Daviesia anceps Turczaninow (1853: 266)

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

1. Daviesia anceps Turczaninow (1853: 266) , Bentham (1864: 89), Crisp (1995: 1169). Type: ‘ Drum. V. n. 86.’ Holotype: KW; isotypes: BM, K (3 sheets), G, MEL, P, W

Straggling, sometimes intricate shrubs, to 50 cm high, glabrous. Root anatomy with anomalous secondary thickening (cord type). Branchlets modified to cladodes, compressed but not winged (± biconvex), 1–2 mm broad, striate when dry with warty ridges that are transparent and appearing resinous. Phyllodes all reduced to small, exstipulate scales. Inflorescence: flowers solitary in axils of uppermost 1–3 scale-leaves (= bracts), thus comprising undifferentiated racemes terminating main or lateral shoots; peduncle nil; subtending bracts triangular, 1.5–2 mm long. Pedicels 2–3 mm long. Calyx 6–7 mm long including the 1–2 mm receptacle; lobes 2.5–4 mm long; upper 2 lobes united higher and closer than the lower 3, narrowly triangular; lower 3 lobes triangular. Corolla : standard very broadly elliptic, emarginate, 8–8.5 × 7–7.5 mm including the ca. 0.75 mm claw, with 2 calli at the base of the lamina, yellow with a triangular red border, and fine red veins radiating outward, around the yellow centre; wings narrowly elliptic with a rounded, upswept apex, adaxially auriculate, also with a small lobe about 1/3-way along the abaxial margin, ca. 7.5 × 2 mm including the 1–1.5 mm claw, with a channel from the auricle to part-way along the lamina, yellow; keel half transversely broadly elliptic (canoe-shaped), acute, auriculate, saccate, ca. 7.5 × 3 mm including the ca. 2–2.5 mm claw, yellow. Stamens uniform; filaments free, terete, tapering towards the apex; anthers 2-celled, versatile. Pod obliquely shallowly obtriangular with an acute to rounded apex, turgid, 7–9 × 4–5 mm; upper suture sigmoid; lower suture acute. Seed not seen. ( Fig. 2 ).

Flowering period:— November to January. Fruiting period: from January.

Distribution:— Western Australia, localised mainly around Ravensthorpe and along the adjacent south coast, especially in Fitzgerald River National Park and the Barrens.

Habitat:— Grows in sandy loam, clayey sand and gravelly or sandy laterite, in mallee or mallee-heath.

Selected specimens (20 examined):— WESTERN AUSTRALIA. Eyre: 3 km S of Ravensthorpe , 33°37’S, 120°03’E, R . D. Royce 9439, 31 January 1971 ( PERTH); 106 km from Esperance along road to Ravensthorpe, Munglinup River crossing, 33°43’S, 120°52’E, M . D. Crisp 4937, 8 January 1979 ( CBG, MEL, NSW, PERTH) ;

20 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

Fitzgerald River National Park , 3 km W of Annie Peak, 33°51’S, 119°57’E, M . D. Crisp 5033, 11 January 1979 ( AD, BRI, CBG, MEL, NSW, PERTH); Fitzgerald River National Park , 7 km WNW of Annie Peak, 33°50’S, 119°55’E, M . D. Crisp 5016, 11 January 1979 ( CBG); 12 km ESE of Ravensthorpe, 1.5 km E of Mt Desmond , 33°37’S, 120°10’E, M . D. Crisp 4952, 9 January 1979 ( AD, CBG, PERTH) .

Affinity:— See discussion under D. pachyloma .

Figures

FIGURE 2. Daviesia anceps. A. Flowering stem. B. Lateral branchlet with flower. C. Detail of inflorescences, with persistent pedicels of disarticulated flowers labelled ‘p’. D. Pod. E. Detail of warty branchlet ridges. A from Crisp 5033; B from Crisp 4937; C, E from Maxwell s.n. (MEL 72504); D from Crisp 4952. Drawn by A.L. Prowse and M.D. Crisp.