Question: Which contains more species, Stewartia or Veronica?

full_context: Document 1: Hydrangea: Hydrangea ( ; common names hydrangea or hortensia) is a genus of 70–75 species of flowering plants native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest species diversity is in eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters tall, but some are small trees, and others lianas reaching up to 30 m by climbing up trees. They can be either deciduous or evergreen, though the widely cultivated temperate species are all deciduous.
Document 2: Veronica longifolia: Veronica longifolia, known as garden speedwell or longleaf speedwell, is a flowering plant of the genus "Veronica" in the family Plantaginaceae.
Document 3: Antirrhineae: The Antirrhineae are one of the 12 tribes of the Plantaginaceae family. It contains the toadflax relatives, such as snapdragons. They are probably most closely related to the turtlehead tribe (Cheloneae) and/or a large and badly resolved core group of their family including plants as diverse as water-starworts ("Callitriche"), foxgloves ("Digitalis"), and speedwell ("Veronica"). The Antirrhineae include about 30 genera with roughly 320 species, of which 150 are in genus "Linaria". The type genus is "Antirrhinum" .
Document 4: Veronica derwentiana: Veronica derwentiana (Derwent speedwell ) is a flowering plant species of the family Plantaginaceae, endemic to south-eastern Australia. It is sometimes included in the genus "Parahebe" or "Derwentia". It is a woody herb which grows to 140 cm high. Leaves are 5 to 20 cm long, with a cuneate, truncate or cordate base and toothed margins. The flowers are white, pale lilac or pale blue and appear in 5 to 20 cm long racemes of 40 to 100 flowers in summer. The species occurs in a variety of habitats including eucalypt forest and alpine herbfields in Queensland, New South Wales, Victoria, Tasmania and South Australia. It is often seen on disturbed sites.
Document 5: Stachyurus: Stachyurus is the only genus in the flowering plant family Stachyuraceae, native to the Himalayas and eastern Asia. They are deciduous shrubs or small trees with pendent racemes of 4-petalled flowers which appear on the bare branches before the leaves. The plants have leaves with serrate margins. Stachyuraceae contains a single genus with eight species.
Document 6: Strobilanthes: Strobilanthes is a genus of about 350 species of flowering plants in the family Acanthaceae, mostly native to tropical Asia and Madagascar, but with a few species extending north into temperate regions of Asia. Many species are cultivated for their 2-lipped, hooded flowers in shades of blue, pink, white and purple. Most are frost-tender and require protection in frost-prone areas.
Document 7: Omphalodes verna: Omphalodes verna (common names creeping navelwort or blue-eyed-Mary) is an herbaceous perennial rhizomatous plant of the genus "Omphalodes" belonging to the family Boraginaceae.
Document 8: Gordonia (plant): Gordonia is a genus of flowering plants in the family Theaceae, related to "Franklinia", "Camellia" and "Stewartia". Of the roughly 40 species, all but two are native to southeast Asia in southern China, Taiwan and Indochina. The remaining species, "G. lasianthus" (Loblolly-bay), is native to southeast North America, from Virginia south to Florida and west to Louisiana; "G. fruticosa" is native to the tropical rainforests of Central and South America, from Costa Rica to Brazil.
Document 9: Veronica nivea: Veronica nivea, the milfoil speedwell or snow speedwell, is a flowering plant species of the family Plantaginaceae, endemic to south-eastern Australia. It is sometimes included in the genus "Parahebe" or "Derwentia".
Document 10: Stauntonia: Stauntonia is a genus of flowering plant in the Lardizabalaceae family. It is named after George Staunton, who brought it to Britain from China in the 19th Century.
Document 11: Stewartia: Stewartia (sometimes spelled Stuartia) is a genus of 8-20 species of flowering plants in the family Theaceae, related to "Camellia". Most of the species are native to eastern Asia in China, Japan, Korea, Laos, Myanmar, Thailand, and Vietnam, with two ("S. malacodendron, S. ovata") in southeast North America, from Virginia and Kentucky south to Florida and Louisiana.
Document 12: Vernonia: Vernonia is a genus of about 1000 species of forbs and shrubs in the family Asteraceae. Some species are known as ironweed. Some species are edible and of economic value. They are known for having intense purple flowers. The genus is named for the English botanist William Vernon. There are numerous distinct subgenera and subsections in this genus. This has led some botanists to divide this large genus into several distinct genera. For instance, the "Flora of North America" only recognizes about 20 species in "Vernonia" sensu stricto, 17 of which are in North America north of Mexico, with the others being found in South America.
Document 13: Veronica (plant): Veronica is the largest genus in the flowering plant family Plantaginaceae, with about 500 species; it was formerly classified in the family Scrophulariaceae. Common names include speedwell, bird's eye, and gypsyweed.
Document 14: Veronica wormskjoldii: Veronica wormskjoldii is a species of flowering plant in the plantain family known by the common name American alpine speedwell. It is native to much of northern and western North America, including the western United States and northern Canada, from where it grows in moist alpine habitat, such as mountain forest understory. It has a wide subarctic distribution from Alaska to Greenland. This is a rhizomatous perennial herb producing a decumbent to erect, mostly unbranched stem up to 25 to 40 centimeters tall and coated in long hairs. The oppositely arranged leaves are 2 to 4 centimeters long and lack petioles. The inflorescence is a hairy, glandular raceme of flowers at the tip of the stem. Each flower has hairy, lance-shaped sepals and a blue corolla up to a centimeter wide. The fruit is a capsule around half a centimeter long which contains tiny flattened seeds.
Document 15: 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.
ground_truth: Veronica