共查询到20条相似文献,搜索用时 15 毫秒
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Gerald D. Carr Robert M. King A. Michael Powell Harold Robinson 《American journal of botany》1999,86(7):1003-1013
Chromosome numbers and other cytogenetic data were determined from microsporocytes in 316 collections including 13 tribes of Compositae, mostly from Africa, Australia, Mexico, Central America, and South America. First reports are provided for 66 species and the genera Cassinia (2n ≈ 14II), Feldstonia (2n = 11II), Gochnatia (2n ≈ 23II), and Pseudoconyza (n = 10). In addition, new chromosome numbers are established at the generic level in Acourtia, Calea, Craspedia, Gnaphalium, Helipterum, Liabum, Leucheria, Smallanthus, Trixis, and Viguiera and at the specific level in 13 additional species. 相似文献
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Viturro CI de la Fuente JR Maier MS 《Zeitschrift für Naturforschung. C, Journal of biosciences》2003,58(7-8):533-540
In addition to the known mutisicoumarin A, the aerial parts of the shrub Mutisia friesiana afforded five new methylphenones, two new 5-methylcoumarins and a new related chromone. Their structures were elucidated by spectroscopic methods 13C NMR data for mutisicoumarin A are reported for the first time. Mutisiphenones A and B and mutisicoumarin A showed antifungal activity against the phytopathogenic fungus Cladosporium cucumerinum. 相似文献
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Three native species of Baccharis are here reported to be poisonous and thus to constitute a menace to grazing cattle and sheep. 相似文献
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Nicholas Hind 《Curtis's Botanical Magazine》1996,13(4):195-199
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Nicholas Hind 《Curtis's Botanical Magazine》1996,13(4):191-194
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