Daviesia reclinata, Crisp & Cayzer & Chandler & Cook, 2017

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

11. Daviesia reclinata A.Cunn. ex Bentham (1864: 77) , Crisp (1992: 390), Crisp (1995: 1228). Type: ‘N. Australia. Arnhem N. Bay, R. Brown; Sims Island, A. Cunningham.’ Lectotype (Crisp 1995: 1228): ‘Sims’s Isld., N.C.’, A. Cunningham (K: Herb. Hooker, annotated ‘ reclinata sp. n. ’ by Bentham). Syntype: ‘Arnhem N. Bay, February 16 1803 ’, R. Brown (BM, annotated by Bentham). Other specimens which may be isolectotypes: Sims’ Island, 1st Voyage of ‘Mermaid’, A. Cunningham 257, 1818 (BM, CANB, E, K, NSW); Sims’ Island, 3rd Voyage of ‘Mermaid, A. Cunningham 50, 1820 (BM, CANB, NSW); Sims Island, A. Cunningham (K: Herb. Hooker, not annotated by Bentham); North Coast, New Holl., A. Cunningham (MEL)

Prostrate or straggling shrubs to m high and 2 m broad, glabrous. Root anatomy unknown. Branchlets lax, angular or compressed, triquetrous, ribbed. Phyllodes scattered, spreading to ascending, linear-elliptic, sometimes reduced to scales, acute or rarely obtuse, basally articulate and decurrent, 10–150 × 1–6(–8) mm, green; midrib and marginal nerves prominent; lateral veins numerous, longitudinal, anastomosing, conspicuous. Unit inflorescences axillary or terminal, racemose, with 5–10 widely spaced flowers, occasionally forming panicles with each constituent raceme subtended by a reduced leaf or bract; axillary racemes with peduncle 6–110 mm long and rachis triquetrous, 10–140 mm long; panicle branches, when present and determinate, with a peduncle 10–40 mm long and rachis 8–63 mm long; terminal inflorescences with indefinite peduncle and rachis, sometimes encompassing the entire seasonal growth of a branchlet; subtending bracts appressed, deltoid, keeled, ca. 0.75 mm long; barren bracts not forming a basal cluster, scattered, few. Pedicels 2.5–6.5 mm long. Calyx campanulate, 4–5 mm long, prominently 5–10-ribbed, slightly viscid and glossy, abruptly contracted to the 1.5–2 mm stipe-like receptacle, enlarging in fruit to 6–8 mm long and becoming scarious; upper 2 lobes oblong, ca. 2.5 mm long; lower 3 lobes deltoid, 1.5–2 mm long. Corolla pure yellow, occasionally infused with orange towards the centre of the standard; standard strongly reflexed, very broadly ovate, retuse, cordate, 7–8.5 × 6–7 mm including the 2–3 mm claw, with 2 calli at base of the lamina; wings narrowly obovate, apically incurved, auriculate, ca. 7 × 3 mm including the 2 mm claw; keel half broadly ovate, falcate, acute, slightly auriculate, saccate, ca. 6 × 2 mm including the 1.5 mm claw. Stamens weakly dimorphic: anthers 2-celled and basifixed; inner whorl of 5 with subterete filaments and compressed-ovoid anthers; outer whorl of 5 with compressed, longer filaments and narrowly ellipsoid anthers; filaments free. Pod obliquely shallowly obtriangular, acuminate and beaked, compressed, 10–13 × 5–7 mm including the long beak, smooth, glossy yellow-brown; upper suture gently sigmoid; lower suture acute but broadly curved. Seed ellipsoid, ca. 4 mm long, ca. 2.5 mm broad, ca. 2 mm thick, brown with fine black mottling; aril raised at centre, tapering to compressed, frilly margins, ca. 2 mm long. ( Fig. 13 ).

Flowering and fruiting period:— Any time of the year, perhaps with a peak in the winter dry season. Most specimens bear both flowers and fruits.

Distribution:— Disjunct in the Kimberley (WA) and Top End (NT). In the Northern Territory, D. reclinata extends throughout Arnhem Land, as well as offshore islands and east to the coast and islands of the Gulf of Carpentaria. The only two known Kimberley populations occur in the Prince Regent River and Kalumburu regions. Populations on Cape York Peninsula (Qld) previously attributed to this species have been described as D. flava .

Habitat:— Skeletal stony or sandy soils derived from sandstone, in open forest or woodland dominated by eucalypts such as E. miniata A.Cunn. ex Schauer (1843: 925) and E. tetrodonta Mueller (1859a: 97) , or in shrubland dominated e.g. by Calytrix Labillardière (1806 : t. 146) and Verticordia Candolle (1828: 3) , or in grassy savannah woodland (Lazarides 7992) dominated by Pandanus Parkinson (1773: 46) and Syzygium Gaertner (1788: 166) .

Selected specimens (48 examined):— WESTERN AUSTRALIA. Gardner: Between Calder and Prince Regent Rivers, C. A . Gardner s.n., 23 June 1921 ( PERTH 2730227 ); Blyxa Ck, Prince Regent River Reserve , 15°48’S, 125°20’E, A. S . George 12520, 21 August 1974 ( PERTH 2730227 ) . NORTHERN TERRITORY. Darwin & Gulf: Ca. 32 km S of Oenpelli Mission , N . Byrnes 1967, 15 September 1970 ( CANB, DNA); 12°34’S, 133°18’E, M . Lazarides 7568 ( BRI, CANB, DNA, MEL); ca. 27 km N of Mt Evelyn , 13°21’S, 132°54’E, M . Lazarides 7992, 3 March 1973 ( BRI, CANB); 8 km E of Goyder River crossing, 12°51’S, 135°05’E, J. R . Maconochie 1488, 17 June 1972 (DNA, PERTH); Elcho Island , 12°01’S, 135°37’E, J. R . Maconochie 2169, 10 July 1975 ( CANB, DNA); Gove , 12°15’S, 136°43’E, R. L . Specht 939, 22 August 1948 ( AD, BRI, CANB, MEL, NSW); 19 km SSW of Jabiru , 12°54’S, 132°52’E, I. R . Telford 7857 & J. W . Wrigley, 20 April 1980 ( CBG, DNA,

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 45 MO, NSW, PERTH ); Kakadu National Park , 2 km NNW of Koongarra Saddle, 12°45’S, 132°55’E, I . R . Telford 8140 & J . W . Wrigley , 24 April 1980 ( CBG) .

Affinity:— The most similar species is D. flava from the Cook and Kennedy North Districts of north Queensland, which used to be included in D. reclinata , though these species are not closely related ( Fig. 1A ). Daviesia flava resembles D. reclinata in general aspect, phyllodes, inflorescence, flower (including colour) and fruit morphology. It differs in having often broader phyllodes (to 15 mm), shorter somewhat corymbose racemes (rachis 10–40 mm), smaller flowers (e.g. calyx ca. 2.5 mm long), and the calyx is not noticeably accrescent in fruit. Daviesia longifolia , D. pauciflora and D. costata are also similar but all are restricted to south-west WA, have smaller inflorescences, petals with red markings and calyces that are not accrescent in fruit.

46 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

V. D. divaricata 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 13. Daviesia reclinata. A. Flowering branchlet. B. Inflorescence. C. Calyx opened out, upper lobes at left. D. Standard. E. Wing. F. Keel. G. Pod with enlarged calyx. H. Seed with frilly aril. A, C–F from Telford 7857; B, G from Telford 8140; H from George 12520. Drawn by B-J. Osborne and M.D. Crisp.