Daviesia lancifolia Turczaninow (1853: 263)

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

31. Daviesia lancifolia Turczaninow (1853: 263) , Crisp (1995: 1206). Daviesia mollis Turcz. var. minor Bentham (1864: 74) —replacement name for D. lancifolia Turcz. Type: ‘Drum. IV. n. 28. Holotype: KW; isotypes: BM (2 sheets), FI-W, G (2 sheets), K (2 sheets), MEL, W

Daviesia pedunculata Benth. in Lindley (1839: xiv) [var.] b minor Meisner (1844: 53). Type: ‘In glareosis sterilibus ad radices collium Konkoberuphills (Kent) d. 21. Nov. 1840. Herb. Preiss. no. 1154.’ Lectotype (Crisp 1995: 1206): LD; isolectotype: G (2 sheets), NY.

Prostrate to spreading-erect shrubs, to 0.5 m high and to 1 m broad, scabrous to occasionally glabrous and ± glaucous on vegetative parts. Root anatomy normal (unistelar). Branchlets terete, lightly ribbed. Phyllodes scattered, erect, mostly elliptic to obovate (to narrowly or broadly so), occasionally cuneate, ovate, orbicular or linear, apically truncate to acuminate, with the tip varying from pungent to mucronate (less rigid), marginally ± irregularly crenulate in the upper half, basally cuneate and constricted to a short pseudo-petiole, articulate at branchlet, 7–17(–20) × 2–11 mm. Unit inflorescences 1 or 2 per axil, umbellate or condensed racemes, 3–5- flowered; peduncle 9–31 mm long; rachis from almost nil to 4 mm long; subtending bracts oblong to narrowly triangular, keeled, spreading at the tips, 0.5–2 mm long; barren bracts oblong, keeled, ca. 1 mm long. Pedicels 3–7 mm long, somewhat viscid, thickened towards the apex, which is flanged. Calyx 3–4 mm long including the ca. 1 mm receptacle, all lobes having recurved tips; upper 2 lobes united in a truncate, emarginate lip, 2–2.5 mm long; lower 3 lobes narrowly triangular, ca. 2 mm long. Corolla : standard broadly ovate, emarginate, 6–7 × 6–6.5 mm including the 1–1.5 mm claw, with 2 small calli at the base of the lamina, yellow to pale orange with a thin (often faint) red ring surrounding the yellow centre; wings obovate with a rounded apex, auriculate, 6–7 × 2–2.5 mm including the 1–1.5 mm claw, yellow to red; keel half transversely ovate, acute, supervolute, auriculate, saccate, 5.5–7.5 × 1.5–2 mm including the ca. 1.5 mm claw, yellow to red. Stamens strongly dimorphic: inner whorl of 5 with longer, slender terete filaments and shorter, round, confluent, subbasifixed anthers; outer whorl of 5 with shorter, broader, compressed filaments and longer, oblong, 2-celled, basifixed anthers; filaments free. Pod obliquely shallowly-obtriangular with an acute or attenuate apex, 8–9 × 5–6 mm; upper suture strongly sigmoid; lower suture obtuse. Seed not seen. ( Fig. 32 ).

Flowering period:— October to March. Fruiting period: One specimen fruiting in January seen.

Distribution:— Western Australia, southern wheatbelt and south coast, from Narrogin and the Stirling Range east to the Hyden area and Mt Ragged.

Habitat:— Grows on sand, gravel, sandy clay, lateritic clay or rocky soils, in heath or mallee-shrublands.

Selected specimens (39 examined):— WESTERN AUSTRALIA. Roe: 7 km W of Ravensthorpe–Lake King road, 20 km S of Lake King, 33°16’S, 119°41’E, M . D. Crisp 4997, 10 January 1979 ( CBG, MEL, PERTH); by Ravensthorpe–Lake King road, 29 km NW of Ravensthorpe, 33°21’S, 119°52’E, M . D. Crisp 1003, 9 August 1975 ( CBG). Eyre: 1 km NW of Mt Melville, near Cape Riche , 34°35’S, 118°44’E, M . D. Crisp 5107, 14 January 1979 ( CBG); 25 km from Ravensthorpe along Lake King road, 33°25’S, 119°56’E, M . D. Crisp 4987, 10 January 1979 ( AD, CBG, K, MEL, PERTH); 35 km SE of Lake King , 4 km NE along Hayes Road from Ravensthorpe–Lake

82 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

King road, 33°23’S, 119°56’E, M . D. Crisp 4989, 10 January 1979 ( CBG); Albany , 35°00’S, 117°52’E, W. E . Blackall s.n., January 1938 ( PERTH 5189403 ); Pullitup Swamp ca. 10 km NNE of Bremer Bay, 34°21’S, 119°25’E, T. A . Halliday 302, 15 December 1974 ( AK, PERTH) .

Affinity:— Daviesia lancifolia is similar in appearance to D. mollis and D. pedunculata . Daviesia mollis can be readily distinguished by its phyllodes, which are broadly obovate or orbicular, 5–15 mm broad, pungent, green and conspicuously and softly hirsute. Daviesia pedunculata has ovate to elliptic phyllodes, the flowers are larger (e.g. calyx 5–6 mm long, standard 7.5–10 mm long), the standard has a large and conspicuous central maroon patch with a vertical yellow stripe, and the pods are larger (15–18 mm long).

Figures

FIGURE 32. Daviesia lancifolia. A. Prostrate flowering branchlet. B, C. Phyllodes showing variation. D. Inflorescence. E. Pod. A from Crisp 5165; B from Crisp 1003; C from Crisp 5107; D from Crisp 4989; E from Crisp 4987. Drawn by B-J. Osborne.