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Biostatistical studies on western European Dactylorhiza (Orchidaceae) — the D. maculata group

Marc Dufrêne, Jean-Louis Gathoye and Daniel Tyteca
Plant Systematics and Evolution
Vol. 175, No. 1/2 (1991), pp. 55-72
Published by: Springer
Stable URL: http://www.jstor.org/stable/23674559
Page Count: 18
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Biostatistical studies on western European Dactylorhiza (Orchidaceae) — the D. maculata group
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Abstract

Multivariate analysis tools are exploited on a data set composed of quantitative characteristics collected on 35 populations of plants of the Dactylorhiza maculata (L.) Soó group from Western-Europe. These samples lead to four well-defined clusters; this, together with qualitative, cytological and ecological arguments, allows for the recognition of four specific entities: D. maculata s.str., D. fuchsii (Druce) Soó, D. saccifera (Brongn.) Soó and D. caramulensis (Vermeulen) Tyteca. It is concluded that the floral characters play an essential role in the taxonomical distinction. It also appears that the set of characters measured, as well as the methods exploited, are especially well-suited and valuable tools for the morphological study of the genus Dactylorhiza.

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