Are the plant species Quesnelia and Chlidanthus both native to South American countries?
yes
Quesnelia
Quesnelia is a genus of the botanical family Bromeliaceae, subfamily Bromelioideae.
 The genus is named For M. Quesnel, French consul to French Guiana.
 Endemic to eastern Brazil, this genus contains 22 known species.
 This genus has two recognized subgenera: the type subgenus and "Billbergiopsis" .
Chlidanthus
Chlidanthus is a genus that consists of 10 species of tender bulbs from tropical South America, mostly natives to the Andes.
 The botanical name comes from the Greek, meaning "delicate flower".
 The plants have large spherical bulbs with gray-green, strap-shaped leaves 30cm long arising from the base.
 In late spring to early summer, clusters of 3-4 large, strong citrus-scented fragrant, funnel-shaped flowers 10-13cm long held terminally on stalks 25cm high, colored in yellow, pink or red.
Anastrepha grandis
Anastrepha grandis is a fruit fly, also known as the South American cucurbit fruit fly.
 It is a pest of various cultivated species of Cucurbitaceae, especially the pumpkin, squash and melon.
 "Anastrepha grandis" is found in almost all South American countries. Cocaine paste
Coca paste (paco, basuco, oxi) is a crude extract of the coca leaf which contains 40% to 91% cocaine sulfate along with companion coca alkaloids and varying quantities of benzoic acid, methanol, and kerosene.
 In South America, coca paste, also known as cocaine base and, therefore, often confused with cocaine freebase in North America, is relatively inexpensive and is widely used by low-income populations.
 The coca paste is smoked in tobacco or cannabis cigarettes and use has become widespread in several Latin American countries.
 Traditionally, coca paste has been relatively abundant in South American countries such as Colombia where it is processed into cocaine hydrochloride ("street cocaine") for distribution to the rest of the world.
 The caustic reactions associated with the local application of coca paste prevents its use by oral, intranasal, mucosal, intramuscular, intravenous or subcutaneous routes.
 Coca paste can only be smoked when combined with a very inflammable material such as tobacco or cannabis. Union of South American Nations
The Union of South American Nations (USAN; Spanish: "Unión de Naciones Suramericanas" , UNASUR; Portuguese: "União de Nações Sul-Americanas" , UNASUL; Dutch: "Unie van Zuid-Amerikaanse Naties" , UZAN; and sometimes referred to as the South American Union) is an intergovernmental regional organization comprising 12 South American countries. Flora of Western Australia
The flora of Western Australia comprises 10,252 published native vascular plant species and a further 1,245 unpublished species.
 They occur within 1,543 genera from 211 families; there are also 1,276 naturalised alien or invasive plant species more commonly known as weeds.
 There are an estimated 150,000 cryptogam species or nonvascular plants which include lichens, and fungi although only 1,786 species have been published, with 948 algae and 672 lichen the majority. Monstera adansonii
Monstera adansonii, the Adanson's monstera or five holes plant, is a species of flowering plant from Araceae family which is widespread across much of South America and Central America.
 Besides South American countries it can also be found in the West Indies on islands such as Antigua, Grenada, Saba, St. Kitts, Guadeloupe, Marie Galante, Dominica, Martinique, St. Lucia, St. Vincent, Tobago, and Trinidad.
 The species are quite common near river valleys at lower elevations. Utricularia nana
Utricularia nana is a carnivorous plant of the Lentibulariaceae family and is the only species in the section Benjaminia.
 It is native to the South American countries of Venezuela, Guyana, Surinam, French Guinea, Brazil and Paraguay.
 It grows in swampy ground by streams and wet sandy savanna, from sea level to 1,250 m.
 The plant flowers between January and June. Dracontium spruceanum
Dracontium spruceanum is a tropical flowering plant species of the Amazon rainforest understory.
 It has been found in the South American countries of Colombia, Ecuador, Peru, Suriname, and Venezuela, as well as in the Central American countries of Costa Rica and Panama. Cusco Declaration
The Cusco Declaration, formally titled Preamble to the Foundation Act of the South American Union, is a two-page declaration of intent signed by 12 South American countries during the Third South American Summit on 8 December 2004 in Cusco, Peru.
 It announces the foundation of the Union of South American Nations.
 It called for a regional parliament, a common market and a common currency.