Question: Which genus, Rubus or Cunonia, contains the largest number of individual species?

full_context: Document 1: Rhus chirindensis: Rhus chirindensis is a medium-sized, semi-deciduous, trifoliate Southern African dioecious tree of up to 10 m tall, rarely 20 m, often multi-stemmed, occurring along the coastal belt from the Cape, through KwaZulu/Natal, Swaziland, Zimbabwe and Mozambique as far north as Tanzania, and growing in a wide variety of habitats such as open woodlands, in forests, along forest margins, in the open, among rocks and on mountain slopes. It was named by Swynnerton from a specimen collected by him near the Chirinda Forest in the Chipinge District of Southern Rhodesia. This is one of more than a hundred southern African species in the genus. It is commonly known as red currant because of a fancied resemblance of the fruit to that of the European redcurrant.
Document 2: Leucospermum: Leucospermum (Pincushion, Pincushion Protea or Leucospermum) is a genus of about 50 species of flowering plants in the family Proteaceae, native to Zimbabwe and South Africa, where they occupy a variety of habitats, including scrub, forest, and mountain slopes.
Document 3: Sorbus: Sorbus is a genus of about 100–200 species of trees and shrubs in the rose family Rosaceae. Species of "Sorbus" ("s.l.") are commonly known as whitebeam, rowan, service tree, and mountain-ash. The exact number of species is disputed depending on the circumscription of the genus, and also due to the number of apomictic microspecies, which some treat as distinct species, but others group in a smaller number of variable species. Recent treatments treat "Sorbus" in a narrower sense to include only the pinnate leaved species of subgenus "Sorbus", raising several of the other subgenera to generic rank.
Document 4: Rubus: Rubus is a large and diverse genus of flowering plants in the rose family, Rosaceae, subfamily Rosoideae, with 250–700 species.
Document 5: Rheum (plant): Rheum is a genus of about 60 perennial plants in the family Polygonaceae. The genus includes the vegetable rhubarb ("Rheum rhabarbarum" or "Rheum x hybridum".) The species have large somewhat triangular shaped leaves with long, fleshy petioles. The flowers are small, greenish-white to rose-red, and grouped in large compound leafy inflorescences. A number of varieties of rhubarb have been domesticated both as medicinal plants and for human consumption. While the leaves are toxic, the stalks are used in pies and other foods for their tart flavor.
Document 6: Pancheria: Pancheria is a genus of shrubs and trees in the family Cunoniaceae. It is to endemic to New Caledonia and contains 27 species. Leaves or whorled (or opposite in Pancheria confusa), simple or pinnate. The flowers are arranged in capitula, fruits are follicular. The species are dioecious. The genus is well diversified on ultramafic rocks and some species are nickel hyperaccumulators. It is related to "Cunonia" and "Weinmannia". It was named after Jean Armand Isidore Pancher.
Document 7: Nymania: Nymania capensis is known in English as "Chinese Lantern" because of the shape of its bright, colourful fruit, and in Afrikaans as "klapper" (meaning "firecracker" because children sometimes pop the capsules for fun). It is a spare, scrubby, woody shrub or small tree, typically ) 0.5–3 m tall. It is endemic to South Africa and some closely bordering territories, especially inland regions in central, northern and eastern parts. It grows mainly in Karooid regions, among the scrub of gorges, but also in open veld and river banks in the Great and Little Karoo, Namaqualand and Kalahari. The leaves are alternate and fascicled. They are simple and more or less linear. The flowers are solitary, born on pedicels in axils. The corolla and calyx have four lobes each, with eight stamens inserted at the base of the disc, the filaments being connate at their base. The ovary is superior and sessile; it has four lobes and four locules, each containing two collateral ascending ovules. The stigma is simple and the style extends further than the stamens. The fruit is an inflated membranous capsule, 3–5 cm across, each locule forming a distinct lobe. The ripe seeds are hard and rounded, some 2–4 mm in diameter. A locule may contain less than two seeds, due to abortion.
Document 8: Ribes: Ribes is a genus of about 150 known species of flowering plants native throughout the temperate regions of the Northern Hemisphere. It is usually treated as the only genus in the family Grossulariaceae, but a few taxonomists place the gooseberry species in a separate genus of "Grossularia".
Document 9: Fragaria: Fragaria is a genus of flowering plants in the rose family, Rosaceae, commonly known as strawberries for their edible fruits. There are more than 20 described species and many hybrids and cultivars. The most common strawberries grown commercially are cultivars of the garden strawberry, a hybrid known as "Fragaria" × "ananassa". Strawberries have a taste that varies by cultivar, and ranges from quite sweet to rather tart. Strawberries are an important commercial fruit crop, widely grown in all temperate regions of the world.
Document 10: Conophytum: Conophytum is a genus of South African and Namibian succulent plants that belong to the Aizoaceae family. The name is derived from the Latin “conus” (cone) and Greek “phytum” (plant). The plants are also known as knopies (buttons), waterblasies (water blisters), sphaeroids, conos, cone plants, dumplings, or button plants.
Document 11: Cunonia: Cunonia is a genus of shrubs and trees in the family Cunoniaceae. The genus has a disjunct distribution, with 24 species endemic to New Caledonia in the Pacific, and one species (Cunonia capensis) in Southern Africa. Leaves are opposite, simple or pinnate with a margin entire to serrate. Interpetiolar stipules are often conspicuous and generally enclose buds to form a spoon-like shape (hence the common name "Butterspoon Tree" for "Cunonia capensis"). Flowers are bisexual, white, red (pink to purple), or green, arranged in racemes. The fruit is a capsule opening first around the base then vertically, seeds are winged.
Document 12: Rubieae: Rubieae is a tribe of flowering plants in the Rubiaceae family and contains 969 species in 14 genera. The genus "Galium" is responsible for more than two thirds of the species in the tribe. The second largest genus is "Asperula", which contains about 200 species. Unlike the rest of the Rubiaceae family, the tribe contains predominantly perennial and annual herbs with pseudowhorls of leaves and leaflike stipules and is centered in temperate and tropical-mountain regions.
Document 13: Rhododendron subg. Rhododendron: Rhododendron" subgenus "Rhododendron is a subgenus of the genus "Rhododendron". With around 400 species, it is the largest of the eight subgenera (more recently reduced to five) containing nearly half of all known species of "Rhododendron" and all of the lepidote (scales on the underside of the leaves) species.
Document 14: Ericaceae: The Ericaceae are a family of flowering plants, commonly known as the heath or heather family, found most commonly in acid and infertile growing conditions. The family is large, with c. 4250 known species spread across 124 genera, making it the 14th most species-rich family of flowering plants. The many well-known and economically important members of the Ericaceae include the cranberry, blueberry, huckleberry, rhododendron (including azaleas), and various common heaths and heathers ("Erica", "Cassiope", "Daboecia", and "Calluna" for example).
Document 15: Kunzea: Kunzea is a genus of plants in the family Myrtaceae and is endemic to Australasia. They are shrubs, sometimes small trees and usually have small, crowded, rather aromatic leaves. The flowers are similar to those of plants in the genus "Leptospermum" but differ in having stamens that are longer than the petals. Most kunzeas are endemic to Western Australia but are few occur in eastern Australia and a few are found in New Zealand. The taxonomy of the genus is not settled and is complicated by the existence of a number of hybrids.
ground_truth: Rubus