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<p><i>Rubus hirsutifrons</i>, a new tetraploid bramble species, classified within the subgenus <i>Rubus</i>, section <i>Rubus</i>, subsection <i>Hiemales</i>, series <i>Pallidi</i>, is described. It is a regional species endemic to central Bohemia that has so far been recorded at ca&#xa0;60 localities. The distance between its most remote localities is 76&#xa0;km. It grows scattered in the countryside, especially in marginal parts of coniferous forests and along forest roads (roadside ditches), usually as single shrubs or in small groups. The morphological variability of the species is low and indicates apomixis as the probable dominant mode of its reproduction, which is also confirmed by flow cytometric analysis of seeds. The genome size of the species corresponds with the tetraploid level. A distribution map, a list of revised herbarium specimens, a pen drawing and photographs of the species <i>in situ</i> are provided. A key to the determination of brambles of ser.&#xa0;<i>Pallidi</i> occurring in Czechia is presented.</p>

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Rubus hirsutifrons (Rosaceae), a new bramble species of the series Pallidi from central Bohemia (Czechia)

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Petr Havlíček,
  • Rudolf Hlaváček,
  • Linda Trunečková

摘要

Rubus hirsutifrons, a new tetraploid bramble species, classified within the subgenus Rubus, section Rubus, subsection Hiemales, series Pallidi, is described. It is a regional species endemic to central Bohemia that has so far been recorded at ca 60 localities. The distance between its most remote localities is 76 km. It grows scattered in the countryside, especially in marginal parts of coniferous forests and along forest roads (roadside ditches), usually as single shrubs or in small groups. The morphological variability of the species is low and indicates apomixis as the probable dominant mode of its reproduction, which is also confirmed by flow cytometric analysis of seeds. The genome size of the species corresponds with the tetraploid level. A distribution map, a list of revised herbarium specimens, a pen drawing and photographs of the species in situ are provided. A key to the determination of brambles of ser. Pallidi occurring in Czechia is presented.