Question: Dahlia and Aruncus are both examples of what type of plant catagorization?

<P0-S0> Aruncus dioicus (Walt.) <P0-S1>  (known as goat's beard, buck's-beard or bride's feathers) is a flowering herbaceous perennial plant in the family Rosaceae, and is the type species of the genus "Aruncus". <P0-S2>  It has alternate, pinnately compound leaves, on thin, stiff stems, with plumes of feathery white or cream flowers borne in summer. <P0-S3>  This plant can be found in moist woodland, often at higher altitudes, throughout temperate areas of Europe, Asia, and eastern and western North America. <P0-S4>  In the UK it is considered suitable for planting in and around water areas, and has gained the Royal Horticultural Society's Award of Garden Merit. <SEP> <P1-S0>  Botanical opinion of the number of species differs, with from one to four species accepted. <P1-S1>  They are closely related to the genera "Filipendula" and "Spiraea", and are native to mountainous damp woodland in temperate regions of the Northern Hemisphere. <P1-S2> Aruncus is a genus of clump forming herbaceous perennial plants in the family Rosaceae. <P1-S3>  Creamy white plumes of flowers are produced above veined and toothed leaflets. <SEP> <P2-S0>  A member of the Asteraceae (or Compositae), dicotyledonous plants, related species include the sunflower, daisy, chrysanthemum, and zinnia. <P2-S1> Dahlia ( or ) is a genus of bushy, tuberous, herbaceous perennial plants native to Mexico. <P2-S2>  There are 42 species of dahlia, with hybrids commonly grown as garden plants. <P2-S3>  Flower forms are variable, with one head per stem; these can be as small as 2 in diameter or up to 1 ft ("dinner plate"). <P2-S4>  This great variety results from dahlias being octoploids—that is, they have eight sets of homologous chromosomes, whereas most plants have only two. <P2-S5>  In addition, dahlias also contain many transposons—genetic pieces that move from place to place upon an allele—which contributes to their manifesting such great diversity. <SEP> <P3-S0> The Ayla-Axum amphorae are narrow conical amphoras that were named after the widest range of finds in the Red Sea. <P3-S1>  Subsequent findings since the mid- 1990s indicate, however, that the amphoras originate in Byzantine, or even early Islamic, Aqaba. <P3-S2>  Hence, the preferred nomenclature is now "Aqaba Amphora." <P3-S3>  The Ayla-Axum/Aqaba amphora type has parallels from at least three terrestrial sites in Eritrea and Ethiopia: Aksum, where amphora sherds with gray fabric were found by the Deutsche Aksum Expedition (Zahn 1913: 208); Matara dating to the 4th through 7th centuries (Anfray 1990: 118); and Adulis (Paribeni 1907: 551) examples of which are on display in the National Museum in Asmara. <P3-S4>  Other examples have been found at Berenike in Egypt, where the amphoras date firmly to an early 5th century context in what may be the best stratified examples (Hayes 1996: 159-61); from Aqaba in Jordan where many examples have been found, including their kilns; on The Shipwreck at Black Assarca Island, Eritrea (Pedersen 2008; Pedersen 2000); and in the Mediterranean such as on the late 6th-century shipwreck at Iskandil Burnu, Turkey, as well as in Spain and Carthage in strata datable from the mid-fourth to the sixth centuries (Keay 1986: 356, 358, 471). <P3-S5>  The largest number (c. 500) came to light during excavations at Zafar/Yemen.