Variation in Oxyria digyna

Jindřich Chrtek 1 & Michaela Šourková 2

Affiliations

  1. Botanical Department of the National Museum, 252 43 Průhonice, Czechoslovakia
  2. Department of Botany, Charles University, Benátská 2, 128 01 Praha 2, Czechoslovakia
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Abstract

A detailed analysis of the herbarium material of Oxyria digyna (L.) Hill deposited in PR and PRC showed that this species could be divided into two different species: O. digyna (L.) Hill s. str. and O. caucasica Chrtek et Šourková spec. nova. The new species has anthers 0.9- 1.3 (-1.5) mm long and fruits (4.5-) 5.0-6.5 mm wide. For the present time O. caucasica is known from the Caucasus, Elburz Mts., mountains of northern Iraq and probably from the Tian Shan. The species shows only a little variation. On the other hand, O. digyna s. str. is widespread and accordingly, a greater morphological variation was found in this species. Different chromosome numbers were found: 2n = 42 in O. caucasica and 2n = 14 in O. digyna s. str.

Keywords

Polygonaceae, Oxyria digyna, O. caucasica, morphology, chorology

How to cite

Chrtek J., Šourková M. (1992) Variation in Oxyria digyna. – Preslia 64: 207–210