Question: Which genus has more species in it, Dipteronia or Syringa?

full_context: Document 1: Diospyros: Diospyros is a genus of over 700 species of deciduous and evergreen trees and shrubs. The majority are native to the tropics, with only a few species extending into temperate regions. Depending on their nature, individual species are commonly known as ebony or persimmon trees. Some are valued for their hard, heavy, dark timber, and some for their fruit. Some are useful as ornamentals and many are of local ecological importance.
Document 2: Syringa: Syringa (lilac) is a genus of 12 currently recognized species of flowering woody plants in the olive family (Oleaceae), native to woodland and scrub from southeastern Europe to eastern Asia, and widely and commonly cultivated in temperate areas elsewhere.
Document 3: Sapindaceae: The Sapindaceae are a family of flowering plants in the order Sapindales known as the soapberry family. It contains 138 genera and 1858 accepted species, including maple, ackee, horse chestnut and lychee.
Document 4: Syringa pubescens: Syringa pubescens is a species of flowering plant in the lilac genus of the family Oleaceae, native to Korea and China (Gansu, Hebei, Henan, Hubei, Jilin, Liaoning, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan).
Document 5: Oleaceae: 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.
Document 6: Syringa oblata subsp. dilatata: Syringa oblata subsp. dilatata, also known as Korean early lilac, is a subspecies of the species "Syringa oblata" in the genus "Syringa", in the family Oleaceae.
Document 7: Syringa emodi: Syringa emodi is a species in the genus "Syringa", in the family Oleaceae. It is also known as Himalayan lilac.
Document 8: Sapindus saponaria: Sapindus saponaria is a small to medium-sized deciduous tree native to the Americas. Common names include wingleaf soapberry, western soapberry, jaboncillo, sulluku and mānele (Hawaiian). Its genus name, ""Sapindus"", comes from the Latin, meaning Indian soap, and its specific epithet means "soapy."
Document 9: Aceraceae: Aceraceae were recognized as a family of flowering plants also called the maple family. They contain two to four genera, depending upon the circumscription, of some 120 species of trees and shrubs. A common characteristic is that the leaves are opposite, and the fruit a schizocarp.
Document 10: Syringa oblata: Syringa oblata is a species in the genus "Syringa", in the family Oleaceae. It is also known as early blooming lilac or broadleaf lilac.
Document 11: Lavandula: Lavandula (common name lavender) is a genus of 47 known species of flowering plants in the mint family, Lamiaceae. It is native to the Old World and is found from Cape Verde and the Canary Islands, Europe across to northern and eastern Africa, the Mediterranean, southwest Asia to southeast India. Many members of the genus are cultivated extensively in temperate climates as ornamental plants for garden and landscape use, for use as culinary herbs, and also commercially for the extraction of essential oils. The most widely cultivated species, "Lavandula angustifolia", is often referred to as lavender, and there is a color named for the shade of the flowers of this species.
Document 12: Diapensiaceae: Diapensiaceae is a small family of flowering plants, comprising 12 species in five genera. Three of the genera, "Berneuxia", "Galax", and "Pyxidanthera", contain only a single species. The Asian species of "Shortia" were formerly separated as the genus "Schizocodon", and some authors still recognize "S. soldanelloides" under that name. Another genus, "Diplarche", was included in the family by some authors but is now regarded as a member of Ericaceae.
Document 13: Maple: Acer is a genus of trees or shrubs commonly known as maple. The genus is placed in the Sapindaceae family. There are approximately 128 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America. Only one species, "Acer laurinum", extends to the Southern Hemisphere. The type species of the genus is the sycamore maple, "Acer pseudoplatanus", the most common maple species in Europe.
Document 14: Dipteronia: Dipteronia is a genus of two living and one extinct species, regarded in the soapberry family Sapindaceae "sensu lato" after Angiosperm Phylogeny Group (APG I 1998, APG II 2003) and more recently (Harrington "et al." 2005) )or traditionally by several authors in Aceraceae, related to the maples.
Document 15: Dipteronia sinensis: Dipteronia sinensis is a plant species in the genus "Dipteronia", endemic to mainland China, and regarded in the soapberry family Sapindaceae "sensu lato" after Angiosperm Phylogeny Group (APG I 1998, APG II 2003) and more recently (Harrington "et al." 2005) ), or traditionally by several authors in Aceraceae, related to the maples.
ground_truth: Syringa