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. 2019 Jan;26(1):57-65.
doi: 10.1016/j.sjbs.2016.12.022. Epub 2017 Jan 3.

Systematic studies on the Zygophyllaceae of Saudi Arabia: Two new subspecies combination in Tetraena Maxim

Dhafer Ahmed Alzahrani  1
Affiliations

Systematic studies on the Zygophyllaceae of Saudi Arabia: Two new subspecies combination in Tetraena Maxim

Dhafer Ahmed Alzahrani. Saudi J Biol Sci. 2019 Jan.

Abstract

Tetraena propinqua (Decne.) Ghazanfar and Osborne ssp. propinqua Alzahrani, and Tetraena propinqua (Decne.) Ghazanfar and Osborne ssp. migahidii (Hadidi ex Beier & Thulin) Alzahrani, are described and illustrated as new subspecies combination nova from Saudi Arabia. The diagnostic characters, description, detailed illustrations, geographical distribution, key to subspecies and taxonomic discussion are provided. The similarities and significant differences between the two subspecies are confirmed by PCoA and UPGMA analyses. The World Conservation Union (IUCN) threatened category and observations on the population are noted.

Keywords: PCoA; Saudi Arabia; Taxonomy; Tetraena; Tetraena propinqua; UPGMA; Zygophyllaceae.

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Figures

Figure 1
Figure 1
A distribution map of Tetraena propinqua subspecies in Saudi Arabia: T. propinqua ssp. propinquaformula image, T. propinqua ssp. migahidiiformula image.
Figure 2
Figure 2
PCoA representation of morphological data of 25 accessions of Saudi Arabian T. propinqua plants using Gower’s general similarity coefficient (Gower, 1966). (A) Principal coordinates axis 1 and 2. (B) Principal coordinates axis 1 and 3. Different symbols correspond to different subspecies as shown in the inserted legends. Clusters are indicated by numbers.
Figure 3
Figure 3
UPGMA analysis representation of morphological data of 25 accessions of Saudi Arabian Tetraena propinqua subspecies plantsusing Gower’s general similarity coefficient (Gower, 1966). Roman numerals are used to identify the clusters.
Figure 4
Figure 4
Morphological characters variations in leaves and fruits of Tetraena propinqua subspecies. (A) leaf shape of T. propinqua ssp. propinqua, (B) fruit shape of T. propinqua ssp. propinqua, (C) capsule lobe shape of T. propinqua ssp. propinqua, (D) leaf shape of T. propinqua ssp. migahidii, (E) fruit shape of T. propinqua ssp. migahidii, (F) capsule lobe shape of T. propinqua ssp. migahidii.
Figure 5
Figure 5
General leaves, flowers and fruits of Tetraena propinqua subspecies. (A) leaves, flowers and fruits of T. propinqua ssp. propinqua, (B) leaves and fruits of T. propinqua ssp. propinqua, (C) leaves, flowers and fruits of T. propinqua ssp. migahidii, (D) leaves and fruits of T. propinqua ssp. migahidii.
See this image and copyright information in PMC

References

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