A study of morphological variation in Halimione portulacoides (L.) Aell., in relation to variations in the habitat.

Abstract

Mapping and transect work at three sites in the Hampshire basin indicated that the main habitat feature affecting the distribution and quantity of Halimione protulacoides was water content of the substrate, this being the result of several factors interacting: configuration of the area, height above Ordnance Datum and nature of the substrate. Marked morphological differences were observed between plants growing on different substrates, three main types being recognised in the initial, subjective, examination: much-branched, non-rooting, prostrate, on pebble; prostrate, with much rooting, on sand; lax, upright and non-rooting, on mud. Since, with apparent relative genetical uniformity of Halimione in the Hampshire basin, there were indications of habitat differences affecting its morphology, separate objective multivariate analyses were carried out on habitat and morphology data. These analyses sho'ved that there was a high correlation betw'een habitat and the morphology of Halimione portulacoides var. latifolia, with the three 'types' forming part of a continuous series. It

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