South African Journal of Botany 77 (2011) 251–252 www.elsevier.com/locate/sajb

Research note The identity of the type of Tanacetum burchellii DC. (, ), and the correct author citation for punctata Harv. ex Hutch. ⁎ A.R. Magee

South African National Biodiversity Institute, Compton Herbarium, Private Bag X7, Claremont 7735, Cape Town, South Africa Department of Botany and Biotechnology, University of Johannesburg, PO Box 524, Auckland Park 2006, Johannesburg, South Africa Received 16 May 2010; received in revised form 31 May 2010; accepted 1 June 2010

Abstract

The identity of the type of Tanacetum burchellii DC. is re-assessed. The original material cited by Augustin P. de Candolle represents two different species. When compared to the protologue, it is clear that only one of the two specimens fits the description and is therefore here designated as lectotype. However, the selected lectotype is clearly conspecific with albidiformis (Thell.) Källersjö and as a result the new combination Foveolina burchellii (DC.) Magee is proposed as the correct name for this taxon. The correct author citations, typifications and synonyms for both Foveolina burchellii and Pentzia punctata Harv. ex Hutch. are provided. © 2010 SAAB. Published by Elsevier B.V. All rights reserved.

Keywords: Asteraceae; Cotula burchellii; Foveolina albidiformis; Foveolina burchellii; comb. nov.; Pentzia burchellii; Pentzia punctata; ; Typifications

There has been much confusion around the application of the herein as the lectotype. Hutchinson (1917) suggested that the name Tanacetum burchellii DC. When describing T. burchellii, Burchell specimen, and therefore the name P. burchellii, De Candolle (1838) cited two very different collections, the one represented rather a species of Cotula L. and as a result applied an annual herb collected by William J. Burchell (Burchell 1337, Harvey's unpublished manuscript name, P. punctata, to the G-DC) and the other a shrubby perennial collected by Christian shrubby perennials that constituted Harvey's species concept. F. Ecklon (Ecklon 432, G-DC). Harvey (1865), having not seen Tanacetum burchellii has however, never formally been the Burchell material, transferred the species to the transferred to Cotula. The material appears largely to have Pentzia Thunb., reluctantly under the name Pentzia burchellii been filed in herbaria under the name C. burchellii and (DC.) Fenzl. ex. Harv. including, however, his manuscript name erroneously attributed to De Candolle in recent checklists of for the species, “Pentzia punctata Harv.”, in the synonymy. As southern African (Germishuizen et al., 2006) and sub-Saharan expressed by Harvey (1865), De Candolle's description of African (Klopper et al., 2006). T. burchellii as a herbaceous annual with the fruit lacking a While curating the Cotula collection at the Compton pappus was at odds with the characters evident on the material Herbarium (NBG), I came across some specimens identified seen by Harvey, including the Ecklon material annotated by De as “C. burchellii DC.”. Upon closer examination of the Candolle himself. As pointed out by Hutchinson (1917),itis inflorescence and fruit of these and several other collections, clear that De Candolle's description of T. burchellii was based including the type, it became apparent that the species was on the Burchell specimen alone and as result it is designated synonymous with the poorly known and collected Foveolina albidiformis (Thell.) Källersjö. Both F. albidiformis and ⁎ T. burchellii share a prominent resin canal on the adaxial South African National Biodiversity Institute, Compton Herbarium, Private surface of the involucral bracts and style branches, disciform Bag X7, Claremont 7735, Cape Town, South Africa. Tel.: +27 21 7998881; fax: +27 21 7614151. capitula with the marginal florets female and the inner disc E-mail address: [email protected]. florets hermaphroditic, the absence of an obvious pappus, as

0254-6299/$ - see front matter © 2010 SAAB. Published by Elsevier B.V. All rights reserved. doi:10.1016/j.sajb.2010.06.002 252 A.R. Magee / South African Journal of Botany 77 (2011) 251–252 well as prominently dimorphic capselas. Foveolina was des- validating description”, in accordance with Art. 7.7 of the cribed by Källersjö (1988) to accommodate five of the annual Code (McNeill et al., 2006). However, Harvey clearly species previously included within Pentzia (Hutchinson, 1917, indicated having seen only two of the specimens cited, these 1946; Merxmüller and Eberle, 1957), although only four being “Graafreynet, E. Z.!” and “Zuureberg, Burke & Zey.!”. species are currently recognized (Beyers, 2002). The name The Burke and Zeyher specimen is here designated as change proposed herein would not be the first for this often lectotype as it is from Harvey's own collection in Trinity overlooked taxon. Previously treated as Pentzia membranacea College Dublin and was annotated by him] Hutch., Källersjö (1988) used an older synonym Matricaria Pentzia burchellii Fenzl. ex. Harv. p.p. auct. non. DC. albidiformis Thell. when transferring the species to Foveolina. Källersjö (1988) considered the two names to be essentially nomenclatural synonyms “typified by different sheets of the Acknowledgements same Schlechter collection”. While the two names are indeed synonymous P. membranacea is certainly not typified by Drs J.S. Boatwright and J.P Roux (NBG) are acknowledged Schlechter's collection. Hutchinson (1946) clearly designated for their advice and comments on an earlier draft of the his collection (Hutchinson 709) from Kew Herbarium as the manuscript. The curators and herbarium staff from Conserva- type, making that specimen the holotype. toire botanique de la Ville de Genève, Swedish Museum of As the type of Tanacetum burchellii is clearly conspecific Natural History and Trinity College Dublin are thanked for with that of Foveolina albidiformis the latter becomes synony- supplying electronic images of type material and Dr L. Gautier mous with T. burchellii, a name which has priority. The correct (G) for the assistance in confirming the identity of Burchell author citations, typifications and synonymy for both Foveolina 1337 (G-DC). burchellii and Pentzia punctata are given below.

1. Foveolina burchellii (DC.) Magee comb. nov. Tanacetum References burchellii DC. Prodr. 6:132 (1838). Pentzia burchellii (DC.) – Fenzl ex. Harv. in Harv. and Sond., Fl. Cap. 3: 172 (1865), p.p. Beyers, J.B.P., 2002. Asteraceae Anthemideae: reduction of Foveolina albida to Foveolina dichotoma. Bothalia 32, 185–199. excl. descr. [Cotula burchellii nom. nud.] Type: South Africa, De Candolle, A.P., 1838. Prodromus Systematis Naturalis Regni Vegetabilis 6. “Cap. Bonae-Spei inter urbem et Zachrivier”, Burchell 1337 Treuttel & Wurtz, Paris. (G-DC, lecto., here designated — photo! ; K, isolecto. — Germishuizen, G., Meyer, N.L., Steenkamp, Y., Keith, M. (Eds.), 2006. A photo!). [Note: The Burchell collection is selected here as it Checklist of South African Plants. Southern African Botanical Diversity most closely matches the protologue and the specimen from Network Report 41. SABONET, Pretoria. Harvey, W.H., 1865. Compositae. In: Harvey, W.H., Sonder, W. (Eds.), Flora De Candolle's own collection in G-DC is designated as the Capensis, Vol. 3. Hodges, Smith and Co., Dublin. lectotype] Hutchinson, J., 1917. Notes on African Compositae: III. Pentzia, Thunb. Foveolina albidiformis (Thell.) Källersjö in Bot. J. Linn. Bulletin of Miscellaneous Information 1916, 240–254. Soc. 96(4): 320 (1988), syn. nov. Matricaria albidiformis Hutchinson, J., 1946. A Botanist in South Africa. P.A. Gawthorn Ltd, London. – Thell. in Schinz, Vierteljahrsschr. Naturf. Ges. Zürich 61: Källersjö, M., 1988. A generic reclassification of Pentzia Thunb. (Compositae “ Anthemideae) from South Africa. Botanical Journal of the Linnean Society 453 (1916). Type: South Africa, in arenosis humidis prope 96, 299–322. Claremont”, Schlechter 796 (Z, lecto. — photo!, designated Klopper, R.R., Chatelain, C., Bänninger, V., Habashi, C., Steyn, H.M., De Wet, by Källersjö, 1988). B.C., Arnold, T.H., Gautier, L., Smith, G.F., Spichiger, R., 2006. Checklist Pentzia membranacea Hutch. Botanist S. Afr. 144 (1946), of the flowering plants of Sub-Saharan Africa. An index of accepted names syn. nov. Type: South Africa, between Sutherland and and synonyms. South African Botanical Diversity Network Report 42. — SABONET, Pretoria. Middlepost, Hutchinson 709 (K, holo. photo!; BOL, McNeill, J., Barrie, F.R., Burdet, H.M., Demoulin, V., Hawksworth, D.L., iso.!). Marhold, K., Nicolson, D.H., Prado, J., Silva, P.C., Skog, J.E., Wiersema, J.H., 2. Pentzia punctata Harv. ex Hutch. in Bull. Misc. Inform. Turland, N.J. (Eds.), 2006. International Code of Botanical Nomenclature Kew 1917: 252. Type: South Africa, Zuurberg, Burke & (Vienna Code) Adopted by the Seventeenth International Botanical Congress Zeyher s.n. (TCD, lecto., here designated — photo!) [Note: Vienna, Austria, July 2005. : Regnum Vegetabile 146. A.R.G. Gantner Verlag, Ruggell, Liechtenstein. Harvey's manuscript name is here attributed to Hutchinson, Merxmüller, H., Eberle, E., 1957. Pentzia. In: Merxmüller, H., Compositen- being validated by the reference to Harvey's description. As Studien, IV. Mitteilungen der Botanishen Staatssammlung, Munchen 2, a result the type must be selected from “the context of the 317–338.

Edited by JC Manning