Daviesia nudiflora Meisner (1844: 53) subsp. amplectens Crisp (1995: 1214)

Crisp, Michael D., Cayzer, Lindy, Chandler, Gregory T. & Cook, Lyn G., 2017, A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae), Phytotaxa 300 (1), pp. 448-450 : 448-450

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.

Figures

FIGURE 38. Daviesia nudiflora, Part 1, comparing two of four subspecies. Daviesia nudiflora subsp. nudiflora. A. Flowering branchlet. B. Inflorescence (1-flowered). C. Pod. Daviesia nudiflora subsp. amplectens. D. Flowering branchlet. E. Single-flowered inflorescence in bud. F. Pod. A, B from Crisp 6471; C from Maiden s.n. (NSW 34924); D, E from Crisp 6536 (type); F from Crisp 6432. Drawn by B-J. Osborne (A–C) and A.L. Prowse (D–F)

FIGURE 39. Daviesia nudiflora, Part 2, comparing branchlets of all four subspecies. A. Daviesia nudiflora subsp. amplectens (from Crisp 6690). B–D. Daviesia nudiflora subsp. drummondii. (B from Drummond 133, type of synonym D. nudiflora var. lanceolata; C from Drummond coll. II no. 227, type of basionym D. drummondii; D from Crisp 6203). E. Daviesia nudiflora subsp. hirtella (E from George 2599). F, G. Daviesia nudiflora subsp. nudiflora (F from Phillips WA/68-723; G from Crisp 6531). Drawn by B-J. Osborne. Adapted from Crisp (1995) with permission from CSIRO Publishing.