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Heterolepis
''Heterolepis'' is a genus of flowering plants in the sunflower family.〔Per Ola Karis. 2007. "Arctotideae" pages 200-207. In: Klaus Kubitzki (series editor); Joachim W. Kadereit and Charles Jeffrey (volume editors). ''The Families and Genera of Vascular Plants'' volume VIII. Springer-Verlag: Berlin; Heidelberg, Germany. ISBN 978-3-540-31050-1〕 It has three〔David J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. ISBN 978-0-521-82071-4〕 or four species, all endemic to the Western Cape Province in South Africa.
''Heterolepis'' species are shrublets, typically sprawling and about 30 cm high with moderately large yellow flowers. The flowerheads are solitary with glandular peduncles, the surrounding green bracts having membranous margins, especially in the inner rows. The ray florets are female, with a thread-like lobe opposite the ray. The disk florets are bisexual. The seeds (properly speaking the fruits) are flask-shaped, silky, with a pappus of two unequal rows of bristly, barbed scales. The leaves are alternate, typically 15–30 mm long, narrow or needle-like, sharply pointed, thick, and quite stiff, with the margins rolled under, woolly beneath. The rootstock is woody, and branches cobwebby. The plants occur mainly on rocky sandstone slopes in the mountains of the Western Cape in South Africa.〔
The name ''Heterolepis'' is derived from two Greek words, ''heteros'' "different, dissimilar" and ''lepis'' "a scale".〔Umberto Quattrocchi. 2000. ''CRC World Dictionary of Plant Names'' volume II. CRC Press: Boca Raton; New York; Washington,DC;, USA. London, UK. ISBN 978-0-8493-2676-9 (vol. II). (see ''External links'' below).〕 This name was created in 1820 by Alexandre de Cassini 〔''Heterolepis'' at the International Plant Names Index. (see ''External links'' below).〕〔Alexandre H.G. de Cassini. 1820. ''Bulletin des Sciences, par la Société Philomatique de Paris'' 1820:26.〕 for a plant that had been named ''Arnica inuloides'' 〔''Arnica'' At: International Plant Names Index. (see ''External links'' below).〕 by Martin Vahl in 1791.〔Martin Henrichsen Vahl. 1791. ''Symbolae Botanicae'' part 2:91.〕 One year after transferring this species to ''Heterolepis'', Cassini changed the specific epithet, thus creating the superfluous combination ''Heterolepis decipiens'' in 1821.〔Alexandre H.G. de Cassini. 1821. ''Dictionnaire des Sciences Naturelles, ··· . Strasbourg. edition 2. (F. Cuvier). 21:120.〕
The relationships of ''Heterolepis'' to other genera in Asteraceae are not well understood. It is related to the tribe Arctotideae. Some authors have placed it within that tribe as a matter of convenience until more can be learned about it.〔Vicki A. Funk, Alfonso Susanna, Tod F. Stuessy, and Randall J. Bayer. 2009. ''Systematics, Evolution and Biogeography of the Compositae''. IAPT (International Association for Plant Taxonomy). ISBN 978-3-9501754-3-1 (see ''External links'' below).〕
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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