Question: Which plant was named after a Greek Physician Dioscorea or Briza?

full_context: Document 1: Dioscorea: Dioscorea is a genus of over 600 species of flowering plants in the family Dioscoreaceae, native throughout the tropical and warm temperate regions of the world. The vast majority of the species are tropical, with only a few species extending into temperate climates. It is named after the ancient Greek physician and botanist Dioscorides.
Document 2: Genista: Genista is a genus of flowering plants in the legume family Fabaceae, native to open habitats such as moorland and pasture in Europe and western Asia. They include species commonly called broom, though the term may also refer to other genera, including "Cytisus" and "Chamaecytisus". Brooms in other genera are sometimes considered synonymous with "Genista": "Echinospartum", "Retama", "Spartium", "Stauracanthus", and "Ulex".
Document 3: Dioscorea orangeana: Dioscorea orangeana, is a tuberous vining flowering plant in the genus "Dioscorea", endemic the Forêt d’Orangea near Antsiranana in Madagascar, from which it derives its name. The tuber is possibly edible, and unlike most other "Dioscorea" species, the tuber has many finger-like lobes as opposed to a single tuber. Because the plant is new to science and the possible harvesting by local populations, the conservation status of "Dioscorea orangeana" is of great concern.
Document 4: Yam (vegetable): Yam is the common name for some plant species in the genus "Dioscorea" (family Dioscoreaceae) that form edible tubers. Yams are perennial herbaceous vines cultivated for the consumption of their starchy tubers in many temperate and subtropical world regions. The tubers themselves are also called "yams", having numerous cultivars.
Document 5: Briza: Briza is a genus of annual and perennial plants in the grass family, native to northern temperate regions of Eurasia, North Africa, and certain islands in the Atlantic.
Document 6: Dioscorea trifida: Dioscorea trifida is a species of flowering plant in the family Dioscoreaceae. It is a species of yam (genus "Dioscorea"). It is native to the Caribbean and Central and South America. Its many common names include Indian yam, cush-cush, and yampee. It is called mapuey in Venezuela, inhame in Brazil, tabena and ñame in Colombia, sacha papa in Peru, and ñampi in Costa Rica.
Document 7: Sesleria: Sesleria is a Eurasian and North African genus of perennial plants in the grass family.
Document 8: Poa pratensis: Poa pratensis, commonly known as Kentucky bluegrass, smooth meadow-grass, or common meadow-grass, is a perennial species of grass native to practically all of Europe, northern Asia and the mountains of Algeria and Morocco. Although the species is spread over all of the cool, humid parts of the U.S., it is not native to North America. Early European colonists brought seed of Kentucky bluegrass to the New World in mixtures with other grasses. "Poa pratensis" forms a valuable pasture plant, characteristic of well-drained, fertile soil. It is also used for making lawns in parks and gardens and is common in cool moist climates like the northeastern United States. When found on native grasslands in North America, however, it is considered an unwelcome exotic plant, and is indicative of a disturbed and degraded landscape.
Document 9: Colocasia: Colocasia is a genus of flowering plants in the family Araceae, native to southeastern Asia and the Indian subcontinent. Some species are widely cultivated and naturalized in other tropical and subtropical regions. Common names include tarul, karkala ko ganu, elephant-ear, taro, cocoyam, dasheen, chembu, champadhumpa, shavige gadde, and eddoe. Elephant-ear and cocoyam are also used for some other large-leaved genera in the Araceae, notably "Xanthosoma" and "Caladium". The generic name is derived from the ancient Greek word "kolokasion", which in the Greek botanist Dioscorides (1st century AD) meant the edible roots of both "Colocasia esculenta" and "Nelumbo nucifera". It is thought that the edible roots of "Colocasia esculenta" have been cultivated in Asia for more than ten thousand years. The species "Colocasia esculenta" is an invasive species in wetlands along the American Gulf coast, where it threatens to displace native wetland plants.
Document 10: Schizachyrium scoparium: Schizachyrium scoparium, commonly known as little bluestem or beard grass, is a North American prairie grass native to most of the United States, except California, Nevada, and Oregon, and a small area north of the Canada–US border. Its greatest manifestation has always been in the Midwestern prairies. Little bluestem is a perennial bunchgrass and is prominent in tallgrass prairie, along with big bluestem ("Andropogon gerardi"), indiangrass ("Sorghastrum nutans") and switchgrass ("Panicum virgatum"). It is a warm-season species, meaning it employs the C photosynthetic pathway.
Document 11: Dioscorea elephantipes: Dioscorea elephantipes (elephant's foot or Hottentot bread; syn. "Testudinaria elephantipes"), is a species of flowering plant in the genus "Dioscorea" of the family Dioscoreaceae, native to the dry interior of South Africa,
Document 12: Brachypodium: Brachypodium is a genus of plants in the grass family, widespread across much of Africa, Eurasia, and Latin America. It is classified in its own tribe Brachypodieae.
Document 13: Poa: Poa is a genus of about 500 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass (mainly in Europe and Asia), bluegrass (mainly in North America), tussock (some New Zealand species), and speargrass. "Poa" (πόα) is Greek for "fodder". "Poa" are members of the Pooideae subfamily of the Poaceae family.
Document 14: Poa bulbosa: Poa bulbosa is a species of grass known by the common names bulbous bluegrass or bulbous meadow-grass. It is native to Eurasia and North Africa, but it is present practically worldwide as an introduced species. It is widespread in the United States and southern Canada. It was introduced to the eastern United States around 1906 and the western US in 1915 as a contaminant in shipments of alfalfa seed. It was intentionally planted on both the east and west coasts to control weeds and prevent erosion. Today it is a common grass across the continent and is a noxious weed in some areas. It is a sturdy, hardy, persistent, aggressive grass that easily outcompetes many other plants and becomes the dominant species in disturbed habitat types, such as overgrazed fields.
Document 15: Dioscorea communis: Dioscorea communis (sometimes placed in the segregate genus "Tamus") is a species of flowering plant in the yam family Dioscoreaceae and is commonly known as black bryony, lady's-seal, and black bindweed.
ground_truth: Dioscorea