ON THE INTRASPECIFIC VARIABILITY OF DRYOPTERIS ASSIMILIS S. WALKER AND DRYOPTERIS SPINULOSA WATT
2009; BioMed Central; Volume: 62; Issue: 1-2 Linguagem: Inglês
10.1111/j.1601-5223.1969.tb02220.x
ISSN1601-5223
AutoresCarl‐Johan Widén, Veikko Sorsa,
Tópico(s)Plant and animal studies
ResumoS far as is known at present, the diploid level of the Dryopteris A spinulosa complex consists of five taxa.Two of them, D. rnaderensis Alston and D. assirnilis S. Walker, are from the Old World, and three, D. intermedia (Muhl.) A. Gray as well as D ."dilatata" (Hoffm.) A. Gray from the Lake Superior region and D. "dilatrcta" from the western states, are North American taxa.Because of their higher degree of polyploidy, the tetraploid taxa of the D. spinulosa complex would be expected to be the most variable.This seems to be true of the taxon D. campgloptera Clarkson (WAGNER and HAGENAH, 1962; WAGNER, 1963).Analogously the tetraploid taxon D. dilatata in Central Europe is obviously more variable than the diploid taxon D. assirnilis from the same region (S.WALKER and JERMY, 1964;GATZI, 1966).In North America is D. spinulosa, on the contrary, less variable than D. intermedia (TRYON and BRITTON, 1962;BRITTON and SOPER, 1966).In Finland, however, the morphological variation (WIDEN, SARVELA and AHTI, 1967) and likewise the chemical variation of the phloroglucinol derivatives (WIDEN and SORSA, 1966; WIDEN, 1967 a, b;SORSA and WIDEN, 1968) has proved to be greatest in the diploid taxon D. assirnilis.In this study the intraspecific variability of D. assirnilis and D. spinulosa in Finland has been examined by chromatographic and cytological methods.Comparative chromatographic studies have also been CARL-JOHAN WIDEN AND VEIKKO SORSA Species D. assirnilis D. assirnilis "uar.pseudospinulosa" D. "dilalata" ( n = 41
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