Daviesia nudiflora Meisner (1844: 53) subsp. drummondii (Meisn.) 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

40c. Daviesia nudiflora Meisner (1844: 53) subsp. drummondii (Meisn.) Crisp (1995: 1214) . Daviesia drummondii Meisner (1844: 53) , Bentham (1864: 80). Type: ‘Swan River, James Drummond [coll. II] n. 227.’ Holotype: BM; isotypes: G (3 sheets), K (2 sheets), MEL, OXF, P (2 sheets), PERTH, W (2 sheets)

Daviesia nudiflora Meisn. var. lanceolata Bentham (1864: 79) . Type: ‘Drummond n. 133.’ Lectotype (Crisp 1995: 1214): K (sheet labelled ‘Negative no. Kew 939’); isolectotype: K, MEL 79066–7 .

Bushy shrubs to 1.5 m high. Branchlets angular with decurrent ribs. Phyllodes produced all along the branchlets, spaced 3–10 mm apart, ascending at 0–30(–45)°, ovate to elliptic or occasionally obovate, usually narrow to linear, concave above or flat, apically acuminate, pungent, tapered to the base, 4–20 (30) × 2–6 mm, minutely scabrid, glaucous to yellow-green. Unit inflorescences distributed along branchlets, in axils of phyllodes. Corolla : standard transversely broadly elliptic, 7–9 × 7–9 mm including the claw. Pod narrow, broadly curved along lower suture, 11–14 × 5–6 mm. ( Fig. 39B–D ).

A MONOGRAPH OF DAVIESIA

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Distribution:— This subspecies occurs in the central wheatbelt of Western Australia, from Ballidu south to York and east to Corrigin.

Selected specimens (32 examined):— WESTERN AUSTRALIA. Avon: Wongan Hills, near Research Station , 30°49’S, 116°37’E, A. S . George 3705, 16 June 1962 ( PERTH); 8 km E of Goomalling , 31°16’S, 116°55’E, R . D. Royce 7503, 18 August 1962 ( PERTH); 5.5 km SW of Cunderdin , 31°41’S, 117°11’E, M . D. Crisp 6203 et al., 27 September 1979 ( CBG, PERTH); Tammin , 31°38’S, 117°29’E, J. H . Maiden s.n., September 1909 ( NSW 34923 ) .

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CRISP ET AL.

Affinity:— This taxon is a complex suite of populations which vary considerably in the shape of their phyllodes, even in the same stand. It occurs in the central wheatbelt, immediately south and west of subsp. amplectens . The defining character is the production of basally tapered phyllodes all the way along the branchlets; also, the phyllodes are mostly narrower than in the other subspecies. In subsp. nudiflora and subsp. hirtella , phyllodes are developed only near the apex of the branchlets, with long naked stems below with scale-leaves that subtend most of the flowers (hence the name of the species). The fourth subspecies, amplectens, resembles subsp. drummondii in developing phyllodes all along the stems, but differs because the phyllodes are crowded, widely spreading, heart-shaped, stem-clasping, broader (4–15 mm) and glaucous to pruinose.

Figures

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.