Question: Which of the following are native to more parts of the world, Andropogon or Machaeranthera?
Context: 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. Andropogon (common names: beard grass, bluestem grass, broomsedge) is a widespread genus of plants in the grass family, native to much of Asia, Africa, and the Americas as well as southern Europe and various oceanic islands. Centaurea cyanus, commonly known as cornflower or bachelor's button, is an annual flowering plant in the family Asteraceae, native to Europe.  In the past it often grew as a weed in cornfields (in the broad sense of the word "corn", referring to grains, such as wheat, barley, rye, or oats), hence its name.  It is now endangered in its native habitat by agricultural intensification, particularly over-use of herbicides, destroying its habitat.  It is also, however, through introduction as an ornamental plant in gardens and a seed contaminant in crop seeds, now naturalised in many other parts of the world, including North America and parts of Australia. Exploitation colonialism is the national economic policy of conquering a country to exploit its natural resources and its native population.  The practice of exploitation colonialism contrasts with settler colonialism, the policy of conquering a country to establish a branch of the metropole (Motherland), and for the exploitation of its natural resources and native population.  A colonialist power pursues settler colonialism to relieve the pressures of over-population upon the economy and the national territory of the motherland, and to extend its territory and culture by reproducing its society in other parts of the world.  A reason for which a country might practice exploitation colonialism is the immediate financial gain produced by the low-cost extraction of raw materials by means of a native people, usually administered by a colonial government. Brassica elongata, the elongated mustard or long-stalked rape, is a species of the mustard plant that is native to parts of Central Europe, Eastern Europe, the Balkan Peninsula, the Caucasus, Morocco and parts of Central Asia.  Through plant invasion this species has become naturalized in many other parts of the world.  Some of these naturalized regions include South Africa, North Western Europe, Australia and North America.  Given the wide range of climate and ecological conditions of these regions, "B. elongata" has been able to disrupt the ecosystems of their native plant habitats and has been label as an invasive species in many of its naturalized zones.  In North America, this species is often found as a roadside weed in the southwestern states, particularly in the state of Nevada.  Studies allude that the Cruciferae might have migrated through the Bering land bridge from what is now Central Asia.  Commonly known as the long-stalked rape or as "langtraubiger Kohl " in German, this species is a close cousin to "Brassica napus" (rapeseed) and a secondary genetic relative to "B. oleracea" (kale).  As a close genetic species of the rapeseed, the long-stalked rape has one of the highest counts of accumulated polyunsaturated linoleic and linolenic acid.  Both compounds are heavily used to manufacture vegetable oils.  "Brassica elongata" has the propagative potential of turning into a horticultural product from what is currently a noxious weed. Salvia lanigera is a small herbaceous perennial that is native from northern Egypt and Arabia, to the south of Turkey and Iran.  It grows in low altitude deserts, in sandy loam and chalky sandstone soils.  The specific epithet ""lanigera"" means "wool-bearing" or "fleecy", referring to the hairs that cover all parts of the plant.  It was first described in 1817 by Jean Louis Marie Poiret, a French clergyman sent by Louis XVI to Algeria to study the native plants.  Following the French Revolution, Poiret became a professor at the Grandes écoles in Aisne. Andropogon ternarius is a species of grass known by the common names split bluestem, splitbeard bluestem, silver bluestem, and paintbrush bluestem.  It is native to the southeastern, east-central, and south-central parts of the United States, where it occurs from New Jersey south to Florida and west to Kansas, Oklahoma, and Texas. The Eurasian otter ("Lutra lutra"), also known as the European otter, Eurasian river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia.  The most widely distributed member of the otter subfamily (Lutrinae) of the weasel family (Mustelidae), it is found in the waterways and coasts of Europe, many parts of Asia, and parts of northern Africa.  The Eurasian otter has a diet mainly of fish, and is strongly territorial.  It is endangered in parts of its range, but recovering in others. Machaeranthera is a genus of North American flowering plants in the daisy family which are known by the common name tansyaster. Pravasam is a 2008 Malayalam novel written by M. Mukundan.  According to the author, the novel is an attempt to re-define nostalgia which is thought to be the essence of life of non-resident Malayalis and to pay respect to hundreds of thousands of Malayalis living as non-resident Keralites in different parts of the world.  It is a novel that travels through generations.  It depicts a clear picture of the life stories of various persons living in various parts of the world as non-resident keralites.  It explains us about the different kinds of feelings of various kinds of people who had left their homeland for various reasons.  These reasons include the emigration for the sake of seeking a better profession, for studies, for getting a better class of living and so on.  But almost all of them dreams of returning to their homeland one day and enjoying the homeliness.  One of the issues the books addresses is the question of cultural identity of the Malayali.  A notable fact about the novel is that renowned Malayalam author S. K. Pottekkatt is a major character in the narrative.  In the beginning, the narration is given such that, story is told by Pottekkatt and after his death, it was completed by Mukundan.  Even, the narrator, himself is a non-resident keralite and has a lot of experiences to share with the readers.  Whatever amenities the emigration life had provided them, each one of them, deep in their mind had a strong desire to come back to their native land one day.  This uncontrolled emotions and sentiments of malayalis towards their homeland is clearly illustrated in the story.
Answer: Andropogon