Summary
Barleria grootbergensis I. Darbysh. & E. Tripp is described from the Grootberg Pass in Kunene Region, Namibia. Its affinities within Barleria sect. Somalia are discussed. A second taxon, named as Barleria galpinii C. B. Clarke in the Prodromus einer Flora von SüdwestAfrika, is reassessed and found to be referable to B. pseudosomalia I. Darbysh., a species previously known only from central Tanzania. A revised checklist to the Barleria of Namibia is presented.
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Acknowledgements
Fieldwork in Namibia was supported by a U.S. National Science Foundation grant to E. Tripp and L. McDade (DEB-0919594). We thank Juliet Williamson and Andrew Brown respectively for the excellent illustrations of Barleria grootbergensis and B. pseudosomalia, and Bart Wursten for permitting use of his photograph of Barleria lancifolia from Zimbabwe. At the National Botanical Research Institute, Windhoek (WIND), we thank Ezekeil Kwembeya and Esmerialda Klaassen for facilitating the fieldwork, Hendrina Hasheela and Leevi Lanyeni for field assistance during the second collecting trip, and Hendrina Hasheela for kindly checking and scanning herbarium specimens of Barleria. We thank the Ministry of Environment and Tourism for granting our research permits. Finally, two anonymous reviewers are thanked for their useful comments on an earlier draft of the manuscript.
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Appendix 1: revised and annotated checklist of Barleria in Namibia
Appendix 1: revised and annotated checklist of Barleria in Namibia
We here present an update of Craven’s (1999) list of Namibian Barleria. Synonymy is provided only where the accepted name differs from Craven’s list and/or from the earlier revision by Meyer (1968). Endemic species are marked (E); near-endemics (NE).
Sect. Barleria
(1) Barleria capitata Klotzsch
Barleria megalosiphon Mildbr. synon. nov.
(2) Barleria cyanea S. Moore
(3) Barleria damarensis T. Anderson (E)
Note. The records from Angola listed by Clarke (1899) under the synonym B. marlothii Engl. and repeated by Makholela (2008) are erroneous and refer to a taxon more closely allied to B. cyanea S. Moore.
(4) Barleria elegans S. Moore
(5) Barleria jubata S. Moore (E)
(6) Barleria lanceolata (Schinz) Oberm. (E)
(7) Barleria lichtensteiniana Nees
(8) Barleria macrostegia Nees
(9) Barleria meeuseana P. G. Mey. (E)
(10) Barleria merxmuelleri P. G. Mey. (E)
(11) Barleria papillosa T. Anderson (NE)
Note. This rare species is also recorded from near the Namibian border in South Africa.
(12) Barleria rigida Nees
Note. This species and its allies are currently under revision by F. Nyirenda and K. Balkwill (J). It is likely that more than one taxon will be recognised in Namibia since there is considerable morphological variation.
(13) Barleria solitaria P. G. Mey. (E)
Sect. Fissimura
(14) Barleria pseudosomalia I. Darbysh.
Barleria galpinii sensu Meyer (1968: 14), non C. B. Clarke
Sect. Prionitis
(15) Barleria ameliae A. Meeuse
Barleria prionitis L. subsp. ameliae (A. Meeuse) Brummitt & J. R. I. Wood
Note. Craven (1999) listed this taxon both as a good species and as a subspecies of B. prionitis; for a discussion on the appropriate taxonomic rank see Darbyshire (2010: 415).
(16) Barleria kaloxytona Lindau (E)
(17) Barleria dinteri Oberm. (NE)
Note. there are very few records of this species from South Africa. However, it is questionable as to whether it is distinct from B. coriacea Oberm. of Botswana and NE South Africa; the two might be better treated as geographic subspecies.
(18) Barleria prionitoides Engl.
Barleria prionitis L. subsp. prionitoides (Engl.) Brummitt & J. R. I. Wood
Note. Craven (1999) listed this taxon as endemic, however it is also frequent in Angola.
(19) Barleria senensis Klotzsch
Sect. Somalia
(20) Barleria grootbergensis I. Darbysh. & E. Tripp (E)
(21) Barleria lancifolia T. Anderson
(22) Barleria lugardii C. B. Clarke
(23) Barleria mackenii Hook. f.
Barleria galpinii sensu Craven (1999: 152) quoad Burgoyne 3273, non C. B. Clarke
(24) Barleria matopensis S. Moore
Barleria albi-pilosa Hainz synon. nov.
Note. Barleria albi-pilosa was accepted as an endemic species by both Meyer (1968) and Craven (1999) but this taxon is here considered to fall within the variation of the widespread B. matopensis.
(25) Barleria violacea Hainz (E)
Note. The status of this taxon, and in particular its relationship to Barleria matopensis, has not been fully assessed at the present time. The type specimen of B. violacea could be merely a depauperate form of B. matopensis.
Sect. Stellatohirta
(26) Barleria taitensis S. Moore var. occidentalis S. Moore
Barleria rogersii sensu Meyer (1968: 17) & sensu Craven (1999: 152).
Note. Varietal status seems inappropriate for this geographically as well as morphologically discrete variant of Barleria taitensis (see Darbyshire 2010: 381 for further discussion); however, the B. taitensis - B. rogersii complex is currently under revision by one of us (I. D.). As such, we here refrain from making any taxonomic changes until that revision is complete.
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Darbyshire, I., Tripp, E.A. & Dexter, K.G. A new species and a revised record in Namibian Barleria (Acanthaceae). Kew Bull 67, 759–766 (2012). https://doi.org/10.1007/s12225-012-9393-1
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DOI: https://doi.org/10.1007/s12225-012-9393-1