Question: Which of the plants covers a larger part of the world, Calibrachoa or Astilboides?

<P0-S0> Calibrachoa (ca-libra-KO-a) is a genus of plants in the Solanaceae (nightshade) family. <P0-S1>  They are evergreen short-lived perennials and subshrubs with a sprawling habit, with small petunia-type flowers. <P0-S2>  They are found across much the same region of South America as petunias, from southern Brazil across to Peru and Chile, inhabiting scrub and open grassland. <SEP> <P1-S0> The Little Western Wall, also known as HaKotel HaKatan (or just Kotel Katan) and the Small Kotel, (Hebrew: הכותל הקטן‎ ‎ ), is a Jewish religious site located in the Muslim Quarter of the Old City of Jerusalem near the Iron Gate to the Temple Mount. <P1-S1>  The wall itself dates from the Second Temple period, (516 BCE – 70 CE). <P1-S2>  It is the continuation of the larger part of the Western Wall and almost exactly faces the Holy of Holies. <P1-S3>  HaKotel HaKatan is not as well-known and not as crowded as the larger part of the Western Wall. <P1-S4>  This section of the wall is of deep spiritual significance because of its close proximity to the Holy of Holies. <P1-S5>  However, it is not the closest location to the Holy of Holies, as there is a location in the Western Wall Tunnel which directly faces the Holy of Holies. <SEP> <P2-S0> Astilboides, a genus of the saxifrage family containing only one species, a herbaceous perennial once included in the genus Rodgersia. <P2-S1>  It comes from China and differs from its former relatives mainly in its leaf shape. <P2-S2>  It is grown for its huge bright green, circular leaves to 36 in (90 cm) across with the stem attached to the center, and large fluffy racemes of tiny white flowers produced in summer. <SEP> <P3-S0> Thracians or Thracian Bulgarians (Bulgarian: Тракийски българи or Тракийци) are a regional, ethnographic group of ethnic Bulgarians, inhabiting or native to Thrace. <P3-S1>  Today, the larger part of this population is concentrated in Northern Thrace, but much is spread across the whole of Bulgaria and the diaspora. <P3-S2>  Until the beginning of the twentieth century the Thracian Bulgarians lived also in the whole of Thrace, then part of the Ottoman Empire. <P3-S3>  After the persecutions during the Preobrazhenie Uprising and the ethnic cleansing, caused to the Bulgarian population in Eastern Thrace after the Second Balkan War, these people were expelled from the area. <P3-S4>  After World War I, Bulgaria was required to cede Western Thrace to Greece. <P3-S5>  A whole population of Bulgarians in Western Thrace was expelled into Bulgaria-controlled Northern Thrace. <P3-S6>  This was followed by a further population exchange between Bulgaria and Greece (under the Treaty of Neuilly-sur-Seine), which radically changed the demographics of the region toward increased ethnic homogenization within the territories each respective country ultimately was awarded. <P3-S7>  At this period the Bulgarian Communist Party was compelled by Comintern to accept the formation of a new "Thracian nation" on the base of this people in order to include them in a new separate "Thracian state", as a part of a future Balkan Communist Federation.