Skip to main content
SpringerLink
Log in

Some fundamental problems of taxonomy and phylogenetics

  • Published:
The Botanical Review Aims and scope Submit manuscript

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

References

  1. Throughout this and a subsequent article I shall, for the sake of brevity, use the term “Scandinavia” as comprising Denmark, Finland—Suomi, Norway and Sweden, together with the adjacent parts of U.R.S.S.—Kola and Karelia.

  2. The isolation between forms may be ecological as well as geographical; it may even be chronological if the populations have different flowering seasons. A very interesting example of this has recently been described by Iversen (1936: 55). Such cases, which we might call chronotypes, must not be confused with those of seasonal dimorphism which are connected with differences in the number of chromosomes (Fagerlind 1936), as such forms are probably incompatible, nor with the case described by Müntzing (1931) where the second generation is formed simply by the innovation shoots of the first one.

  3. This is very important and sometimes overlooked by geneticists. A gene exchange that can take place through a more or less tender and delicate hybrid that must be nursed in experimental plots, is no gene exchange at all in nature and is of no interest whatsoever for the question of natural species delimitation. Experience has shown that even when the hybrid is so vital and fertile as Geum intermedium (=G. rivale × urbanum), no gene exchange seems to take place in nature; hybrid populations are always rather small and well defined (cp. discussion after Clausen 1936).

  4. A Danish author has maintained that S. laurina of Heribert Nilsson could not have arisen in this way. The challenge has, however, been demonstrated to be based upon quite false premises (Heribert Nilsson 1935b).

  5. Fagerlind has pointed out (1934) that hybrids between autotetraploids should be completely fertile and constitute new species.

Download references

Author information

Authors and Affiliations

  1. Bergen, Norway

    Knut Fægri

Authors
  1. Knut Fægri
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Fægri, K. Some fundamental problems of taxonomy and phylogenetics. Bot. Rev 3, 400–423 (1937). https://doi.org/10.1007/BF02870489

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02870489

Keywords

Search

Navigation