Daviesia polyphylla Benth.

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

122. Daviesia polyphylla Benth. in Lindley (1839: xiv), Bentham (1864: 86), Crisp (1987a: 252), Crisp (1995: 1222). Type: Not designated. Lectotype (Crisp 1995: 1222): Swan River, Drummond, 1839 (K, ex Herb. Bentham); isolectotype: BM (2 sheets), CGE, G, K

Bushy, spreading shrubs, to ca. 0.6 × 1 m, glabrous or minutely scabrous, especially on branchlet ridges. Root anatomy unknown. Branchlets ascending, numerous, angular with sharp ridges. Phyllodes rather crowded, diverging at 45–90°, vertically compressed, gently recurved from the base, obliquely narrowly ovate or elliptic, apically acuminate, pungent, with thickened margins, basally truncate, articulate, 5–20 × 1.5–2.5 mm, with 2 or 3 longitudinal nerves more evident when dry, dark green. Unit inflorescences 1 or more per axil, umbellate, 1- or 2- flowered; peduncle from almost nil to 0.5 mm long; rachis nil; barren basal bracts oblong, ca. 0.5 mm long. Pedicels 1–2.5 mm long; subtending bracts oblong to slightly spathulate, may be fimbriate to lacerated at the apex, ca. 0.5–1 mm long. Calyx 2–2.5 mm long including the 0.5–1 mm receptacle, with 5 faint ribs visible; lobes ca. 0.5 mm long; upper 2 lobes united higher and closer together than the lower 3; lower 3 lobes marginally longer. Corolla : standard transverse-elliptic to transverse-broad-elliptic, emarginate to rounded, 4.5–6 × 5–6 mm including the 0.5–1 mm claw, with 2 calli at the base of the lamina, yellow-orange with pink infusion marginally and a dark red centre; wings elliptic with a rounded, incurved apex, enclosing the keel, auriculate, auricles may be slightly hooked, 5–6.5 × 2 mm including the 1–2 mm claw, deep pink; keel half very broadly ovate with an acute,

268 • Phytotaxa 300 (1) © 2017 Magnolia Press

CRISP ET AL.

A MONOGRAPH OF DAVIESIA

Phytotaxa 300 (1) © 2017 Magnolia Press • 269 beaked apex, very slightly auriculate to not so, saccate, 5–6 × 1–1.5 mm including the 2–3 mm claw, deep pink. Stamens slightly dimorphic: inner whorl of 5 with longer filaments and shorter, versatile anthers; outer whorl of 5 with shorter filaments and longer, basifixed anthers; filaments all compressed, cohering; anthers all 2-celled. Pod obliquely very broadly, shallowly or very shallowly obtriangular, acute, pungent, swollen, 9–13 × 8–10 mm; upper suture strongly sigmoid; lower suture at 90°. Seed obovoid, with a slightly developed radicular lobe, 3.5–4 mm long, 2.2–2.5 mm broad, 1.7–2 mm thick, green to brown with black mottling; aril 1.6 mm long. ( Fig. 123 ).

Flowering period:— July to September. Fruiting period: September and October.

Distribution:— Western Australia, mainly coast and Darling Range from Green Head south to near Busselton.

Habitat:— Grows on laterite or gravelly sand, in heath dominated by Proteaceae , or with scattered emergent eucalypts such as Corymbia calophylla or Eucalyptus wandoo .

Selected specimens (48 examined):—WESTERN AUSTRALIA. Darling : 8 km N of Mogumber, on Perth– Moora road, 30°58’S, 116°02’E , M.D. Crisp 1061, 14 August 1975 ( CBG, MEL, PERTH); 9.3 km N of Mogumber , 30°58’S, 116°03’E , C. Chapman (22)78, 8 November 1978 ( CBG, PERTH); Darling Range scarp, near Wattle Grove (Perth), just S of Welshpool Road, 32°01’S, 116°02’E , M. D. Crisp 1047 ( CBG); 18 km E of Perth, Gooseberry Hill National Park , 31°57’S, 116°02’E , M. D. Crisp 6711, 24 July 1980 ( AD, CBG, L, NSW, US); Greenmount , Darling Range, 31°54’S, 116°03’E , A. Morrison s.n., 12 December 1902 ( CANB 336560 , PERTH); 2.8 km S of ‘ Merrie Lea’ and N of Mogumber, Helena Valley, 31°02’S, 116°03’E , J. Seabrook 23, 30 July 1977 ( PERTH); Kalamunda, 19 km E of Perth, 31°58’S, 116°03’E , R. Hamilton 148 & M. Hamilton, 13 August 1985 ( CANB, MEL) .

Affinity:— Similar vegetatively to D. angulata . The phyllodes of D. angulata tend to be linear, and when sigmoid are not dilated towards the apex, and are often longer (up to 35 mm long). The inflorescence of D. angulata , if 2–4-flowered, has a peduncle 2–6 mm long and a rachis 1–3.5 mm long, where that of D. polyphylla is more or less sessile with no rachis. The two species also have a different flowering period: D. angulata flowers from March to July.

Hybrids:— Daviesia angulata × D. polyphylla .

Figures

FIGURE 123. Daviesia polyphylla. A. Flowering branchlet. B, C. Phyllodes showing variation. D. Inflorescence. E. Pod. A, C, D from Crisp 6711; B from Crisp 1061; E from Crisp 1047. Drawn by A.L. Prowse.