Published March 24, 2017 | Version v1
Taxonomic treatment Open

Daviesia nudiflora subsp. amplectens Crisp (1995: 1214

  • 1. Research School of Biology, The Australian National University, Acton, Australian Capital Territory 2601, Australia. Email: mike. crisp @ anu. edu. au
  • 2. Research School of Biology, The Australian National University, Acton, Australian Capital Territory 2601, Australia. Email: mike. crisp @ anu. edu. au & Present address: Australian National Herbarium, Centre for Plant Biodiversity Research, GPO Box 1700, Canberra, Australian Capital Territory 2601, Australia. Email: lcayzer @ netspeed. com. au
  • 3. Research School of Biology, The Australian National University, Acton, Australian Capital Territory 2601, Australia. Email: mike. crisp @ anu. edu. au & Present address: Department of Agriculture and Water Resources, 1 Pederson Road, Eaton, Northern Territory 0812, Australia. Email: gregory. chandler @ agriculture. gov. au
  • 4. Research School of Biology, The Australian National University, Acton, Australian Capital Territory 2601, Australia. Email: mike. crisp @ anu. edu. au & School of Biological Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia. Email: l. cook @ uq. edu. au & Research School of Biology, The Australian National University, Acton, Australian Capital Territory 2601, Australia. Email: mike. crisp @ anu. edu. au

Description

40b. Daviesia nudiflora Meisner (1844: 53) subsp. amplectens Crisp (1995: 1214). Type: Western Australia, Avon, 8 km NE of Dowerin, 31°09’S, 117°05’E, M. D. Crisp 6536, 18 July 1980. Holotype: CBG; isotypes: AD, CANB, K, L, NSW, PERTH

Bushy shrubs to 2.5 m high × 3 m wide. Branchlets sharply angular with decurrent midribs. Phyllodes produced all along the branchlets, crowded (in typical specimens, margins of adjacent phyllodes are in contact) or closely spaced (up to 5 mm apart), spreading at 60–90°, broadly ovate, concave above, acuminate with a long, rigid, pungent apex, basally amplexicaul and cordate or truncate, 5–18 × 4–15 mm, smooth, glaucous to pruinose. Unit inflorescences distributed along branchlets, in axils of phyllodes. Corolla: standard broadly ovate, 9–10 × 7–9 mm including the claw. Pod sharply curved along lower suture, 10–13 × 7–9 mm. (Figs 38D–F, 39A).

Distribution:— Western Australia, in the north-eastern wheatbelt from Mt Collier, NE of Cadoux, south to the area around Dowerin.

Selected specimens (12 examined):— WESTERN AUSTRALIA. Avon: Dowerin, 31°12’S, 117°02’E, B. Rosier 50, August 1959 (PERTH); 1 km SW of Amery railway station, 31°10’S, 117°04’E, M. D. Crisp 6342, 3 October 1979 (AD, CBG, MEL, NSW, PERTH, UWA); Amery town site, western boundary, 31°08’S, 117°05’E, B. H. Smith 388, 3 August 1984 (AD, CBG, HO, MEL, NSW, PERTH); Namalcatching Well reserve, 15 km E of Dowerin, B. V. Smith 1, 25 April 1981 (CBG); N of Cadoux, 7 km E of Kirwan, M. D. Crisp 6690, 23 July 1980 (AD, CBG, K, MEL, NSW).

Affinity:— This is the most distinctive of the subspecies of D. nudiflora (Crisp 1995) and, if only the typical populations (from around Dowerin) were known, it would be treated as a species. However, some populations north of Cadoux clearly show a link to subsp. drummondii, as seen in the wider spacing of the nodes, the slightly narrower shape of the phyllodes, and a glaucous rather than pruinose epidermis, e.g. Lally & Lepschi TR 1113 (CANB, PERTH) from Petrudor Rocks area and B.V. Smith 5 (CBG 8102467) from near Mt Collier.

Notes

Published as part of Crisp, Michael D., Cayzer, Lindy, Chandler, Gregory T. & Cook, Lyn G., 2017, A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae), pp. 448-450 in Phytotaxa 300 (1) on pages 448-450, DOI: 10.11646/phytotaxa.300.1.1, http://zenodo.org/record/13688467

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References

  • Meisner, C. D. F. (1844) Papilionaceae. Tribus I. Podalyrieae. In: Lehmann, J. G. C. (Ed.) Plantae Preissianae, volume 1. Meissner, Hamburg, pp. 24 - 78.