Senecio

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Senecio

 

a genus of plants of the family Compositae. Members are perennial, annual, or biennial herbs, shrubs, and arborescent plants (including rosetted trees). The flowers are yellow, orange, purple, or violet; the marginal ones are ligulate and carpellary and the median ones, tubular monoclinous and gathered into calathides; the involucres are for the most part monostichous. There are more than 1,500 (according to other data, as many as 3,000) species; they are ubiquitous, but mainly found in South Africa, the Mediterranean, and temperate regions of Asia and America.

There are approximately 100 species in the USSR. Senecio vulgaris grows mainly as a weed near dwellings, in gardens, and in planted fields. S. jacobaea is found along forest edges and in shrubbery, wastelands, and fields. S. rhombifolius (formerly S. platyphyllus) grows in the Caucasus and is a medicinal plant; all its parts contain alkaloids (platyphyllin and sarracin, for example) that are used as spasmolytic and analgesic agents. Many species of Senecio are cultivated as ornamentals; some are sometimes assigned to the genus Cineraria.

REFERENCE

Shishkin, B. K. “Rod Senecio L.” In Flora SSSR, vol. 26. Moscow-Leningrad, 1961.

T. V. EGOROVA

References in periodicals archive ?
Testing a metapopulation model of coexistence in the insect community on ragwort (Senecio jacobaea).
Disturbance, competition, and herbivory effects on ragwort Senecio jacobaea populations.
Dens Leonis qui pilosella folio minus villoso: Doria quae Jacobaea orientalis limonii folio: Titanokeratophyton quod Lithophyton marinum albicans.
Wind dispersal distances in dimorphic achenes of ragwort, Senecio jacobaea. Ecology 68:2006-2015.
Economic and regional benefits from the biological control of tansy ragwort, Senecio jacobaea, in Oregon, pp.
Roedd 'na gryn dipyn o lysiau'r gingroen (Senecio jacobaea; Common Ragwort) a'r amranwen arfor (Tripleurospermum maritimum; Sea Mayweed) o gwmpas.
Juncus rugosus + Companeras: Senecio jacobaea + en 2; Populus nigra y Panicum repens 1 en 5; Juncus articulatus 2, Imperata cylindrica 1, Lonicera periclymenum subsp.
Tackling speciose genera: species composition and phylogenetic position of Senecio sect, Jacobaea (Asteraceae) based on plastid and nrDNA sequences.
Germination of Senecio jacobaea was inhibited in full light on the sand surface where moisture levels were reduced (van der Meijden and van der Waals-Kooi, 1979).
Positive and negative effects of herbivory on the population dynamics of Senecio jacobaea L.