Question: Do Sinningia or Elodea have more species?

full_context: Document 1: Echinodorus grisebachii: Echinodorus grisebachii or Echinodorus amazonicus is commonly known as Amazon sword plant, although other plants are also known under this common name. The aquatic plant is cultivated for and used in ponds and artificial aquatic habitats. It is native to Cuba, Central America, and South America as far south as Brazil and Bolivia.
Document 2: Sinningia speciosa: Sinningia speciosa, commonly known in the horticultural trade as Gloxinia, is a tuberous member of the flowering plant family Gesneriaceae. The common name has persisted since its original introduction to cultivation from Brazil in 1817 as "Gloxinia speciosa". The name florist's gloxinia is sometimes used to distinguish it from the rhizomatous species now included in the genus "Gloxinia". Another common name is Brazilian gloxinia. The plants produce large, velvety, brightly colored flowers and are popular houseplants. Cultural requirements are similar to those of African violets except that "S. speciosa" generally requires more light and often has a dormant period, when the tuber should be kept cool and dry until it resprouts.
Document 3: Elodea: Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in 1803. "Elodea" is native to North and South America and is also widely used as aquarium vegetation. It lives in fresh water.
Document 4: Egeria (plant): Egeria is a genus of three species of aquatic plants in the family Hydrocharitaceae described as a genus in 1849. native to warm-temperate South America.
Document 5: Sinningia: Sinningia is a genus of flowering plants in the family Gesneriaceae. It is named after Wilhelm Sinning (1792-1874), a gardener of the Botanische Gärten der Friedrich-Wilhelms-Universität Bonn. There are about 65 species of tuberous herbaceous perennials, all occurring in Central and South America, with the greatest concentration of species occurring in southern Brazil.
Document 6: Sinningia canastrensis: Sinningia canastrensis is a tuberous member of the flowering plant family Gesneriaceae. It is found in Brazil.
Document 7: Sinningia muscicola: Sinningia muscicola, also known as Sinningia sp. "Rio das Pedras", is a tuberous member of the flowering plant family Gesneriaceae. The plants produce small, bright lavender flowers. Cultural requirements are similar to African Violets except that "S. speciosa" generally requires more humid environment.
Document 8: Pontederia: Pontederia is a genus of tristylous aquatic plants, members of which are commonly known as pickerel weeds. "Pontederia" is endemic to the Americas, distributed from Canada to Argentina, where it is found in shallow water or on mud. The genus was named by Linnaeus in honour of the Italian botanist Giulio Pontedera.
Document 9: Egeria densa: Egeria densa, the large-flowered waterweed or Brazilian waterweed, is a species of "Egeria" native to warm temperate South America in southeastern Brazil, Argentina, and Uruguay. It is considered a problematic invasive species due to its use in home aquariums and subsequent release into non-native habitats.
Document 10: Sinningia globulosa: Sinningia globulosa is a tuberous member of the flowering plant family Gesneriaceae. It is found in Brazil.
Document 11: Sinningia helioana: Sinningia helioana is a tuberous member of the flowering plant family Gesneriaceae. It is found in Brazil.
Document 12: Sinningia gerdtiana: Sinningia gerdtiana is a tuberous member of the flowering plant family Gesneriaceae. It is found in Brazil.
Document 13: Elodea nuttallii: Elodea nuttallii is a species of waterweed known by the common name western waterweed or Nuttall's waterweed. This is a perennial aquatic plant which is native to North America where it grows submersed in lakes, rivers, and other shallow water bodies. It is also found in Eurasia, where it is commonly weedy; it is not known as a weed species in its native range. It is sometimes used as an aquarium plant.
Document 14: Elatostema: Elatostema is a genus of flowering plants containing approximately 350 known species in the nettle family Urticaceae, native to tropical forest clearings throughout Australasia, Asia and Africa. There may be as many as 1,000 species of this little-known genus, which is susceptible to deforestation and other forms of human exploitation. Some species, for instance the recently discovered "E. fengshanense", show unusual adaptations to growing in deep shade in caves. DNA analysis suggests that the three genera "Elastostema", "Pellionia", and "Pilea" be grouped together as one.
Document 15: Salvia gesneriflora: Salvia gesneriflora (sometimes spelled Salvia gesneriiflora) is a herbaceous perennial or subshrub native to mountainous provinces of the Sierra Madre Oriental in Mexico, growing at 7,500-10,000 ft elevation. It was named in honor of 15th century Swiss botanist Conrad Gessner, for whom the genus "Gesneria" and family Gesneriaceae are also named. The long tubular flowers of this salvia resemble "Gesneria" flowers. It is a popular ornamental plant.
ground_truth: Sinningia