Question: Of the two flowering plants Eriogonum and Ascocenda, is one natural and the other man-made?

Context articles: Senecio squalidus
Eudicots
Antarctic realm
Mary Bowerman
Baho-baho
Dicotyledon
Deschampsia antarctica
Eriogonum
Ascocenda
1177 B.C.: The Year Civilization Collapsed

Senecio squalidus, known as Oxford ragwort, is a flowering plant in the daisy family Asteraceae.
 It is a yellow-flowered herbaceous plant, native to mountainous, rocky or volcanic areas, that has managed to find other homes on man-made and natural piles of rocks, war-ruined neighborhoods and even on stone walls.
 These habitats resemble its well drained natural rocky homeland.
 The plants have spread via the wind, rail and the activities of botanists.
 The travels and discriminative tendencies regarding propagation of this short-lived perennial, biennial, or winter annual make it a good subject for studies of the evolution and ecology of flowering plants.
The eudicots, Eudicotidae or eudicotyledons are a monophyletic clade of flowering plants that had been called tricolpates or non-magnoliid dicots by previous authors.
 The botanical terms were introduced in 1991 by evolutionary botanist James A. Doyle and paleobotanist Carol L. Hotton to emphasize the later evolutionary divergence of tricolpate dicots from earlier, less specialized, dicots.
 The close relationships among flowering plants with tricolpate pollen grains was initially seen in morphological studies of shared derived characters.
 These plants have a distinct trait in their pollen grains of exhibiting three colpi or grooves paralleling the polar axis.
 Later molecular evidence confirmed the genetic basis for the evolutionary relationships among flowering plants with tricolpate pollen grains and dicotyledonous traits.
 The term means "true dicotyledons", as it contains the majority of plants that have been considered dicots and have characteristics of the dicots.
 The term "eudicots" has subsequently been widely adopted in botany to refer to one of the two largest clades of angiosperms (constituting over 70% of the angiosperm species), monocots being the other.
 The remaining angiosperms include magnoliids and what are sometimes referred to as basal angiosperms or paleodicots, but these terms have not been widely or consistently adopted, as they do not refer to a monophyletic group.
Antarctica is one of eight terrestrial biogeographic realms.
 The ecosystem includes Antarctica and several island groups in the southern Atlantic and Indian Oceans.
 The continent of Antarctica is so cold and dry that it has supported only 2 vascular plants for millions of years, and its flora presently consists of around 250 lichens, 100 mosses, 25-30 liverworts, and around 700 terrestrial and aquatic algal species, which live on the areas of exposed rock and soil around the shore of the continent.
 Antarctica's two flowering plant species, the Antarctic hair grass ("Deschampsia antarctica") and Antarctic pearlwort ("Colobanthus quitensis"), are found on the northern and western parts of the Antarctic Peninsula.
 Antarctica is also home to a diversity of animal life, including penguins, seals, and whales.
Mary Leolin Bowerman (January 25, 1908 – August 21, 2005) was an American botanist, co-author of "The Flowering Plants and Ferns of Mount Diablo, California; Their Distribution and Association into Plant Communities""," and the co-founder of Save Mount Diablo.
 She helped to preserve tens of thousands of acres of Mount Diablo in the San Francisco East Bay before dying at age 97.
 In 1936 she was the last person to record the Mount Diablo buckwheat "Eriogonum truncatum," until it was rediscovered nearly seventy years later on May 10, 2005.
 In 1978 the manzanita "Arctostaphylos bowermaniae" was named in her honor.
Baho-baho is Filipino for 'smelly'.
 It is the common name of two flowering plants known for their pungent odors.
The dicotyledons, also known as dicots (or more rarely dicotyls), were one of the two groups into which all the flowering plants or angiosperms were formerly divided.
 The name refers to one of the typical characteristics of the group, namely that the seed has two embryonic leaves or cotyledons.
 There are around 200,000 species within this group.
 The other group of flowering plants were called monocotyledons or monocots, typically having one cotyledon.
 Historically, these two groups formed the two divisions of the flowering plants.
Deschampsia antarctica (Antarctic hair grass) is one of two flowering plants native to Antarctica, the other being "Colobanthus quitensis" (Antarctic pearlwort).
Eriogonum is the scientific name for a genus of flowering plants in the family Polygonaceae.
 The genus is found in North America and is known as wild buckwheat.
 This is a highly species-rich genus, and indications are that active speciation is continuing.
 It includes some common wildflowers such as the California buckwheat ("Eriogonum fasciculatum").
× Ascocenda, abbreviated as Ascda in the horticultural trade, is a man-made hybrid orchid genus resulting from a cross between "Ascocentrum" and "Vanda" (Asctm × V).
 It was first described in Orchid Rev. 57: 172 (1949).
1177 B.C.: The Year Civilization Collapsed is a nonfiction ancient history book written by Eric H. Cline and published in 2014 by Princeton University Press.
 The book focuses on his hypothesis for the Late Bronze Age collapse of civilization, a transition period that affected the Egyptians, Hittites, Canaanites, Cypriots, Minoans, Mycenaeans, Assyrians and Babylonians; varied heterogeneous cultures populating eight powerful and flourishing states intermingling via trade, commerce, exchange and "cultural piggybacking", despite "all the difficulties of travel and time".
 He presents evidence to support a "perfect storm" of "multiple interconnected failures", meaning that more than one natural and man-made cataclysm caused the disintegration and demise of an ancient civilization that incorporated "empires and globalized peoples".
 This ended the Bronze Age, and ended the Mycenaean, Minoan, Trojan, Hittite, and Babylonian cultures.
 Before this book, the leading hypothesis during previous decades attributed the civilization collapse mostly to Sea Peoples of unknown origin.