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Senecio coincyi (Asteraceae) is a threatened endemic plant of central western  Spain. The reproductive biology of this species in relation to the  characteristics of its habitats and the possible strategies for its  conservation, were studied. The area of occupancy, habitat types and size of  13 known subpopulations of S. coincyi was evaluated. Germination tests were  carried out to assess the effect of temperature and light regimes, and the  possible intraspecific variation on the cypsela germination. Cypselas reached  very high germination percentages (90-100%) from 15ºC to 30ºC. However, the  germination decreased (by about 19%) at 10ºC. The light conditions assayed  did not significantly affect cypsela germination. In conclusion, S. coincyi  showed high sexual reproduction ability, and therefore its conservation  problems are not due to agents related to its reproductive biology, but to  others, such as the alteration of its habitat caused by the presence of  livestock

archives of biological sciences

Evaluation of reproductive success and conservation strategies for Senecio coincyi (Asteraceae), a narrow and threatened endemic plant of central western Spain