Problem
Threatened species of Pteridophyta
Other Names:
Threatened species of PteridophytinaThreatened species of ferns
Background:
The pteridophytes (ferns and fern-allies) have been subdivided along a variety of different lines. The principal point of contention between various schemes for dividing pteridophytes above the family level seems to be at what point in the hierarchy are distinctions to be made. Different taxonomic systems treat the pteridophytes as a group comprising four phyla or a single phylum with four subphyla or divisions.
Broader Problems:
Threatened species of PlantaeThreatened species of cryptogamsThreatened species of vascular plants Narrower Problems:
Threatened species of PsilotophytaThreatened species of EquisetophytaThreatened species of PolypodiophytaThreatened species of Lycopodiophyta Subject(s):
Plant Life → Thallophyta, bryophyta, pteridophyta??Societal Problems → Endangered species??
Related UN Sustainable Development Goals:
Problem Type:
C: Cross-sectoral problems Date of last update
14.05.2020 – 02:46 CEST