Daviesia campephylla Crisp (1995: 1180)

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

75. Daviesia campephylla Crisp (1995: 1180) . Type: Western Australia, Roe, 45 km NNE of Munglinup, ca. 33°20’S, ca. 121°01’E, K. Newbey 8162, 14 November 1980. Holotype: CBG; isotypes: K, PERTH

Low, spreading, often domed shrubs, 0.15–0.35 m high, 0.3–1 m broad, often reproducing by suckers, scaberulous on branchlets and phyllodes. Root anatomy anomalous (cord type) or normal (unistelar). Branchlets ascending, terete, lightly ribbed or longitudinally wrinkled, minutely scabrous. Phyllodes moderately crowded, ascending at ca. 45° but tending to bend irregularly and resembling looping caterpillars, often sigmoid, linear-clavate, terete or slightly vertically compressed, dilated distally so that the pungent apex projects obliquely, gently tapered to base, slightly thickened above the basal articulation, 6–16(–20) × 1–2 mm, minutely scabrous, with a shallow groove along each side, green. Unit inflorescences usually solitary in upper axils, racemose, 1–5-flowered; peduncle 0–1 mm long; rachis 0–4 mm long; subtending bracts appressed, ovate or oblong, with fimbriate margins, 1 mm long. Pedicels 1–4 mm long. Calyx 3–5 mm long, ± constricted at base into a ca. 1 mm long stipe-like receptacle; upper 2 lobes apiculate, united in a truncate, emarginate lip; lower 3 lobes triangular, apiculate, ca. 1 mm long. Corolla predominantly yellow with faint red markings; standard remaining partially folded at anthesis, very broadly ovate, emarginate, truncate or cordate at base, 5.5–7 × 5–7 mm including the 1–1.5 mm claw; wings broadly spathulate with rounded, incurved, overlapping apices, auriculate, 5–6 × 3 mm including the 1–2 mm claw; keel half broadly ovate, gently falcate, apex acute, saccate, auriculate, 5–5.5 × 1.5 mm including the 2 mm claw. Stamens slightly dimorphic: inner whorl of 5 with longer, narrower, terete filaments and shorter, subversatile anthers; outer whorl of 5 with shorter, broader compressed filaments and longer, basifixed anthers; filaments free, overlapping; anthers all oblong, 2-celled. Pod surrounded by persistent floral parts, obliquely obtriangular, acute, compressed, thin-walled, 5–7 × 3.5 mm; upper suture dilated near the apex, lower suture shallowly curved. Seed ellipsoid, 3.25 mm long, 1.75 mm broad, 0.75 mm thick, yellow-brown; aril oblong, 1 mm long. ( Fig. 76 ).

Flowering period:— November. Fruiting period: February.

Distribution:— Western Australia, known from a restricted area between Pyramid Lake (Cascade area) and Oldfield, north of Munglinup.

Habitat:— Occurs in shallow sandy loam with some lateritic gravel, over clay loam on a flat terrain on roadsides and also in the adjacent mallee dominated by eucalypts with a shrub understorey.

Additional specimens examined:— WESTERN AUSTRALIA. Roe: Ca. 95 km ENE of Ravensthorpe, 45 km NNE of Munglinup , 33°20’S, 121°01’E, K . Newbey 9685, 22 November 1982 ( CBG, MEL, NSW, PERTH); ibid., K . Newbey 9722, 23 February 1983 ( CBG, PERTH); ca. 8 km SE of Pyramid Lake, Rollond Road, 20 km from Fields Road towards Cascade Road , 33°16’S, 121°02’E, J . Taylor 1666 & P . Ollerenshaw, 11 September 1983 ( AD, CBG, MEL); ibid. except 22 km from Field’s Road towards Cascade Road , 33°17’S, 121°01’E, J . Taylor 1668–9 & P . Ollerenshaw, 11 September 1983 ( CBG, MEL, PERTH) .

Affinity:— This is a morphologically distinctive species. The upward dilation of the phyllodes and oblique black cusp at their apex, together with their angle and colour create a strong impression of small green looping caterpillars rearing from the branchlets. The flowers and fruits do not closely resemble those of any other species. In certain forms of D. physodes and D. incrassata , some of the upper phyllodes are subterete and dilated near the apex, and resemble those of D. campephylla . However, the phyllodes of D. incrassata differ in being continuous with the branchlets. Both D. physodes and D. incrassata differ from D. campephylla in having glaucescent and highly variable phyllodes. Towards the base of these plants, the phyllodes become vertically flattened and several millimetres broad. Both have larger (ca. 12 × 10 mm), turgid pods and petals with pink and dark red markings. Another species with phyllodes that are green, terete, pungent, articulate and scaberulous is D. articulata , but it differs in having needle-like, widely spreading phyllodes with no upward dilation. Daviesia asperula also has pungent, articulate, scaberulous phyllodes, but they are striate with multiple nerves and are either subulate (ie. tapered upwards, not downwards) or falciform; most importantly, they are not dilated near the apex, and the apical cusp is in line with the direction of the phyllode. Also, in D. asperula the petals are orange-yellow with strong (not faint) red markings.

The molecular phylogeny shows D. campephylla to be nested within D. aphylla (clade VII.b, Fig. 1B ) but the latter differs in having short (<20 mm) divaricate, straight phyllodes that are restricted to the branchlet apex and are continuous (not articulate) with the branchlet.

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 173

174 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

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 76. Daviesia campephylla. Holotype. Photograph provided by the Curator of CANB.