Clutch size in the Compositae

  • D. A. Levin
  • B. L. Turner
Chapter

Abstract

The number and sizes of seeds produced by plants of different species have exercised the minds of plant evolutionists and ecologists for decades. Seed size is relatively constant within species but may vary greatly between species (Salisbury, 1942; Harper, Lovell and Moore 1970). Seed number is subject to very great phenotypic modification, but mean seed number may vary substantially between species. The importance of seed size and numbers in relation to seedling survival and to the ability of populations to replace themselves in time and space was first realised by Salisbury (1942) and amplified by Harper et al., (1970), Janzen (1971), Baker (1972) and Levin (1974).

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© The contributors 1977

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  • D. A. Levin
  • B. L. Turner

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