Daviesia localis Hislop (2015: 27–30)

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

15. Daviesia localis Hislop (2015: 27–30) . Type: WESTERN AUSTRALIA: Darling [approximate locality data given because the species is rare]: north of Bindoon , 31°10’S, 116°20’E, F. Hort 1904, 6 November 2002. Holotype: PERTH 6230687 ; isotypes: CANB, MEL

Erect, spreading shrubs, 1.5–3 m high and to ca. 3 m wide, single-stemmed at ground level, apparently killed by fire, glabrous. Root anatomy unknown. Branchlets divaricate, straight, terete, striate, glabrous, minutely papillose to ± smooth; apex spinescent. Phyllodes scattered, shallowly antrorse to almost divaricate (45–80°), gently recurved,

52 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 53 terete, striate, apically acuminate and pungent, inarticulate at base, 2–8 × 0.7–1.2 mm; stipules caducous, filiform, 0.2–0.3 mm long. Unit inflorescence 1 per axil, umbelliform, 4–7-flowered; peduncle 5–9 mm long, viscid; subtending bracts appressed, oblong to narrowly elliptic, with ± scarious margins, 0.7–1.1 mm long, not striate, strongly concave adaxially. Pedicels 1.5–7.0 mm long, viscid; apex expanded, annular and wider than receptacle at articulation. Calyx 3.8–5.2 mm long, including the 1–2.5 mm long receptacle, lightly ribbed; upper 2 lobes united in a shallowly emarginate lip; lower 3 lobes very broad and short, <0.3 mm long; lobe apices with short, vesicular hairs, mostly inside. Corolla : standard depressed-ovate with a deeply emarginate apex, 8.5–9.5 × 8.5–10 including the 2.0– 2.3 mm claw, orange-yellow in distal half, red centrally with a conspicuous yellow, V-shaped mark; wings obovate with a rounded incurved overlapping apex, strongly auriculate at the base, 6.0–6.7 × 3.0– 3.5 mm including the 2.0– 2.5 mm claw, dull red; keel incurved with an obtuse apex, saccate, 5.5–6.0 × 2.8–3.2 mm, dull red. Stamens strongly dimorphic: inner whorl of 5 with filaments ± terete in the upper half (excluding the vexillary stamen), and anthers subdorsifixed with confluent thecae, ca. 0.3 mm long; outer whorl of 5 with filaments flattened throughout and with 2-celled, basifixed anthers, ca. 0.5 mm long; vexillary stamen with filament channelled adaxially in the upper half; filaments free. Pod obliquely obtriangular, compressed, acute, 15–18 × 6–8 mm, pale to dark brown at maturity, obscurely reticulate; upper suture gently sigmoid; lower suture strongly convex. Seed 6–7 mm long, 3.2– 3.5 mm wide, copper-brown; aril well-developed, cream-coloured, 4.0– 4.5 mm long. ( Fig. 17 ).

Flowering period:— Mainly between early October and the middle of November. Fruiting period: Mature fruit has been collected during the last week of November.

Distribution:— Currently known only from one population north of Bindoon, ca. 100 km NE of Perth.

Habitat:— The population occurs on a low ridge, in orange-brown sandy soil in the understorey of forest of Eucalyptus marginata Donn ex Smith (1802: 302) and Corymbia calophylla ( Lindley 1841: 72) K.D. Hill & Johnson (1995: 240) with a heathy understorey.

Conservation status:— National: Not listed. WA: Priority 1, possibly threatened or near-threatened but not yet adequately surveyed.

Specimens examined:— Approximate locality data given because the species is rare. WESTERN AUSTRALIA. Darling: North of Bindoon , 31°S, 116°E, M . Hislop 2352, 28 October 2001 ( CANB, PERTH); ibid., M . Hislop & F . Hort MH 2481 , 25 November 2001 ( CANB, PERTH); ibid. F. & J . Hort 3903, 30 October 2014 ( MEL, PERTH) .

Affinity:— Closely related to D. divaricata ( Fig. 1A ), with which it shares the morphological synapomophy of a distinctive pair of divergent yellow markings at the base of the standard, often basally joined to form a ‘V’ shape. Additionally, it has generally similar morphology in the growth habit, including spined-tipped striate branchlets, and similarity of the reproductive parts. Daviesia divaricata is readily distinguished by reduction of the leaves to appressed scales and by its non-viscid inflorescences.

VI. Lipped Calyx Clade

VI.a. D. cordata-longifolia Clade

Figures

FIGURE 1A. Phylogeny (part) of Daviesia estimated using maximum likelihood (PHYML) from concatenated sequences of ITS (nrDNA), and ndhF and trnL–trnF (cpDNA). The tree was rooted using the monotypic sister groups Viminaria and Erichsenia (not shown). The informal clade names are used for reference in the taxonomic treatment. Numbers on branches show non-bootstrap support. The tips are labelled with the taxon name and sample accession number.

FIGURE 17. Daviesia localis. Holotype. Photograph provided by the Curator of PERTH.