruits.
 The family is widely distributed, and is the third-largest land plant family in terms of number of species, behind only the Orchidaceae and Asteraceae, with about 751 genera and some 19,000 known species.
 The five largest of the genera are "Astragalus" (over 3,000 species), "Acacia" (over 1000 species), "Indigofera" (around 700 species), "Crotalaria" (around 700 species) and "Mimosa" (around 500 species), which constitute about a quarter of all legume species.
 The ca. 19,000 known legume species amount to about 7% of flowering plant species.
 Fabaceae is the most common family found in tropical rainforests and in dry forests in the Americas and Africa.
The Cucurbitaceae, also called cucurbits and the gourd family, are a plant family consisting of about 965 species in around 95 genera, the most important of which are:
This is a list of world's longest vines.
 A vine can refer to any plant with a growth habit of trailing or (that is, climbing) stems or runners.
 The first five species are unlikely to be superseded or even to change order of rank.
 This list is not all inclusive in part because many species have never been measured, and also because more careful measurements are needed for many species on this list.
 Some species have been included because they are the largest of a habit type (such as Poison Oak as longest root climber) or as the longest member of their division or phylum (such as Equisetum giganteum).
The Genistoids are one of the major radiations in the plant family Fabaceae.
 Members of this phylogenetic clade are primarily found in the Southern hemisphere.
 Some genera are pollinated by birds.
 The genistoid clade is consistently resolved as monophyletic in molecular phylogenetic analyses.
 It is estimated to have arisen 56.4 ± 0.2 million years ago (in the Paleocene).
 A node-based definition for the genistoids is: "the MRCA of "Poecilanthe parviflora" and "Lupinus argenteus"."
 One morphological synapomorphy has been tentatively identified: production of quinolizidine alkaloids.
 Some genera also accumulate pyrrolizidine.
 A new genus, to be segregated from "Clathrotropis", has also been proposed to occupy an undetermined position within the genistoid clade.