Results 171 to 180 of about 1,068 (211)

The genus Athroisma (Asteraceae, Heliantheae)

Botanical Journal of the Linnean Society, 1995
The palaeotropical genus Athroisma (Asteraceae, Heliantheae) is revised for the first time, and its general morphology is described. Twelve species and two subspecies distributed in East Tropical Africa, Madagascar, and in Asia from north-eastern India to the Sunda Islands are recognized. Four new species are described ( A.
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Systematics of Spilanthes (Compositae: Heliantheae)

Systematic Botany, 1981
Spilanthes is widespread throughout the New and Old World tropics. Morphological and chromosomal evidence supports separation of the genus into two genera, Spilanthes and Acmella, which can be distinguished by at least eight morpho- logical characters and by distinctive basic chromosome numbers.
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Acetylenes and related compounds in heliantheae

Phytochemistry, 1991
Abstract In this review acetylenes and related compounds, such as thiophenes, alkamides, unsaturated alkyl ketones and hydrocarbons, which have been isolated from the tribe Heliantheae (Asteraceae) are listed. Some of these compounds are widely distributed in Asteraceae, especially in the tribes Anthemideae, Cynareae, Helenieae and Inuleae.
Jørgen Lam, Lars Porskjær Christensen
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Systematic study of the genusDelilia (Asteraceae, Heliantheae) [PDF]

Plant Systematics and Evolution, 1995
A taxonomic study of the genusDelilia is presented. Two species are recognized:D. biflora, a widespread weed of tropical and subtropical regions of the New World, extending from Mexico to northern Argentina and recently introduced in the Cape Verde Islands; andD. repens, endemic to the Galapagos islands.
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Chemotaxonomic analysis of Pappobolus (Asteraceae: Heliantheae)

Biochemical Systematics and Ecology, 1992
Abstract Chemical constituents from capitate glandular trichomes were analyzed for 33 of the 38 species of Pappobolus. In total, 35 HPLC peaks were detected, 30 of which could be tentatively assigned to known compounds of the sesquiterpene lactone and benzofuran type.
Jose L. Panero, Otmar Spring, Edward E. Schilling   +2 more
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A phylogeny of the ITS and ETS for Montanoa (Asteraceae: Heliantheae)

Molecular Phylogenetics and Evolution, 2004
A phylogeny of the genus Montanoa based on the internal transcribed spacer (ITS) and the external transcribed spacer (ETS) is presented. Each of the two clades revealed by the Bayesian and parsimony analyses has approximately half of the number of species in the genus.
Anne Plovanich, Jose L. Panero
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CHROMOSOME NUMBERS IN COMPOSITAE VIII: HELIANTHEAE

American Journal of Botany, 1972
One hundred and ninety‐three new counts are reported for the tribe Heliantheae of Compositae, mostly based on determinations of meiotic material, including first counts for the genera Adenothamnus, Chrysogonum, Enceliopsis, Guardiola, Isocarpha, Lipochaeta, Otopappus, and Oyedaea, as well as first counts for 66 species.
Donald W. Kyhos, Otto T. Solbrig, Peter H. Raven, Michael Powell   +3 more
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Chemistry of the Heliantheae (Compositae)

1990
In connection with the separation of the Heliantheae into subtribes, the relevant chemistry is discussed briefly. The different types of sesquiterpene lactones and polyacetylenes are the most characteristic features. However, in several groups other constituents are also useful. Still, not in all cases chemistry allows for a clear differentiation.
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Taxonomy ofNeurolaena (Asteraceae-Heliantheae)

Plant Systematics and Evolution, 1982
A taxonomic treatment of the tropical genusNeurolaena (tribeHeliantheae, subtribeGalinsoginae) is rendered. Ten species are recognized: the widespread, annual, weedy,N. lobata and nine relatively rare, relictual, shrubby or small tree species, mostly restricted to southern Mexico and Central America.
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Expansion of Lundellianthus (Compositae: Heliantheae)

Systematic Botany, 1989
Transfers of Lasianthaea belizeana, Lasianthaea breedlovei, Otopappus jaliscensis, Oyedaea steyermarkii, Zexmenia guatemalensis, Zexmenia kingii, and Zexmenia salvinii require new combinations: Lundellianthus belizeanus, L. breedlovei, L. jaliscensis, L. guatemalensis, L. kingii, L. salvinii, and L. steyermarkii. Addition of L.
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