The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species
Background: The Rhynchosia totta complex is one of three taxonomically complicated African groups in the genus Rhynchosia. Numerous southern African species and infraspecific taxa (at least 19 names, 17 species and 2 varieties) have been described by various authors in the past, but were later reduc...
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| Format: | Article |
| Language: | English |
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South African National Biodiversity Institut
2016-09-01
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| Series: | Bothalia: African Biodiversity & Conservation |
| Subjects: | |
| Online Access: | https://abcjournal.org/index.php/abc/article/view/2041 |
| _version_ | 1819155701305442304 |
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| author | Annah N. Moteetee M. Marianne Le Roux |
| author_facet | Annah N. Moteetee M. Marianne Le Roux |
| author_sort | Annah N. Moteetee |
| collection | DOAJ |
| description | Background: The Rhynchosia totta complex is one of three taxonomically complicated African groups in the genus Rhynchosia. Numerous southern African species and infraspecific taxa (at least 19 names, 17 species and 2 varieties) have been described by various authors in the past, but were later reduced into synonymy with R. totta. Currently, only the typical variety is recognised in Southern Africa.
Objectives: To investigate and update the circumscription of the taxa within the R. totta complex in southern Africa and to update their synonymies and distribution ranges.
Methods: Specimens of R. totta at GRA, JRAU, K, NH and PRE were studied and compared, and measurements of characters recorded. Populations were also observed during field studies.
Results: The examination of numerous specimens, as well as field investigations, has prompted the recognition of four varieties (one described here as new: R. totta var. longicalyx) and a new species (R. pedunculata) in southern Africa.
Conclusions: A great variation in leaf structure and vestiture occurs within the R. totta complex, with the extreme forms easily recognisable. However, the total number of varieties are limited to four [R. totta vars. totta, longicalyx, rigidula and venulosa] and a new species described to accommodate specimens with a distinctly prostrate habit and upwardly directed leaves. |
| first_indexed | 2024-12-22T15:41:09Z |
| format | Article |
| id | doaj.art-0badbd0557f34d7a8ac6f9b862ceccdc |
| institution | Directory Open Access Journal |
| issn | 0006-8241 2311-9284 |
| language | English |
| last_indexed | 2024-12-22T15:41:09Z |
| publishDate | 2016-09-01 |
| publisher | South African National Biodiversity Institut |
| record_format | Article |
| series | Bothalia: African Biodiversity & Conservation |
| spelling | doaj.art-0badbd0557f34d7a8ac6f9b862ceccdc2022-12-21T18:21:07ZengSouth African National Biodiversity InstitutBothalia: African Biodiversity & Conservation0006-82412311-92842016-09-01461e1e1910.4102/abc.v46i1.20411859The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new speciesAnnah N. Moteetee0M. Marianne Le Roux1Department of Botany and Plant Biotechnology, University of JohannesburgDepartment of Botany and Plant Biotechnology, University of Johannesburg and South African National Biodiversity Institute (SANBI)Background: The Rhynchosia totta complex is one of three taxonomically complicated African groups in the genus Rhynchosia. Numerous southern African species and infraspecific taxa (at least 19 names, 17 species and 2 varieties) have been described by various authors in the past, but were later reduced into synonymy with R. totta. Currently, only the typical variety is recognised in Southern Africa. Objectives: To investigate and update the circumscription of the taxa within the R. totta complex in southern Africa and to update their synonymies and distribution ranges. Methods: Specimens of R. totta at GRA, JRAU, K, NH and PRE were studied and compared, and measurements of characters recorded. Populations were also observed during field studies. Results: The examination of numerous specimens, as well as field investigations, has prompted the recognition of four varieties (one described here as new: R. totta var. longicalyx) and a new species (R. pedunculata) in southern Africa. Conclusions: A great variation in leaf structure and vestiture occurs within the R. totta complex, with the extreme forms easily recognisable. However, the total number of varieties are limited to four [R. totta vars. totta, longicalyx, rigidula and venulosa] and a new species described to accommodate specimens with a distinctly prostrate habit and upwardly directed leaves.https://abcjournal.org/index.php/abc/article/view/2041Cajanineaemorphologynew speciesRhynchosiataxonomic studiestypification |
| spellingShingle | Annah N. Moteetee M. Marianne Le Roux The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species Bothalia: African Biodiversity & Conservation Cajanineae morphology new species Rhynchosia taxonomic studies typification |
| title | The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species |
| title_full | The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species |
| title_fullStr | The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species |
| title_full_unstemmed | The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species |
| title_short | The <i>Rhynchosia totta</i> complex (Phaseoleae, Fabaceae) in Southern Africa, including the description of a new variety and new species |
| title_sort | i rhynchosia totta i complex phaseoleae fabaceae in southern africa including the description of a new variety and new species |
| topic | Cajanineae morphology new species Rhynchosia taxonomic studies typification |
| url | https://abcjournal.org/index.php/abc/article/view/2041 |
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