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Studies on the Stellaria longipes Complex (Caryophyllaceae)-Biosystematics

C. C. Chinnappa and J. K. Morton
Systematic Botany
Vol. 9, No. 1 (Jan. - Mar., 1984), pp. 60-73
DOI: 10.2307/2418408
Stable URL: http://www.jstor.org/stable/2418408
Page Count: 14
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Studies on the Stellaria longipes Complex (Caryophyllaceae)-Biosystematics
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Abstract

All populations proved to be self-compatible but most required pollination by insects. Cross-pollination led to a slightly higher seed production than selfing. Self-pollinating populations were found in two localities. Clonal material grown under different environmental conditions produced very different phenotypes; leaf shape, inflorescence development, and stature are particularly plastic. Pubescence and capsule characters are not influenced by environment; however, most wild populations were heterozygous for these characters. No correlation was found between polyploidy and morphology or taxonomy, though there were differences in pollen diameter between the main cytotypes. Crosses were produced between major cytotypes, the main variational entities, and widely separated populations. All proved successful and the progeny were fertile. The interacting roles of reproductive biology, genetic variability, and phenotypic plasticity are presented.

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