Daviesia ulicifolia subsp. aridicola Chandler & Crisp (1997: 39 : 528

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

10e. Daviesia ulicifolia subsp. aridicola Chandler & Crisp (1997: 39: 528 ), Craigie (2015: 33), Crisp (2002: 528). Type: South Australia, North-West, ca. 5 km N of Ooldea, 30°25’S, 131°50’E, P.G. Wilson 1789, 20 September 1960. Holotype: AD; isotypes: E, SI

Shrubs with glaucescent vegetative parts. Root anatomy unknown. Branchlets prominently ribbed and very rigid, ascending, glabrous. Phyllodes narrowly ovate, truncate at base, 8–17.5 × 1.3–2.5 mm; upper face convex with midrib more prominent than below. Unit inflorescences umbellate or shortly racemose 1(2) per axil, 2–7-flowered; barren basal bracts imbricate; subtending bracts foliose, 1–2 mm long; peduncle 0.7–2 mm long, rachis 0.1–1.1 mm long. Pedicels 1–4 mm long. Calyx 2.3–3.5 mm long including the 0.8–1 mm receptacle, faintly to prominently ridged; upper lobes united higher than lower 3, lower lobes acute, all minutely ciliate on the margins. Corolla : standard broader than long with a shallow apical sinus, ca. 2.8–3.2 × 3.5–4 mm including the 1.3–2 mm claw, darkish red centrally grading to orange at the margins and apex; wings auriculate, ca. 4 × 1.4 mm including

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 43 the 1.5–2 mm claw, red centrally grading to orange at the margins; keel ca. 4 × 1.5–2 mm including the 1.5 mm claw, slightly auriculate, moderately saccate, slightly acute to acute, dark red. ( Fig. 11B ).

Flowering period:— May to November. Fruiting period: Unknown.

Distribution:— Great Victoria Desert (Western Australia and South Australia) to northern Eyre Peninsula, far south-western New South Wales and far north-western Victoria. These are the western-most populations of the species, as well as being in the most arid, inland habitats. Although widespread, this subspecies appears to be uncommon in the field.

Habitat:— On deep sandy soil (dunes) in arid areas with mallee eucalypts over shrubs (e.g. Acacia and Triodia ).

Selected specimens (13 examined):— WESTERN AUSTRALIA. Helms: 12 km S of Neale Junction , 28°22’S, 125°28’E, H. R . Toelken , 6 September 1979 ( AD, CANB); ca. 130 km E of Laverton, 12.5 km W along White Cliffs Road from Yamarna homestead ruins, 28°14’S, 123°35’E, M . D. Crisp 11297, 8 September 2012 ( CANB) . SOUTH AUSTRALIA. Eyre Peninsula: Lake Everard , ca. 31°30’S, 135°15’E, W. S . Reid s.n., 31 March 1960 ( AD); Murray Basin: 13 km NNE of Renmark, 2.5 km SW of Murtho Park , 34°04’S, 140°49’E, M . D. Crisp 6975, 25 November 1980 ( CBG, MEL) . NEW SOUTH WALES: South Far Western Plains: 36 km S of Pooncarie , ca. 33°40’S, 142°25’E, Anon. s.n. ( NT 45679 ) .

Affinity:— Daviesia ulicifolia subsp. aridicola has very thick, glaucescent phyllodes, ca. 0.4–0.6 mm thick, whereas other subspecies of D. ulicifolia have thinner phyllodes, ca. 0.2–0.4 mm thick, that are not glaucous. In inflorescence structure and flower colour, this subspecies most closely resembles subsp. incarnata , which differs in only occasionally having racemose inflorescences, most being umbellate. Daviesia ulicifolia subsp. aridicola also resembles subumbellate-inflorescence form of subsp. ulicifolia ( Chandler & Crisp 1997) , e.g. from western Victoria, but the standard and wing petals of subsp. aridicola are orange marginally with dull red central markings, as opposed to the yellow with dark red markings in subsp. ulicifolia .

Figures

FIGURE 11. Daviesia ulicifolia subsp. ulicifolia. A. Flowering branchlet. B. Inflorescence (1-flowered). C. Pod. A, B from Crisp 6738; C from Rodway 15476. Drawn by B-J. Osborne. Adapted from Chandler and Crisp (1997), with permission from CSIRO Publishing.