A new Cynoglossum species, and transfers to Hackelia in eastern Australian BoraginaceaeRichard J. Dimon A and Matt A. M. Renner B C
A School of Life and Environmental Sciences, University of Sydney, NSW 2006, Australia.
B National Herbarium of New South Wales, Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney, NSW 2000, Australia.
C Corresponding author. Email: firstname.lastname@example.org
Australian Systematic Botany 30(2) 113-123 https://doi.org/10.1071/SB17004
Submitted: 12 January 2017 Accepted: 3 March 2017 Published: 17 August 2017
Recent molecular evidence supports the transfer of two Australian endemic species, Austrocynoglossum latifolium (R.Br.) R.R.Mill and Cynoglossum suaveolens R.Br., to the genus Hackelia Opiz as H. latifolia (R.R.Mill) Dimon & M.A.M.Renner, comb. nov., and H. suaveolens (R.Br.) Dimon & M.A.M.Renner, comb. nov. Hackelia latifolia comprises two morphological entities that, although sharing the procumbent-prostrate habit and production of elongated internodes and frondose bracts in the inflorescence, differ in a range of qualitative and quantitative micro-morphological characters. Hackelia latifolia has few, widely spaced, thorn-like trichomes on stems, a glabrous abaxial lamina surface, and mericarps with free glochids densely and evenly distributed over the outer surface, and a rectangular cicatrix at the mericarp apex, which is beaked. The other entity has many densely packed cellular trichomes on the stems, trichomes on the abaxial leaf lamina, and mericarps with a wing formed by basally connate glochids, and a triangular cicatrix located centrally on the inner mericarp surface. For the latter, we propose the new species Cynoglossum torvum Dimon & M.A.M.Renner, and by implication suggest that H. latifolia is polyphyletic as previously circumscribed. Whereas H. latifolia s.s. is widespread along the south-eastern coast of Australia from Tasmania to south-eastern Queensland, Cynoglossum torvum is restricted to the tablelands of north-eastern New South Wales and south-eastern Queensland. We compare C. torvum with the other Australian Cynoglossum L. species, C. australe R.Br., confirm previous observations of variation in mericarp morphology, and suggest that further investigation to resolve species circumscription is required given this variation.
Additional keywords: Austrocynoglossum, multivariate analysis, PCA, taxonomy.
ReferencesBrown R (1810) ‘Prodromus Florae Novae Hollandiae.’ (Richard Taylor and Associates: London, UK)
Buys MH, Hilger HH (2003) Boraginaceae cymes are exclusively scorpioid and not helicoid. Taxon 52, 719–724.
| Boraginaceae cymes are exclusively scorpioid and not helicoid.CrossRef |
Chacón J, Luebert F, Hilger HH, Ovchinnikova S, Selvi F, Cecchi L, Guilliams CM, Hasenstab-Lehman K, Sutorý K, Simpson MG, Weigend M (2016) The borage family (Boraginaceae s. str.): a revised infrafamilial classification based on new phylogenetic evidence, with emphasis on the placement of some enigmatic genera. Taxon 65, 523–546.
| The borage family (Boraginaceae s. str.): a revised infrafamilial classification based on new phylogenetic evidence, with emphasis on the placement of some enigmatic genera.CrossRef |
Harden G (Ed.) (1992) ‘Flora of New South Wales, Vol. 3.’ (New South Wales University Press: Sydney, NSW, Australia)
Hilger HH, Greuter W, Stier V (2015) Taxa and names in Cynoglossum sensu lato (Boraginaceae, Cynoglosseae): an annotated, synonymic inventory, with links to the protologues and mention of original material. Biodiversity Data Journal 3, e4831
| Taxa and names in Cynoglossum sensu lato (Boraginaceae, Cynoglosseae): an annotated, synonymic inventory, with links to the protologues and mention of original material.CrossRef |
Jessop J, Toelken H (Eds) (1986) ‘Flora of South Australia. Part III. Polemoniaceae–Compositae’, 4th edn. (South Australian Government Printing Division: Adelaide, SA, Australia)
Ladiges PY, Marks CE, Nelson G (2011) Biogeography of Nicotiana section Suavolentes (Solanaceae) reveals geographical tracks in arid Australia. Journal of Biogeography 38, 2066–2077.
| Biogeography of Nicotiana section Suavolentes (Solanaceae) reveals geographical tracks in arid Australia.CrossRef |
Linneaus C (1753) ‘Species Plantarum, Vol. 1.’ (Larentius Salvius: Stockholm, Sweden)
Luebert F, Couvreur TLP, Gottschling M, Hilger HH, Miller JS, Weigend M (2017) Historical biogeography of Boraginales: West Gondwanan vicariance followed by long-distance dispersal? Journal of Biogeography 44, 158–169.
| Historical biogeography of Boraginales: West Gondwanan vicariance followed by long-distance dispersal?CrossRef |
Mill RR (1989) The taxonomic status of Cynoglossum latifolium (Boraginaceae). Notes from the Royal Botanic Garden Edinburgh 46, 43–47.
Olmstead RG, Bohs L, Migid HA, Santiago-Valentin E, Garcia VF, Collier SM (2008) A molecular phylogeny of the Solanaceae. Taxon 57, 1159–1181.
Perret M, Chautems A, de Araujo AO, Salamin N (2013) Temporal and spatial origin of Gesneriaceae in the New World inferred from plastid DNA sequences. Botanical Journal of the Linnean Society 171, 61–79.
| Temporal and spatial origin of Gesneriaceae in the New World inferred from plastid DNA sequences.CrossRef |
Popov MG (1953) Boraginaceae. In ‘Flora SSSR. Vol. 19, Tubiflorae’. (Eds B Shiskin, E Bobrov) pp. 97–691. (Izdatel’stvo Akademii Nauk SSSR: Moscow, USSR)
Schneider CA, Rasband WS, Eliceiri KW (2012) NIH Image to ImageJ: 25 years of image analysis. Nature Methods 9, 671–675.
| NIH Image to ImageJ: 25 years of image analysis.CrossRef | 1:CAS:528:DC%2BC38XhtVKntb7P&md5=88489dc1eb5dea2caf7a65ef67434775CAS |
Selvi F, Bigazzi M (2001) Leaf surface and anatomy in Boraginaceae tribe Boragineae with respect to ecology and taxonomy. Flora 196, 269–285.
| Leaf surface and anatomy in Boraginaceae tribe Boragineae with respect to ecology and taxonomy.CrossRef |
Venables WN, Ripley BD (2002) ‘Modern Applied Statistics with S’, 4th edn. (Springer: New York, NY, USA)
Weigend M, Luebert F, Selvi F, Brokamp G, Hilger HH (2013) Multiple origins for hound’s tongues (Cynoglossum L.) and navel seeds (Omphalodes Mill.): the phylogeny of the borage family (Boraginaceae s. str.). Molecular Phylogenetics and Evolution 68, 604–618.
| Multiple origins for hound’s tongues (Cynoglossum L.) and navel seeds (Omphalodes Mill.): the phylogeny of the borage family (Boraginaceae s. str.).CrossRef |
Weigend M, Selvi F, Thomas DC, Hilger HH (2016) Boraginaceae. In ‘The Families and Genera of Vascular Plants. Volume XIV. Flowering Plants. Eudicots’. (Eds JW Kadereit, V Bittrich) pp. 41–102. (Springer Publishing: Cham, Switzerland)
Woo VL, Funke MM, Smith JF, Lockhart PJ, Garnock-Jones PJ (2011) New World origins of Southwest Pacific Gesneriaceae: multiple movements across and within the South Pacific. International Journal of Plant Sciences 172, 434–457.
| New World origins of Southwest Pacific Gesneriaceae: multiple movements across and within the South Pacific.CrossRef |