Question: Which genus contains more species: Fallopia, or Nicandra?

full_context: Document 1: Nicotiana: Nicotiana ( ) is a genus of herbaceous plants and shrubs of the family Solanaceae, that is indigenous to the Americas, Australia, south west Africa and the South Pacific. Various "Nicotiana" species, commonly referred to as tobacco plants, are cultivated as ornamental garden plants. "N. tabacum" is grown worldwide for production of tobacco leaf for cigarettes and other tobacco products.
Document 2: Passiflora mixta: Passiflora mixta, from the family Passifloraceae is also known as "curuba", "curuba de indio", "curuba de monte", "curubita", "palta" (Colombia), "parcha" (Venezuela), and "tacso" (Ecuador). Originally, it derived from the monophyletic Adeans "Passiflora" subgenus "Tacsonia". "Passiflora" includes 47 species, one of which is "Passiflora mixta" which can be found in Southern America. A perennial vine, the "Passiflora mixta" is pink to orange-red in color.
Document 3: Datura: Datura is a genus of nine species of poisonous vespertine flowering plants belonging to the family Solanaceae. They are commonly known as daturas, but also known as devil's trumpets, not to be confused with angel's trumpets, its closely related genus "Brugmansia". They are also sometimes called moonflowers, jimsonweed, devil's weed, hell's bells, thorn-apple, and many more. Its precise and natural distribution is uncertain, owing to its extensive cultivation and naturalization throughout the temperate and tropical regions of the globe. Its distribution within the Americas and North Africa, however, is most likely restricted to the United States and Mexico and Southern Canada in North America, and Tunisia in Africa, where the highest species diversity occurs.
Document 4: Eupatorieae: Eupatorieae is a tribe of over 2000 species of plants in the aster family. Most of the species are native to tropical, subtropical, and warm temperate areas of the Americas, but some are found elsewhere. Well-known members are "Stevia rebaudiana" (used as a sugar substitute), a number of medicinal plants ("Eupatorium"), and a variety of late summer to autumn blooming garden flowers, including "Ageratum" (flossflower) and "Conoclinium" (mistflower).
Document 5: Nicandra: Nicandra is a monotypic genus of flowering plants in the nightshade family containing the single species Nicandra physalodes. It is known by the common names apple-of-Peru and shoo-fly plant. It is thought originally to have been native to Peru (known elsewhere as an introduced species and sometimes as a weed) and is found nowadays as a ruderal species in tropical, subtropical and, to a lesser extent, temperate areas all over the world. It has also long been cultivated as an ornamental plant for its attractive flowers and curious fruits (the latter sometimes dried for use in floral design) and has been adopted into the traditional medicine of countries far-removed from its original home.
Document 6: 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 7: Gynura aurantiaca: Gynura aurantiaca, called purple passion or velvet plant is a species of plants in the chrysanthemum family It is native to Southeast Asia but grown in many other places as a house plant. In warm regions, it is frequently grown in outdoor on patios and in gardens rather than inside buildings, and hence it has escaped into the wild in Africa, Australia, South America, Mesoamerica, Florida, and a few other places.
Document 8: Polygonum spergulariiforme: Polygonum spergulariiforme is a North American species of flowering plants in the buckwheat family known by the common name spurry knotweed or fall knotweed. It grows in western Canada (British Columbia and Saskatchewan) and the western United States (primarily Washington, Oregon, and northern and central California but with a few isolated populations in Idaho, Wyoming and Montana).
Document 9: Polygala nana: Polygala nana, commonly known as candyroot or low bachelors' buttons, is a very small herbaceous plant which is native to the southeastern United States. The root has a sweet liquorice flavor when it is chewed, but it is usually hidden underground until the plant flowers. The seeds of candyroot are dispersed by ants.
Document 10: Filipendula: Filipendula is a genus of 12 species of perennial herbaceous flowering plants in the family Rosaceae, native to the temperate regions of the Northern Hemisphere. Well-known species include meadowsweet ("Filipendula ulmaria") and dropwort ("Filipendula vulgaris"), both native to Europe, and queen-of-the-forest ("Filipendula occidentalis") and queen-of-the-prairie ("Filipendula rubra"), native to North America.
Document 11: Astragalus: Astragalus is a large genus of about 3,000 species of herbs and small shrubs, belonging to the legume family Fabaceae and the subfamily Faboideae. It is the largest genus of plants in terms of described species. The genus is native to temperate regions of the Northern Hemisphere. Common names include milkvetch (most species), locoweed (in North America, some species) and goat's-thorn ("A. gummifer", "A. tragacanthus"). Some pale-flowered vetches are similar in appearance, but vetches are more vine-like.
Document 12: Plumeria rubra: Plumeria rubra is a deciduous plant species belonging to the genus "Plumeria". Originally native to Mexico, Central America, Colombia and Venezuela, it has been widely cultivated in subtropical and tropical climates worldwide and is a popular garden and park plant, as well as being used in temples and cemeteries. It grows as a spreading tree to 7 – high and wide, and is flushed with fragrant flowers of shades of pink, white and yellow over the summer and autumn. Its common names include frangipani, red paucipan, red-jasmine, red frangipani, common frangipani, temple tree, or simply plumeria.
Document 13: Drosera peruensis: Drosera peruensis is a carnivorous plant of the genus Drosera, commonly known as sundew. This Drosera species was first identified in Peru in 2002 by Tânia Regina dos Santos Silva and Mireya D. Correa following work to update the genus Drosera for the reference text, "Flora Neotropica". (Drosera species generally can be found in most continents, but the vast majority grow in the Southern Hemisphere, especially in Southwestern Australia, Africa, and South America).
Document 14: Fallopia: Fallopia is a genus of about 12–15 species of flowering plants in the buckwheat family, often included in a wider treatment of the related genus "Polygonum" in the past. The genus is native to temperate and subtropical regions of the Northern Hemisphere. The genus includes herbaceous perennial plants, herbaceous vines, and woody vines.
Document 15: Bupleurum: Bupleurum is a large genus of annual or perennial herbs or woody shrubs, with about one hundred and ninety species, belonging to the Apiaceae family. The full size of its species may vary between a few cm to up to 3 m high. Their compound umbels of small flowers are adorned with bracteoles that are sometimes large and may play a role in attracting pollinators. Rare among Apiaceae are the simple leaves, bracts (if present) and bracteoles. The genus is almost exclusively native in the Old World Northern Hemisphere, with one species native to North America and one species native to southern Africa.
ground_truth: Fallopia