A revision of the 'Schoenus' clade of 'Tetraria' (Cyperaceae)
A revision of the 'Schoenus' clade of 'Tetraria' (Cyperaceae) - Southern Africa : The taxonomically complex genus 'Tetraria' has received little botanical attention, leading to confusing species boundaries for many of the taxa. Part of my postdoctoral work here in South Africa is a taxonomic revision of the 'Schoenus' clade of 'Tetrari
The taxonomically complex genus 'Tetraria' has received little botanical attention, leading to confusing species boundaries for many of the taxa. Part of my postdoctoral work here in South Africa is a taxonomic revision of the 'Schoenus' clade of 'Tetraria'. These are generally the smaller 'Tetraria' species that have no stem leaves, such as 'Tetraria cuspidata', 'Tetraria exilis', 'Tetraria compar', 'Tetraria picta', 'Tetraria sylvatica' and 'Tetraria compacta'.
I will also be including the closely-related genus 'Epischoneus' in my studies. These often inconspicuous plants can be found in wetter areas than 'Tetraria'.
Since I will also be doing chromosome counts, I am especially interested in plants that are pre-flowering (before the stamens come out).
To get an idea of the documented locations of these species, follow this link - http://www.northernbotanist.com/?page_id=1289. Please note that these locations will change as we complete the revisions on this group.
Currently accepted taxa in the clade include:
1. 'Tetraria cuspidata' (Rottb.) C.B. Clarke -- we plan to split this taxa into several different species
2. 'Tetraria ligulata' (Boeck.) C.B. Clarke / 'Tetraria autumnalis' Levyns --- there is confusion in the application of this name. We plan to work through this problem this upcoming year.
3. 'Tetraria bolusii' C.B. Clarke --- primarily off of the peninsula.
4. 'Tetraria compacta' Levyns
5. 'Tetraria crassa' Levyns
6. 'Tetraria exilis' Levyns --- a relatively small species, often about 300 mm tall
7. 'Tetraria variabilis' Levyns --- This species might be sunk into another.
8. 'Tetraria paludosa' Levyns --- a narrow-ranged species only collected from a couple of locations.
9. 'Tetraria graminifolia' Levyns - a very narrow-ranged species
10. 'Tetraria brachyphylla' Levyns
11. 'Tetraria galpinii' Schønland & Turrill --- from the Eastern Cape
12. 'Tetraria schonlandii' Turrill --- we only have one collection of this species
13. 'Tetraria cuspidata 'var. 'β lorea' Kuk --- a large 'cuspidata'-like species from the Eastern Cape. We plan to take this from variety status to a species.
14. 'Tetraria cuspidata' var. 'γ angustata' Kuk --- this could be a synonym of 'T. autumnalis', but this is yet to be resolved.
15. 'Tetraria compar' (L.) Lestib. --- a common species in the fynbos
16. 'Tetraria sylvatica' (Nees) C.B. Clarke --- we will likely split this into an eastern and western species.
17. 'Tetraria picta' (Boeck.) C.B. Clarke --- found at high elevations in the Western Cape
18. 'Tetraria sylvatica' var. 'β pseudolorea' --- this variety is nothing like 'T. sylvatica'. We intend to designate it as a species.
19. 'Tetraria sylvatica' var. 'δ triflora' --- again, this variety is nothing like 'T. sylvatica'. We intend to give it species status.
20. 'Epischoenus adnatus' Levyns
21. 'Epischoenus complanatus' Levyns --- a flat-leaved species
22. 'Epischoenus dregeanus' (Boeck.) Levyns
23. 'Epischoenus gracilis' Levyns
24. 'Epischoenus lucidus' Levyns
25. 'Epischoenus quadrangularis' (Boeck.) C.B. Clarke
26. 'Epischoenus villosus' Levyns
27. 'Schoenus nigricans' L.