A New Combination for the Single American Element of Parasenecio (Asteraceae: Senecioneae)
1993; Missouri Botanical Garden Press; Volume: 3; Issue: 2 Linguagem: Inglês
10.2307/3391524
ISSN1945-6174
Autores Tópico(s)Plant Taxonomy and Phylogenetics
ResumoIn accordance with the acceptance of the generic name Parasenecio for the Asiatic-cen¬ tered species historically referred to Cacalia, a new combination is made for the single species that rang¬ es to North America: Parasenecio auriculata (A.P. de Candolle) J. R. Grant.Cacalia auriculata was described by A. P. de Candolle (1837) from a specimen collected in 1835 by Turczaninow between Yakutsk and Okhotsk, Yakutia, Russia.It ranges from Kamtchatka to the Commander and Kurile Islands (Russia), to Hok¬ kaido and northern Honshu (Japan), and from the Russian Far East to Manchuria (China) and Korea (Hulten, 1930).In Alaska, it has been collected on five islands at the westernmost end of the Aleutian chain roughly adjacent to the Commander Islands, Attu, Agattu, and Alaid of the Near Islands, and Kiska and Buldir of the Rat Islands.Cacalia auriculata is one of a number of species of primarily Asiatic distribution that ranges to the westernmost islands of the Aleutian chain.Hulten (1937) documented the American range for several species with this type of distribution pattern includ¬ ing Senecio palmatus Pallas and Cirsium kamtchaticum Ledebour.The vegetation of the islands where these species are found is "a distinctly Kamtchatkan type" (Hulten, 1937: 37).The presence of these species in the Aleutians is due to their association with "high-grown vegetation" typical of Kamchatka that also extends to the Near and Rat Island groups, but is unknown to the remainder and majority of the Aleutian chain (Hulten, 1937).Robinson & Brettell (1973) described the genus Koyamacalia for the Asian species referred to Ca¬ calia.Cacalia auriculata was transferred into Koy¬ amacalia along with 46 other species (Robinson & Brettell, 1973).Jeffrey & Yi-Ling (1984) pointed out that Koyamacalia H. E. Robinson & R. I).Brettell was a later synonym of Parasenecio W. W. Smith & Small.Jeffrey (1992
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