Question: Which genus has more species, Nandina or Photinia 

full_context: Document 1: Phyllanthus: Phyllanthus is the largest genus in the flowering plant family Phyllanthaceae. Estimates of the number species in this genus vary widely, from 750 to 1200. "Phyllanthus" has a remarkable diversity of growth forms including annual and perennial herbs, shrubs, climbers, floating aquatics, and pachycaulous succulents. Some have flattened leaflike stems called cladodes. It has a wide variety of floral morphologies and chromosome numbers and has one of the widest range of pollen types of any seed plant genus.
Document 2: Dracaena braunii: Dracaena braunii is a species of the genus "Dracaena". It is also known as "Dracaena sanderiana", after the German–English gardener Henry Frederick Conrad Sander (1847–1920). Common names include Sander's dracaena, ribbon dracaena, lucky bamboo, curly bamboo, Chinese water bamboo, friendship bamboo, Goddess of Mercy plant, Belgian evergreen, and ribbon plant. Although the word "bamboo" occurs in several of this plant's common names, "D. braunii" is of an entirely different taxonomic order from true bamboos. Despite several of its common names that suggest it is from China or Belgium, it is a native African species.
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: List of Psychotria species: The genus "Psychotria" is one of the largest genera of flowering plants and contains around 1850 species from the Rubiaceae family. Detailed, up to date information can be found on "Psychotria" in the World Checklist of Rubiaceae.
Document 5: Fragaria × Comarum hybrids: There are several commercially important hybrids between "Fragaria" and "Comarum" species in existence, but they have not yet received formal botanical names as hybrids between those genera. Both "Fragaria" and "Comarum" have at different times been considered to be part of the genus "Potentilla", and these hybrids have been named Potentilla" x "rosea, or are sometimes referred to as "Fragaria" × "Potentilla" hybrids.
Document 6: Dendrocnide photinophylla: Dendrocnide photinophylla, the shining-leaved stinging tree, is a rainforest tree of eastern Australia. It occurs from near the Colo River northwest of Sydney to Cooktown in tropical Queensland. A versatile species, it occurs in many different rainforest types. The specific epithet "photinophylla" translates to shining leaf. The generic name translates to stinging tree.
Document 7: Semiarundinaria fastuosa: Semiarundinaria fastuosa, common names Narihira bamboo, Narihira cane, and Narihiradake, is a species of flowering plant in the grass family Poaceae, native to Japan. Growing to 7 m tall by 2 m broad, it is a vigorous, evergreen bamboo with dark green cylindrical canes and dense tufts of lanceolate, glossy green leaves, up to 20 cm long.
Document 8: Fargesia: Fargesia is a genus of Asian bamboo in the grass family. They are native primarily to China, with a few species in Vietnam and in the eastern Himalayas. Some species are cultivated as ornamentals, with common names include umbrella bamboo and fountain bamboo.
Document 9: Paulownia: Paulownia is a genus of six to 17 species (depending on taxonomic authority) of flowering plants in the family Paulowniaceae, related to and sometimes included in the Scrophulariaceae. They are present in much of China, south to northern Laos and Vietnam and are long cultivated elsewhere in eastern Asia, notably in Japan and Korea. They are deciduous trees 12 – tall, with large, heart-shaped leaves 15–40 cm across, arranged in opposite pairs on the stem. The flowers are produced in early spring on panicles 10–30 cm long, with a tubular purple corolla resembling a foxglove flower. The fruit is a dry capsule, containing thousands of minute seeds.
Document 10: Chimonobambusa: Chimonobambusa is a genus of East Asian bamboo in the grass family. They are native to China, Japan, Vietnam, Myanmar, and the Himalayas.
Document 11: Nelumbonaceae: Nelumbonaceae, sometimes called the sacred lotus family, is a family of flowering plants, including the single genus "Nelumbo" with two species, "N. lutea" (North America) and "N. nucifera" (widespread in tropical Asia).
Document 12: Photinia: Photinia ( ) is a genus of about 40–60 species of small trees and large shrubs, but the taxonomy has recently varied greatly, with the genera "Heteromeles", "Stranvaesia" and "Aronia" sometimes included in "Photinia".
Document 13: Corymbia: Corymbia is a genus of about 113 species of tree that were classified as "Eucalyptus" species until the mid-1990s. It includes the bloodwoods, ghost gums and spotted gums. The bloodwoods had been recognised as a distinct group within the large and diverse "Eucalyptus" genus since 1867. Molecular research in the 1990s, however, showed that they, along with the rest of the Corymbia section, are more closely related to "Angophora" than to "Eucalyptus", and are probably best regarded as a separate genus. All three genera—"Angophora", "Corymbia" and "Eucalyptus"—are closely related, often difficult to tell apart, and are still commonly and correctly referred to as "eucalypts". Groups of naturalists and conservationists do not recognise the "Corymbia" genus and still categorise its species within "Eucalyptus".
Document 14: Deinanthe: Deinanthe is a genus consisting of a few species of rare herbaceous-habit rhizomatous plants found in the mountain woodlands of East Asia, ranging from China to Japan. They are handsome clump-forming perennials good for shade, woodland and rock gardens. These attractive deciduous plants have relatively large "fishtail" leaves (cleft at the apex). Deinanthes grow at a slow rate to be bushy and shrub-like, 2ft tall and wide. The leaves attain 3 to 4 inches in length,being deep green, roughly textured, deep veined, cordate at their bases and with serrate margins. The shoots emerge from stout, knobby rhizomes. Leaves are easily damaged in direct sun exposure. Flowering occurs in late summer to early fall. The delicate, waxy, nodding cup-shaped flowers in rich to pale purple-blue, rose or white, are borne in loose terminal clusters. Resembling gargantuan fertile hydrangea flowers, with numerous yellowish to pale blue anthers, they are occasionally accompanied by sterile flowers, as in the lacecap hydrangeas. Roots and leaves are edible.
Document 15: Nandina: Nandina domestica ( ) commonly known as nandina, heavenly bamboo or sacred bamboo, is a species of flowering plant in the family Berberidaceae, native to eastern Asia from the Himalayas to Japan. It is the only member of the monotypic genus Nandina.
ground_truth: Photinia